- Table of contents
- Important Note from v1.4.0
- Why do we need this Portenta_H7_AsyncWebServer library
- Changelog
- Prerequisites
- Installation
- Packages' Patches
- Important things to remember
- Principles of operation
- Request Variables
- Responses
- Redirect to another URL
- Basic response with HTTP Code
- Basic response with HTTP Code and extra headers
- Basic response with string content
- Basic response with string content and extra headers
- Respond with content coming from a Stream
- Respond with content coming from a Stream and extra headers
- Respond with content coming from a Stream containing templates
- Respond with content coming from a Stream containing templates and extra headers
- Respond with content using a callback
- Respond with content using a callback and extra headers
- Respond with content using a callback containing templates
- Respond with content using a callback containing templates and extra headers
- Chunked Response
- Chunked Response containing templates
- Print to response
- ArduinoJson Basic Response
- ArduinoJson Advanced Response
- Param Rewrite With Matching
- Using filters
- Bad Responses
- Async WebSocket Plugin
- Async Event Source Plugin
- Remove handlers and rewrites
- Setting up the server
- Examples
- 1. For Vision-shield Ethernet
- 1. Async_AdvancedWebServer
- 2. Async_HelloServer
- 3. Async_HelloServer2
- 4. Async_HttpBasicAuth
- 5. Async_PostServer
- 6. MQTTClient_Auth
- 7. MQTTClient_Basic
- 8. MQTT_ThingStream
- 9. WebClient
- 10. WebClientRepeating
- 11. Async_AdvancedWebServer_MemoryIssues_SendArduinoString New
- 12. Async_AdvancedWebServer_MemoryIssues_Send_CString New
- 2. For Murata WiFi
- 1. For Vision-shield Ethernet
- Example Async_AdvancedWebServer
- Debug Terminal Output Samples
- 1. MQTT_ThingStream on PORTENTA_H7_M7 using Ethernet
- 2. WebClientRepeating on PORTENTA_H7_M7 using Ethernet
- 3. MQTTClient_Auth on PORTENTA_H7_M7 using Ethernet
- 4. MQTTClient_Basic on PORTENTA_H7_M7 using Ethernet
- 5. Async_HTTPBasicAuth on PORTENTA_H7_M7 using Ethernet
- 6. Async_AdvancedWebServer on PORTENTA_H7_M7 using Ethernet
- 7. Async_AdvancedWebServer on PORTENTA_H7_M7 using WiFi
- 8. Async_AdvancedWebServer_MemoryIssues_Send_CString on PORTENTA_H7_M7 using Ethernet
- Debug
- Troubleshooting
- Issues
- TO DO
- DONE
- Contributions and Thanks
- Contributing
- License
- Copyright
The new v1.4.0
has added a new and powerful feature to permit using CString
in optional SDRAM
to save heap to send very large data
.
Check the marvelleous
PR of @salasidis request->send(200, textPlainStr, jsonChartDataCharStr); - Without using String Class - to save heap #8 and these new examples
- Async_AdvancedWebServer_MemoryIssues_Send_CString for Ethernet
- Async_AdvancedWebServer_MemoryIssues_SendArduinoString for Ethernet
- Async_AdvancedWebServer_MemoryIssues_Send_CString for WiFi
If using Arduino String, to send a buffer around 40 KBytes, the used Max Heap
is around 111,500 bytes (~3 times)
If using CString in SDRAM, with the same 40 KByte, the used Max Heap
is around 14,314 bytes
If using CString in regular memory, with the same 40 KByte, the used Max Heap
is around 51,823 bytes (~1 times)
This is very critical in use-cases where sending very large data
is necessary, without heap-allocation-error
.
- The traditional function used to send
Arduino String
is
such as
request->send(200, textPlainStr, ArduinoStr);
The required HEAP is about 3 times of the String size
- To use
CString
but don't destroy it after sending. Use function
such as
request->send(200, textPlainStr, cStr);
The required HEAP is also about 3 times of the CString size
- To use
CString
but destroy it after sending. Use function
such as
request->send(200, textPlainStr, cStr, false);
The required HEAP is also about 1 times of the CString size without using SDRAM, or none if using SDRAM.
Why do we need this Portenta_H7_AsyncWebServer library
This library is based on, modified from:
to apply the better and faster asynchronous feature of the powerful ESPAsyncWebServer Library into Portenta_H7. Thus Portenta_H7_AsyncWebServer is part of a series of advanced Async libraries, such as AsyncTCP, AsyncUDP, AsyncWebSockets, AsyncHTTPRequest, AsyncHTTPSRequest, etc. to be written or modified to support Portenta_H7, using either Vision-shield Ethernet
or Murata WiFi
.
- Using asynchronous network means that you can handle more than one connection at the same time
- You are called once the request is ready and parsed
- When you send the response, you are immediately ready to handle other connections while the server is taking care of sending the response in the background
- Speed is OMG
- Easy to use API, HTTP Basic and Digest MD5 Authentication (default), ChunkedResponse
- Easily extensible to handle any type of content
- Supports Continue 100
- Async WebSocket plugin offering different locations without extra servers or ports
- Async EventSource (Server-Sent Events) plugin to send events to the browser
- URL Rewrite plugin for conditional and permanent url rewrites
- ServeStatic plugin that supports cache, Last-Modified, default index and more
- Simple template processing engine to handle templates
- Portenta_H7 boards such as Portenta_H7 Rev2 ABX00042, etc., using ArduinoCore-mbed mbed_portenta core using
Vision-shield Ethernet
orMurata WiFi
Arduino IDE 1.8.19+
for Arduino.ArduinoCore-mbed mbed_portenta core 3.3.0+
for Arduino Portenta_H7 boards, such as Portenta_H7 Rev2 ABX00042, etc...
Portenta_H7_AsyncTCP library v1.4.0+
for Portenta_H7 usingVision-shield Ethernet
orMurata WiFi
.
The best and easiest way is to use Arduino Library Manager
. Search for Portenta_H7_AsyncWebServer
, then select / install the latest version. You can also use this link for more detailed instructions.
- Navigate to Portenta_H7_AsyncWebServer page.
- Download the latest release
Portenta_H7_AsyncWebServer-main.zip
. - Extract the zip file to
Portenta_H7_AsyncWebServer-main
directory - Copy the whole
Portenta_H7_AsyncWebServer-main
folder to Arduino libraries' directory such as~/Arduino/libraries/
.
- Install VS Code
- Install PlatformIO
- Install Portenta_H7_AsyncWebServer library by using Library Manager. Search for Portenta_H7_AsyncWebServer in Platform.io Author's Libraries
- Use included platformio.ini file from examples to ensure that all dependent libraries will installed automatically. Please visit documentation for the other options and examples at Project Configuration File
To be able to upload firmware to Portenta_H7 using Arduino IDE in Linux (Ubuntu, etc.), you have to copy the file portenta_post_install.sh into mbed_portenta directory (~/.arduino15/packages/arduino/hardware/mbed_portenta/3.3.0/portenta_post_install.sh).
Then run the following command using sudo
$ cd ~/.arduino15/packages/arduino/hardware/mbed_portenta/3.3.0
$ chmod 755 portenta_post_install.sh
$ sudo ./portenta_post_install.sh
This will create the file /etc/udev/rules.d/49-portenta_h7.rules
as follows:
# Portenta H7 bootloader mode UDEV rules
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2341", ATTRS{idProduct}=="035b", GROUP="plugdev", MODE="0666"
Supposing the ArduinoCore-mbed core version is 3.3.0. Now only one file must be copied into the directory:
~/.arduino15/packages/arduino/hardware/mbed_portenta/3.3.0/portenta_post_install.sh
Whenever a new version is installed, remember to copy this files into the new version directory. For example, new version is x.yy.zz
This file must be copied into the directory:
~/.arduino15/packages/arduino/hardware/mbed_portenta/x.yy.zz/portenta_post_install.sh
To be able to compile, run on Portenta_H7 boards, you have to copy the whole mbed_portenta Packages_Patches directory into Arduino mbed_portenta directory (~/.arduino15/packages/arduino/hardware/mbed_portenta/2.5.2).
Supposing the Arduino mbed_portenta version is 2.5.2. These file must be copied into the directory:
~/.arduino15/packages/arduino/hardware/mbed_portenta/2.5.2/libraries/SocketWrapper/src/MbedUdp.h
~/.arduino15/packages/arduino/hardware/mbed_portenta/2.5.2/libraries/SocketWrapper/src/MbedUdp.cpp
~/.arduino15/packages/arduino/hardware/mbed_portenta/2.5.2/cores/arduino/mbed/connectivity/lwipstack/include/lwipstack/lwipopts.h
- This is fully asynchronous server and as such does not run on the loop thread.
- You can not use yield() or delay() or any function that uses them inside the callbacks
- The server is smart enough to know when to close the connection and free resources
- You can not send more than one response to a single request
- Listens for connections
- Wraps the new clients into
Request
- Keeps track of clients and cleans memory
- Manages
Rewrites
and apply them on the request url - Manages
Handlers
and attaches them to Requests
- TCP connection is received by the server
- The connection is wrapped inside
Request
object - When the request head is received (type, url, get params, http version and host),
the server goes through all
Rewrites
(in the order they were added) to rewrite the url and inject query parameters, next, it goes through all attachedHandlers
(in the order they were added) trying to find one thatcanHandle
the given request. If none are found, the default(catch-all) handler is attached. - The rest of the request is received, calling the
handleUpload
orhandleBody
methods of theHandler
if they are needed (POST+File/Body) - When the whole request is parsed, the result is given to the
handleRequest
method of theHandler
and is ready to be responded to - In the
handleRequest
method, to theRequest
is attached aResponse
object (see below) that will serve the response data back to the client - When the
Response
is sent, the client is closed and freed from the memory
- The
Rewrites
are used to rewrite the request url and/or inject get parameters for a specific request url path. - All
Rewrites
are evaluated on the request in the order they have been added to the server. - The
Rewrite
will change the request url only if the request url (excluding get parameters) is fully match the rewrite url, and when the optionalFilter
callback return true. - Setting a
Filter
to theRewrite
enables to control when to apply the rewrite, decision can be based on request url, http version, request host/port/target host, get parameters or the request client's localIP or remoteIP. - The
Rewrite
can specify a target url with optional get parameters, e.g./to-url?with=params
- The
Handlers
are used for executing specific actions to particular requests - One
Handler
instance can be attached to any request and lives together with the server - Setting a
Filter
to theHandler
enables to control when to apply the handler, decision can be based on request url, http version, request host/port/target host, get parameters or the request client's localIP or remoteIP. - The
canHandle
method is used for handler specific control on whether the requests can be handled and for declaring any interesting headers that theRequest
should parse. Decision can be based on request method, request url, http version, request host/port/target host and get parameters - Once a
Handler
is attached to givenRequest
(canHandle
returned true) thatHandler
takes care to receive any file/data upload and attach aResponse
once theRequest
has been fully parsed Handlers
are evaluated in the order they are attached to the server. ThecanHandle
is called only if theFilter
that was set to theHandler
return true.- The first
Handler
that can handle the request is selected, not furtherFilter
andcanHandle
are called.
- The
Response
objects are used to send the response data back to the client - The
Response
object lives with theRequest
and is freed on end or disconnect - Different techniques are used depending on the response type to send the data in packets returning back almost immediately and sending the next packet when this one is received. Any time in between is spent to run the user loop and handle other network packets
- Responding asynchronously is probably the most difficult thing for most to understand
- Many different options exist for the user to make responding a background task
- Portenta_H7_AsyncWebServer contains simple template processing engine.
- Template processing can be added to most response types.
- Currently it supports only replacing template placeholders with actual values. No conditional processing, cycles, etc.
- Placeholders are delimited with
%
symbols. Like this:%TEMPLATE_PLACEHOLDER%
. - It works by extracting placeholder name from response text and passing it to user provided function which should return actual value to be used instead of placeholder.
- Since it's user provided function, it is possible for library users to implement conditional processing and cycles themselves.
- Since it's impossible to know the actual response size after template processing step in advance (and, therefore, to include it in response headers), the response becomes chunked.
request->version(); // uint8_t: 0 = HTTP/1.0, 1 = HTTP/1.1
request->method(); // enum: HTTP_GET, HTTP_POST, HTTP_DELETE, HTTP_PUT, HTTP_PATCH, HTTP_HEAD, HTTP_OPTIONS
request->url(); // String: URL of the request (not including host, port or GET parameters)
request->host(); // String: The requested host (can be used for virtual hosting)
request->contentType(); // String: ContentType of the request (not avaiable in Handler::canHandle)
request->contentLength(); // size_t: ContentLength of the request (not avaiable in Handler::canHandle)
request->multipart(); // bool: True if the request has content type "multipart"
//List all collected headers
int headers = request->headers();
int i;
for(i=0;i<headers;i++)
{
AsyncWebHeader* h = request->getHeader(i);
Serial.printf("HEADER[%s]: %s\n", h->name().c_str(), h->value().c_str());
}
//get specific header by name
if(request->hasHeader("MyHeader"))
{
AsyncWebHeader* h = request->getHeader("MyHeader");
Serial.printf("MyHeader: %s\n", h->value().c_str());
}
//List all collected headers (Compatibility)
int headers = request->headers();
int i;
for(i=0;i<headers;i++)
{
Serial.printf("HEADER[%s]: %s\n", request->headerName(i).c_str(), request->header(i).c_str());
}
//get specific header by name (Compatibility)
if(request->hasHeader("MyHeader"))
{
Serial.printf("MyHeader: %s\n", request->header("MyHeader").c_str());
}
//List all parameters
int params = request->params();
for(int i=0;i<params;i++)
{
AsyncWebParameter* p = request->getParam(i);
if(p->isFile())
{
//p->isPost() is also true
Serial.printf("FILE[%s]: %s, size: %u\n", p->name().c_str(), p->value().c_str(), p->size());
}
else if(p->isPost())
{
Serial.printf("POST[%s]: %s\n", p->name().c_str(), p->value().c_str());
}
else
{
Serial.printf("GET[%s]: %s\n", p->name().c_str(), p->value().c_str());
}
}
//Check if GET parameter exists
if(request->hasParam("download"))
AsyncWebParameter* p = request->getParam("download");
//Check if POST (but not File) parameter exists
if(request->hasParam("download", true))
AsyncWebParameter* p = request->getParam("download", true);
//Check if FILE was uploaded
if(request->hasParam("download", true, true))
AsyncWebParameter* p = request->getParam("download", true, true);
//List all parameters (Compatibility)
int args = request->args();
for(int i=0;i<args;i++)
{
Serial.printf("ARG[%s]: %s\n", request->argName(i).c_str(), request->arg(i).c_str());
}
//Check if parameter exists (Compatibility)
if(request->hasArg("download"))
String arg = request->arg("download");
Endpoints which consume JSON can use a special handler to get ready to use JSON data in the request callback:
#include "AsyncJson.h"
#include "ArduinoJson.h"
AsyncCallbackJsonWebHandler* handler = new AsyncCallbackJsonWebHandler("/rest/endpoint", [](AsyncWebServerRequest *request, JsonVariant &json)
{
JsonObject& jsonObj = json.as<JsonObject>();
// ...
});
server.addHandler(handler);
//to local url
request->redirect("/login");
//to external url
request->redirect("http://esp8266.com");
request->send(404); //Sends 404 File Not Found
AsyncWebServerResponse *response = request->beginResponse(404); //Sends 404 File Not Found
response->addHeader("Server","Portenta_H7_AsyncWebServer");
request->send(response);
request->send(200, "text/plain", "Hello World!");
AsyncWebServerResponse *response = request->beginResponse(200, "text/plain", "Hello World!");
response->addHeader("Server","AsyncWebServer");
request->send(response);
//read 12 bytes from Serial and send them as Content Type text/plain
request->send(Serial, "text/plain", 12);
//read 12 bytes from Serial and send them as Content Type text/plain
AsyncWebServerResponse *response = request->beginResponse(Serial, "text/plain", 12);
response->addHeader("Server","Portenta_H7_AsyncWebServer");
request->send(response);
String processor(const String& var)
{
if(var == "HELLO_FROM_TEMPLATE")
return F("Hello world!");
return String();
}
// ...
//read 12 bytes from Serial and send them as Content Type text/plain
request->send(Serial, "text/plain", 12, processor);
String processor(const String& var)
{
if(var == "HELLO_FROM_TEMPLATE")
return F("Hello world!");
return String();
}
// ...
//read 12 bytes from Serial and send them as Content Type text/plain
AsyncWebServerResponse *response = request->beginResponse(Serial, "text/plain", 12, processor);
response->addHeader("Server","Portenta_H7_AsyncWebServer");
request->send(response);
//send 128 bytes as plain text
request->send("text/plain", 128, [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t
{
//Write up to "maxLen" bytes into "buffer" and return the amount written.
//index equals the amount of bytes that have been already sent
//You will not be asked for more bytes once the content length has been reached.
//Keep in mind that you can not delay or yield waiting for more data!
//Send what you currently have and you will be asked for more again
return mySource.read(buffer, maxLen);
});
//send 128 bytes as plain text
AsyncWebServerResponse *response = request->beginResponse("text/plain", 128, [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t
{
//Write up to "maxLen" bytes into "buffer" and return the amount written.
//index equals the amount of bytes that have been already sent
//You will not be asked for more bytes once the content length has been reached.
//Keep in mind that you can not delay or yield waiting for more data!
//Send what you currently have and you will be asked for more again
return mySource.read(buffer, maxLen);
});
response->addHeader("Server","Portenta_H7_AsyncWebServer");
request->send(response);
String processor(const String& var)
{
if(var == "HELLO_FROM_TEMPLATE")
return F("Hello world!");
return String();
}
// ...
//send 128 bytes as plain text
request->send("text/plain", 128, [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t
{
//Write up to "maxLen" bytes into "buffer" and return the amount written.
//index equals the amount of bytes that have been already sent
//You will not be asked for more bytes once the content length has been reached.
//Keep in mind that you can not delay or yield waiting for more data!
//Send what you currently have and you will be asked for more again
return mySource.read(buffer, maxLen);
}, processor);
String processor(const String& var)
{
if(var == "HELLO_FROM_TEMPLATE")
return F("Hello world!");
return String();
}
// ...
//send 128 bytes as plain text
AsyncWebServerResponse *response = request->beginResponse("text/plain", 128, [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t
{
//Write up to "maxLen" bytes into "buffer" and return the amount written.
//index equals the amount of bytes that have been already sent
//You will not be asked for more bytes once the content length has been reached.
//Keep in mind that you can not delay or yield waiting for more data!
//Send what you currently have and you will be asked for more again
return mySource.read(buffer, maxLen);
}, processor);
response->addHeader("Server","Portenta_H7_AsyncWebServer");
request->send(response);
Used when content length is unknown. Works best if the client supports HTTP/1.1
AsyncWebServerResponse *response = request->beginChunkedResponse("text/plain", [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t
{
//Write up to "maxLen" bytes into "buffer" and return the amount written.
//index equals the amount of bytes that have been already sent
//You will be asked for more data until 0 is returned
//Keep in mind that you can not delay or yield waiting for more data!
return mySource.read(buffer, maxLen);
});
response->addHeader("Server","Portenta_H7_AsyncWebServer");
request->send(response);
Used when content length is unknown. Works best if the client supports HTTP/1.1
String processor(const String& var)
{
if(var == "HELLO_FROM_TEMPLATE")
return F("Hello world!");
return String();
}
// ...
AsyncWebServerResponse *response = request->beginChunkedResponse("text/plain", [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t
{
//Write up to "maxLen" bytes into "buffer" and return the amount written.
//index equals the amount of bytes that have been already sent
//You will be asked for more data until 0 is returned
//Keep in mind that you can not delay or yield waiting for more data!
return mySource.read(buffer, maxLen);
}, processor);
response->addHeader("Server","Portenta_H7_AsyncWebServer");
request->send(response);
AsyncResponseStream *response = request->beginResponseStream("text/html");
response->addHeader("Server","Portenta_H7_AsyncWebServer");
response->printf("<!DOCTYPE html><html><head><title>Webpage at %s</title></head><body>", request->url().c_str());
response->print("<h2>Hello ");
response->print(request->client()->remoteIP());
response->print("</h2>");
response->print("<h3>General</h3>");
response->print("<ul>");
response->printf("<li>Version: HTTP/1.%u</li>", request->version());
response->printf("<li>Method: %s</li>", request->methodToString());
response->printf("<li>URL: %s</li>", request->url().c_str());
response->printf("<li>Host: %s</li>", request->host().c_str());
response->printf("<li>ContentType: %s</li>", request->contentType().c_str());
response->printf("<li>ContentLength: %u</li>", request->contentLength());
response->printf("<li>Multipart: %s</li>", request->multipart()?"true":"false");
response->print("</ul>");
response->print("<h3>Headers</h3>");
response->print("<ul>");
int headers = request->headers();
for(int i=0;i<headers;i++)
{
AsyncWebHeader* h = request->getHeader(i);
response->printf("<li>%s: %s</li>", h->name().c_str(), h->value().c_str());
}
response->print("</ul>");
response->print("<h3>Parameters</h3>");
response->print("<ul>");
int params = request->params();
for(int i=0;i<params;i++)
{
AsyncWebParameter* p = request->getParam(i);
if(p->isFile())
{
response->printf("<li>FILE[%s]: %s, size: %u</li>", p->name().c_str(), p->value().c_str(), p->size());
}
else if(p->isPost())
{
response->printf("<li>POST[%s]: %s</li>", p->name().c_str(), p->value().c_str());
}
else
{
response->printf("<li>GET[%s]: %s</li>", p->name().c_str(), p->value().c_str());
}
}
response->print("</ul>");
response->print("</body></html>");
//send the response last
request->send(response);
This way of sending Json is great for when the result is below 4KB
#include "AsyncJson.h"
#include "ArduinoJson.h"
AsyncResponseStream *response = request->beginResponseStream("application/json");
DynamicJsonBuffer jsonBuffer;
JsonObject &root = jsonBuffer.createObject();
root["heap"] = ESP.getFreeHeap();
root["ssid"] = WiFi.SSID();
root.printTo(*response);
request->send(response);
This response can handle really large Json objects (tested to 40KB)
There isn't any noticeable speed decrease for small results with the method above
Since ArduinoJson does not allow reading parts of the string, the whole Json has to be passed every time a chunks needs to be sent, which shows speed decrease proportional to the resulting json packets
#include "AsyncJson.h"
#include "ArduinoJson.h"
AsyncJsonResponse * response = new AsyncJsonResponse();
response->addHeader("Server","AsyncWebServer");
JsonObject& root = response->getRoot();
root["IP"] = Ethernet.localIP();
response->setLength();
request->send(response);
It is possible to rewrite the request url with parameter matchg. Here is an example with one parameter: Rewrite for example "/radio/{frequence}" -> "/radio?f={frequence}"
class OneParamRewrite : public AsyncWebRewrite
{
protected:
String _urlPrefix;
int _paramIndex;
String _paramsBackup;
public:
OneParamRewrite(const char* from, const char* to)
: AsyncWebRewrite(from, to)
{
_paramIndex = _from.indexOf('{');
if( _paramIndex >=0 && _from.endsWith("}"))
{
_urlPrefix = _from.substring(0, _paramIndex);
int index = _params.indexOf('{');
if(index >= 0)
{
_params = _params.substring(0, index);
}
}
else
{
_urlPrefix = _from;
}
_paramsBackup = _params;
}
bool match(AsyncWebServerRequest *request) override
{
if(request->url().startsWith(_urlPrefix))
{
if(_paramIndex >= 0)
{
_params = _paramsBackup + request->url().substring(_paramIndex);
}
else
{
_params = _paramsBackup;
}
return true;
}
else
{
return false;
}
}
};
Usage:
server.addRewrite( new OneParamRewrite("/radio/{frequence}", "/radio?f={frequence}") );
Filters can be set to Rewrite
or Handler
in order to control when to apply the rewrite and consider the handler.
A filter is a callback function that evaluates the request and return a boolean true
to include the item
or false
to exclude it.
Some responses are implemented, but you should not use them, because they do not conform to HTTP. The following example will lead to unclean close of the connection and more time wasted than providing the length of the content
//This is used as fallback for chunked responses to HTTP/1.0 Clients
request->send("text/plain", 0, [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t
{
//Write up to "maxLen" bytes into "buffer" and return the amount written.
//You will be asked for more data until 0 is returned
//Keep in mind that you can not delay or yield waiting for more data!
return mySource.read(buffer, maxLen);
});
The server includes a web socket plugin which lets you define different WebSocket locations to connect to without starting another listening service or using different port
void onEvent(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len)
{
if(type == WS_EVT_CONNECT)
{
//client connected
Serial.printf("ws[%s][%u] connect\n", server->url(), client->id());
client->printf("Hello Client %u :)", client->id());
client->ping();
}
else if(type == WS_EVT_DISCONNECT)
{
//client disconnected
Serial.printf("ws[%s][%u] disconnect: %u\n", server->url(), client->id());
}
else if(type == WS_EVT_ERROR)
{
//error was received from the other end
Serial.printf("ws[%s][%u] error(%u): %s\n", server->url(), client->id(), *((uint16_t*)arg), (char*)data);
}
else if(type == WS_EVT_PONG)
{
//pong message was received (in response to a ping request maybe)
Serial.printf("ws[%s][%u] pong[%u]: %s\n", server->url(), client->id(), len, (len)?(char*)data:"");
}
else if(type == WS_EVT_DATA)
{
//data packet
AwsFrameInfo * info = (AwsFrameInfo*)arg;
if(info->final && info->index == 0 && info->len == len)
{
//the whole message is in a single frame and we got all of it's data
Serial.printf("ws[%s][%u] %s-message[%llu]: ", server->url(), client->id(), (info->opcode == WS_TEXT)?"text":"binary", info->len);
if(info->opcode == WS_TEXT)
{
data[len] = 0;
Serial.printf("%s\n", (char*)data);
}
else
{
for(size_t i=0; i < info->len; i++)
{
Serial.printf("%02x ", data[i]);
}
Serial.printf("\n");
}
if(info->opcode == WS_TEXT)
client->text("I got your text message");
else
client->binary("I got your binary message");
}
else
{
//message is comprised of multiple frames or the frame is split into multiple packets
if(info->index == 0)
{
if(info->num == 0)
Serial.printf("ws[%s][%u] %s-message start\n", server->url(), client->id(), (info->message_opcode == WS_TEXT)?"text":"binary");
Serial.printf("ws[%s][%u] frame[%u] start[%llu]\n", server->url(), client->id(), info->num, info->len);
}
Serial.printf("ws[%s][%u] frame[%u] %s[%llu - %llu]: ", server->url(), client->id(), info->num, (info->message_opcode == WS_TEXT)?"text":"binary", info->index, info->index + len);
if(info->message_opcode == WS_TEXT)
{
data[len] = 0;
Serial.printf("%s\n", (char*)data);
}
else
{
for(size_t i=0; i < len; i++){
Serial.printf("%02x ", data[i]);
}
Serial.printf("\n");
}
if((info->index + len) == info->len)
{
Serial.printf("ws[%s][%u] frame[%u] end[%llu]\n", server->url(), client->id(), info->num, info->len);
if(info->final)
{
Serial.printf("ws[%s][%u] %s-message end\n", server->url(), client->id(), (info->message_opcode == WS_TEXT)?"text":"binary");
if(info->message_opcode == WS_TEXT)
client->text("I got your text message");
else
client->binary("I got your binary message");
}
}
}
}
}
//Server methods
AsyncWebSocket ws("/ws");
//printf to a client
ws.printf((uint32_t)client_id, arguments...);
//printf to all clients
ws.printfAll(arguments...);
//send text to a client
ws.text((uint32_t)client_id, (char*)text);
ws.text((uint32_t)client_id, (uint8_t*)text, (size_t)len);
//send text to all clients
ws.textAll((char*)text);
ws.textAll((uint8_t*)text, (size_t)len);
//send binary to a client
ws.binary((uint32_t)client_id, (char*)binary);
ws.binary((uint32_t)client_id, (uint8_t*)binary, (size_t)len);
ws.binary((uint32_t)client_id, flash_binary, 4);
//send binary to all clients
ws.binaryAll((char*)binary);
ws.binaryAll((uint8_t*)binary, (size_t)len);
//HTTP Authenticate before switch to Websocket protocol
ws.setAuthentication("user", "pass");
//client methods
AsyncWebSocketClient * client;
//printf
client->printf(arguments...);
//send text
client->text((char*)text);
client->text((uint8_t*)text, (size_t)len);
//send binary
client->binary((char*)binary);
client->binary((uint8_t*)binary, (size_t)len);
When sending a web socket message using the above methods a buffer is created. Under certain circumstances you might want to manipulate or populate this buffer directly from your application, for example to prevent unnecessary duplications of the data. This example below shows how to create a buffer and print data to it from an ArduinoJson object then send it.
void sendDataWs(AsyncWebSocketClient * client)
{
DynamicJsonBuffer jsonBuffer;
JsonObject& root = jsonBuffer.createObject();
root["a"] = "abc";
root["b"] = "abcd";
root["c"] = "abcde";
root["d"] = "abcdef";
root["e"] = "abcdefg";
size_t len = root.measureLength();
AsyncWebSocketMessageBuffer * buffer = ws.makeBuffer(len); // creates a buffer (len + 1) for you.
if (buffer)
{
root.printTo((char *)buffer->get(), len + 1);
if (client)
{
client->text(buffer);
}
else
{
ws.textAll(buffer);
}
}
}
Browsers sometimes do not correctly close the websocket connection, even when the close() function is called in javascript. This will eventually exhaust the web server's resources and will cause the server to crash. Periodically calling the cleanClients() function from the main loop() function limits the number of clients by closing the oldest client when the maximum number of clients has been exceeded. This can called be every cycle, however, if you wish to use less power, then calling as infrequently as once per second is sufficient.
void loop(){
ws.cleanupClients();
}
The server includes EventSource (Server-Sent Events) plugin which can be used to send short text events to the browser. Difference between EventSource and WebSockets is that EventSource is single direction, text-only protocol.
AsyncWebServer server(80);
AsyncEventSource events("/events");
void setup()
{
// setup ......
events.onConnect([](AsyncEventSourceClient *client)
{
if(client->lastId())
{
Serial.printf("Client reconnected! Last message ID that it got is: %u\n", client->lastId());
}
//send event with message "hello!", id current millis
// and set reconnect delay to 1 second
client->send("hello!",NULL,millis(),1000);
});
//HTTP Basic authentication
events.setAuthentication("user", "pass");
server.addHandler(&events);
// setup ......
}
void loop()
{
if(eventTriggered){ // your logic here
//send event "myevent"
events.send("my event content","myevent",millis());
}
}
if (!!window.EventSource)
{
var source = new EventSource('/events');
source.addEventListener('open', function(e)
{
console.log("Events Connected");
}, false);
source.addEventListener('error', function(e)
{
if (e.target.readyState != EventSource.OPEN)
{
console.log("Events Disconnected");
}
}, false);
source.addEventListener('message', function(e)
{
console.log("message", e.data);
}, false);
source.addEventListener('myevent', function(e)
{
console.log("myevent", e.data);
}, false);
}
Server goes through handlers in same order as they were added. You can't simple add handler with same path to override them. To remove handler:
// save callback for particular URL path
auto handler = server.on("/some/path", [](AsyncWebServerRequest *request){
//do something useful
});
// when you don't need handler anymore remove it
server.removeHandler(&handler);
// same with rewrites
server.removeRewrite(&someRewrite);
server.onNotFound([](AsyncWebServerRequest *request){
request->send(404);
});
// remove server.onNotFound handler
server.onNotFound(NULL);
// remove all rewrites, handlers and onNotFound/onFileUpload/onRequestBody callbacks
server.reset();
#define USE_ETHERNET_PORTENTA_H7 true
#include <Portenta_Ethernet.h>
#include <Ethernet.h>
#warning Using Portenta_Ethernet lib for Portenta_H7.
#include <Portenta_H7_AsyncWebServer.h>
// Enter a MAC address and IP address for your controller below.
#define NUMBER_OF_MAC 20
byte mac[][NUMBER_OF_MAC] =
{
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x01 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x02 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x03 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x04 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x05 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x06 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x07 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x08 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x09 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x0A },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x0B },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x0C },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x0D },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x0E },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x0F },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x10 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x11 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x12 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x13 },
{ 0xDE, 0xAD, 0xBE, 0xEF, 0x32, 0x14 },
};
// Select the IP address according to your local network
IPAddress ip(192, 168, 2, 232);
AsyncWebServer server(80);
#define LED_OFF HIGH
#define LED_ON LOW
#define BUFFER_SIZE 64
char temp[BUFFER_SIZE];
void handleRoot(AsyncWebServerRequest *request)
{
digitalWrite(LED_BUILTIN, LED_ON);
snprintf(temp, BUFFER_SIZE - 1, "Hello from Async_HelloServer on %s\n", BOARD_NAME);
request->send(200, "text/plain", temp);
digitalWrite(LED_BUILTIN, LED_OFF);
}
void handleNotFound(AsyncWebServerRequest *request)
{
digitalWrite(LED_BUILTIN, LED_ON);
String message = "File Not Found\n\n";
message += "URI: ";
//message += server.uri();
message += request->url();
message += "\nMethod: ";
message += (request->method() == HTTP_GET) ? "GET" : "POST";
message += "\nArguments: ";
message += request->args();
message += "\n";
for (uint8_t i = 0; i < request->args(); i++)
{
message += " " + request->argName(i) + ": " + request->arg(i) + "\n";
}
request->send(404, "text/plain", message);
digitalWrite(LED_BUILTIN, LED_OFF);
}
void setup()
{
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, LED_OFF);
Serial.begin(115200);
while (!Serial);
delay(200);
Serial.print("\nStart Async_HelloServer on "); Serial.print(BOARD_NAME);
Serial.print(" with "); Serial.println(SHIELD_TYPE);
Serial.println(PORTENTA_H7_ASYNC_TCP_VERSION);
Serial.println(PORTENTA_H7_ASYNC_WEBSERVER_VERSION);
///////////////////////////////////
// start the ethernet connection and the server
// Use random mac
uint16_t index = millis() % NUMBER_OF_MAC;
// Use Static IP
//Ethernet.begin(mac[index], ip);
// Use DHCP dynamic IP and random mac
Ethernet.begin(mac[index]);
if (Ethernet.hardwareStatus() == EthernetNoHardware)
{
Serial.println("No Ethernet found. Stay here forever");
while (true)
{
delay(1); // do nothing, no point running without Ethernet hardware
}
}
if (Ethernet.linkStatus() == LinkOFF)
{
Serial.println("Not connected Ethernet cable");
}
Serial.print(F("Using mac index = "));
Serial.println(index);
Serial.print(F("Connected! IP address: "));
Serial.println(Ethernet.localIP());
///////////////////////////////////
server.on("/", HTTP_GET, [](AsyncWebServerRequest * request)
{
handleRoot(request);
});
server.on("/inline", [](AsyncWebServerRequest * request)
{
request->send(200, "text/plain", "This works as well");
});
server.onNotFound(handleNotFound);
server.begin();
Serial.print(F("HTTP EthernetWebServer is @ IP : "));
Serial.println(Ethernet.localIP());
}
void loop(void)
{
}
#include <Arduino.h>
#define USE_ETHERNET_PORTENTA_H7 true
#include <Portenta_Ethernet.h>
#include <Ethernet.h>
#warning Using Portenta_Ethernet lib for Portenta_H7.
#include <Portenta_H7_AsyncWebServer.h>
#include <functional>
...
void handleRequest(AsyncWebServerRequest *request){}
class WebClass
{
public :
AsyncWebServer classWebServer = AsyncWebServer(81);
WebClass(){};
void classRequest (AsyncWebServerRequest *request){}
void begin()
{
// attach global request handler
classWebServer.on("/example", HTTP_ANY, handleRequest);
// attach class request handler
classWebServer.on("/example", HTTP_ANY, std::bind(&WebClass::classRequest, this, std::placeholders::_1));
}
};
AsyncWebServer globalWebServer(80);
WebClass webClassInstance;
void setup()
{
// attach global request handler
globalWebServer.on("/example", HTTP_ANY, handleRequest);
// attach class request handler
globalWebServer.on("/example", HTTP_ANY, std::bind(&WebClass::classRequest, webClassInstance, std::placeholders::_1));
}
void loop()
{
}
// Disable client connections if it was activated
if ( ws.enabled() )
ws.enable(false);
// enable client connections if it was disabled
if ( !ws.enabled() )
ws.enable(true);
In some cases, such as when working with CORS, or with some sort of custom authentication system, you might need to define a header that should get added to all responses (including static, websocket and EventSource). The DefaultHeaders singleton allows you to do this.
Example:
DefaultHeaders::Instance().addHeader("Access-Control-Allow-Origin", "*");
webServer.begin();
NOTE: You will still need to respond to the OPTIONS method for CORS pre-flight in most cases. (unless you are only using GET)
This is one option:
webServer.onNotFound([](AsyncWebServerRequest *request)
{
if (request->method() == HTTP_OPTIONS) {
request->send(200);
} else {
request->send(404);
}
});
With path variable you can create a custom regex rule for a specific parameter in a route.
For example we want a sensorId
parameter in a route rule to match only a integer.
server.on("^\\/sensor\\/([0-9]+)$", HTTP_GET, [] (AsyncWebServerRequest *request)
{
String sensorId = request->pathArg(0);
});
NOTE: All regex patterns starts with ^
and ends with $
To enable the Path variable
support, you have to define the buildflag -DASYNCWEBSERVER_REGEX
.
For Arduino IDE create/update platform.local.txt
:
Windows
: C:\Users(username)\AppData\Local\Arduino15\packages\{espxxxx}
\hardware\espxxxx
\{version}
\platform.local.txt
Linux
: ~/.arduino15/packages/{espxxxx}
/hardware/{espxxxx}
/{version}
/platform.local.txt
Add/Update the following line:
compiler.cpp.extra_flags=-DDASYNCWEBSERVER_REGEX
For platformio modify platformio.ini
:
[env:myboard]
build_flags =
-DASYNCWEBSERVER_REGEX
NOTE: By enabling ASYNCWEBSERVER_REGEX
, <regex>
will be included. This will add an 100k to your binary.
- Async_AdvancedWebServer
- Async_HelloServer
- Async_HelloServer2
- Async_HttpBasicAuth
- Async_PostServer
- MQTTClient_Auth
- MQTTClient_Basic
- MQTT_ThingStream
- WebClient
- WebClientRepeating
- Async_AdvancedWebServer_MemoryIssues_SendArduinoString New
- Async_AdvancedWebServer_MemoryIssues_Send_CString New
- Async_AdvancedWebServer
- Async_HelloServer
- Async_HelloServer2
- Async_HttpBasicAuth
- Async_PostServer
- MQTTClient_Auth
- MQTTClient_Basic
- MQTT_ThingStream
- WebClient
- WebClientRepeating
- Async_AdvancedWebServer_MemoryIssues_Send_CString New
Example Async_AdvancedWebServer
You can access the Async Advanced WebServer @ the server IP
Following is debug terminal output when running example MQTT_ThingStream on PORTENTA_H7_M7 using Ethernet and Portenta_Ethernet Library
Start MQTT_ThingStream on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Portenta_H7_AsyncTCP v1.4.0
Portenta_H7_AsyncWebServer v1.4.0
Using mac index = 17
Connected! IP address: 192.168.2.87
***************************************
STM32_Pub
***************************************
Attempting MQTT connection to broker.emqx.io
...connected
Published connection message successfully!
Subcribed to: STM32_Sub
MQTT Message Send : STM32_Pub => Hello from MQTT_ThingStream on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
MQTT Message receive [STM32_Pub] Hello from MQTT_ThingStream on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
MQTT Message Send : STM32_Pub => Hello from MQTT_ThingStream on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
MQTT Message receive [STM32_Pub] Hello from MQTT_ThingStream on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Following is debug terminal output when running example WebClient on on PORTENTA_H7_M7 using Ethernet and Portenta_Ethernet Library
Start WebClientRepeating on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Portenta_H7_AsyncTCP v1.4.0
Portenta_H7_AsyncWebServer v1.4.0
Using mac index = 16
Connected! IP address: 192.168.2.87
Connecting...
HTTP/1.1 200 OK
Server: nginx/1.4.2
Date: Thu, 07 Oct 2021 05:16:59 GMT
Content-Type: text/plain
Content-Length: 2263
Last-Modified: Wed, 02 Oct 2013 13:46:47 GMT
Connection: close
Vary: Accept-Encoding
ETag: "524c23c7-8d7"
Accept-Ranges: bytes
`:;;;,` .:;;:.
.;;;;;;;;;;;` :;;;;;;;;;;: TM
`;;;;;;;;;;;;;;;` :;;;;;;;;;;;;;;;
:;;;;;;;;;;;;;;;;;; `;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;;;;;; .;;;;;;;;;;;;;;;;;;;;
;;;;;;;;:` `;;;;;;;;; ,;;;;;;;;.` .;;;;;;;;
.;;;;;;, :;;;;;;; .;;;;;;; ;;;;;;;
;;;;;; ;;;;;;; ;;;;;;, ;;;;;;.
,;;;;; ;;;;;;.;;;;;;` ;;;;;;
;;;;;. ;;;;;;;;;;;` ``` ;;;;;`
;;;;; ;;;;;;;;;, ;;; .;;;;;
`;;;;: `;;;;;;;; ;;; ;;;;;
,;;;;` `,,,,,,,, ;;;;;;; .,,;;;,,, ;;;;;
:;;;;` .;;;;;;;; ;;;;;, :;;;;;;;; ;;;;;
:;;;;` .;;;;;;;; `;;;;;; :;;;;;;;; ;;;;;
.;;;;. ;;;;;;;. ;;; ;;;;;
;;;;; ;;;;;;;;; ;;; ;;;;;
;;;;; .;;;;;;;;;; ;;; ;;;;;,
;;;;;; `;;;;;;;;;;;; ;;;;;
`;;;;;, .;;;;;; ;;;;;;; ;;;;;;
;;;;;;: :;;;;;;. ;;;;;;; ;;;;;;
;;;;;;;` .;;;;;;;, ;;;;;;;; ;;;;;;;:
;;;;;;;;;:,:;;;;;;;;;: ;;;;;;;;;;:,;;;;;;;;;;
`;;;;;;;;;;;;;;;;;;;. ;;;;;;;;;;;;;;;;;;;;
;;;;;;;;;;;;;;;;; :;;;;;;;;;;;;;;;;:
,;;;;;;;;;;;;;, ;;;;;;;;;;;;;;
.;;;;;;;;;` ,;;;;;;;;:
;;; ;;;;;` ;;;;: .;; ;; ,;;;;;, ;;. `;, ;;;;
;;; ;;:;;; ;;;;;; .;; ;; ,;;;;;: ;;; `;, ;;;:;;
,;:; ;; ;; ;; ;; .;; ;; ,;, ;;;,`;, ;; ;;
;; ;: ;; ;; ;; ;; .;; ;; ,;, ;;;;`;, ;; ;;.
;: ;; ;;;;;: ;; ;; .;; ;; ,;, ;;`;;;, ;; ;;`
,;;;;; ;;`;; ;; ;; .;; ;; ,;, ;; ;;;, ;; ;;
;; ,;, ;; .;; ;;;;;: ;;;;;: ,;;;;;: ;; ;;, ;;;;;;
;; ;; ;; ;;` ;;;;. `;;;: ,;;;;;, ;; ;;, ;;;;
Following is debug terminal output when running example MQTTClient_Auth on on PORTENTA_H7_M7 using Ethernet and Portenta_Ethernet Library
Start MQTTClient_Auth on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Portenta_H7_AsyncTCP v1.4.0
Portenta_H7_AsyncWebServer v1.4.0
Using mac index = 9
Connected! IP address: 192.168.2.87
Attempting MQTT connection to broker.emqx.io...connected
Message Send : MQTT_Pub => Hello from MQTTClient_Auth on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Message arrived [MQTT_Pub] Hello from MQTTClient_Auth on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Message Send : MQTT_Pub => Hello from MQTTClient_Auth on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Message arrived [MQTT_Pub] Hello from MQTTClient_Auth on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Message Send : MQTT_Pub => Hello from MQTTClient_Auth on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Message arrived [MQTT_Pub] Hello from MQTTClient_Auth on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Following is debug terminal output when running example MQTTClient_Basic on on PORTENTA_H7_M7 using Ethernet and Portenta_Ethernet Library
Start MQTTClient_Basic on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Portenta_H7_AsyncTCP v1.4.0
Portenta_H7_AsyncWebServer v1.4.0
Using mac index = 8
Connected! IP address: 192.168.2.87
Attempting MQTT connection to broker.emqx.io...connected
Message Send : MQTT_Pub => Hello from MQTTClient_Basic on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Message arrived [MQTT_Pub] Hello from MQTTClient_Basic on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Message Send : MQTT_Pub => Hello from MQTTClient_Basic on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Message arrived [MQTT_Pub] Hello from MQTTClient_Basic on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Following is debug terminal output when running example Async_HTTPBasicAuth on PORTENTA_H7_M7 using Ethernet and Portenta_Ethernet Library
Start Async_HTTPBasicAuth on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Portenta_H7_AsyncTCP v1.4.0
Portenta_H7_AsyncWebServer v1.4.0
Using mac index = 16
Connected! IP address: 192.168.2.87
Async_HttpBasicAuth started @ IP : 192.168.2.87
Open http://192.168.2.87/ in your browser to see it working
Login using username = admin and password = ethernet
[AWS] getMD5: Success
[AWS] genRandomMD5: res = 795d0e2e77f0bd1ac56d88a223e30cc8
[AWS] getMD5: Success
[AWS] genRandomMD5: res = 0bc073c1bf61fa0ae678fa5892cfd2a6
[AWS] requestDigestAuthentication: header = realm="asyncesp", qop="auth", nonce="795d0e2e77f0bd1ac56d88a223e30cc8", opaque="0bc073c1bf61fa0ae678fa5892cfd2a6"
[AWS] getMD5: Success
[AWS] stringMD5: res = 9384b554a02515c9481a13b3787821da
[AWS] getMD5: Success
[AWS] stringMD5: res = 71998c64aea37ae77020c49c00f73fa8
[AWS] getMD5: Success
[AWS] stringMD5: res = 5908212c923b4d99fd278772873a142f
[AWS] AUTH SUCCESS
Following are debug terminal output and screen shots when running example Async_AdvancedWebServer on PORTENTA_H7_M7 using Ethernet and Portenta_Ethernet Library to demonstrate the complex AsyncWebServer feature.
Start Async_AdvancedWebServer on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Portenta_H7_AsyncTCP v1.4.0
Portenta_H7_AsyncWebServer v1.4.0
Using mac index = 4
Connected! IP address: 192.168.2.87
HTTP EthernetWebServer is @ IP : 192.168.2.87
You can access the Async Advanced WebServers at the displayed server IP, e.g. 192.168.2.87
Following is the debug terminal and screen shot when running example Async_AdvancedWebServer on Portenta_H7 WiFi to demonstrate the operation of Portenta_H7_AsyncWebServer, based on this Portenta_H7_AsyncTCP Library.
Start Async_AdvancedWebServer on PORTENTA_H7_M7 with Portenta_H7 WiFi
Portenta_H7_AsyncTCP v1.4.0
Portenta_H7_AsyncWebServer v1.4.0
Connecting to SSID: HueNet1
SSID: HueNet1
Local IP Address: 192.168.2.94
signal strength (RSSI):-31 dBm
HTTP EthernetWebServer is @ IP : 192.168.2.94
..........
You can access the Async Advanced WebServers at the displayed server IP, e.g. 192.168.2.94
Following is the debug terminal and screen shot when running example Async_AdvancedWebServer_MemoryIssues_Send_CString on Portenta_H7 Ethernet to demonstrate the new and powerful HEAP-saving
feature
Start Async_AdvancedWebServer_MemoryIssues_Send_CString using SDRAM on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Portenta_H7_AsyncTCP v1.4.0
Portenta_H7_AsyncWebServer v1.4.0
Using mac index = 2
Connected! IP address: 192.168.2.123
HTTP EthernetWebServer is @ IP : 192.168.2.123
HEAP DATA - Pre Create Arduino String Cur heap: 8458 Res Size: 451648 Max heap: 8472
.
HEAP DATA - Pre Send Cur heap: 9634 Res Size: 451648 Max heap: 10196
HEAP DATA - Post Send Cur heap: 9734 Res Size: 451648 Max heap: 12847
......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31200
.......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31219
.......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31255
.......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31198
.......... .......... .......... .......... .......... .......... .......... ........
HEAP DATA - Post Send Cur heap: 11201 Res Size: 451648 Max heap: 14314
..
Out String Length=31224
.......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31235
Start Async_AdvancedWebServer_MemoryIssues_Send_CString on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Portenta_H7_AsyncTCP v1.4.0
Portenta_H7_AsyncWebServer v1.4.0
Using mac index = 8
Connected! IP address: 192.168.2.123
HTTP EthernetWebServer is @ IP : 192.168.2.123
HEAP DATA - Pre Create Arduino String Cur heap: 47434 Res Size: 451760 Max heap: 47448
.
HEAP DATA - Pre Send Cur heap: 48610 Res Size: 451760 Max heap: 49172
HEAP DATA - Post Send Cur heap: 48710 Res Size: 451760 Max heap: 51823
......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31200
.......... .......... .......... .......... .......... .......... .......... ..........
Out String Length=31291
While using Arduino String, the HEAP usage is very large
Start Async_AdvancedWebServer_MemoryIssues_SendArduinoString on PORTENTA_H7_M7 with Ethernet using Portenta_Ethernet Library
Portenta_H7_AsyncTCP v1.4.0
Portenta_H7_AsyncWebServer v1.4.0
Using mac index = 0
Connected! IP address: 192.168.2.123
HTTP EthernetWebServer is @ IP : 192.168.2.123
HEAP DATA - Pre Create Arduino String Cur heap: 7434 Res Size: 452016 Max heap: 7448
.
HEAP DATA - Pre Send Cur heap: 48611 Res Size: 452016 Max heap: 48611
HEAP DATA - Post Send Cur heap: 79009 Res Size: 452016 Max heap: 111347
.
HEAP DATA - Post Send Cur heap: 79029 Res Size: 452016 Max heap: 111387
...
HEAP DATA - Post Send Cur heap: 79037 Res Size: 452016 Max heap: 111403
....
HEAP DATA - Post Send Cur heap: 79041 Res Size: 452016 Max heap: 111411
. ..
Out String Length=31247
.......
HEAP DATA - Post Send Cur heap: 79047 Res Size: 452016 Max heap: 111423
. ....
Out String Length=31233
...... ......
Out String Length=31243
.... .......
Out String Length=31251
... .......
HEAP DATA - Post Send Cur heap: 79054 Res Size: 452016 Max heap: 111437
..
Out String Length=31280
. ......
You can access the Async Advanced WebServers at the displayed server IP, e.g. 192.168.2.123
Debug is enabled by default on Serial.
You can also change the debugging level _PORTENTA_H7_AWS_LOGLEVEL_
from 0 to 4 in the library cpp
files
#define _PORTENTA_H7_AWS_LOGLEVEL_ 1
If you get compilation errors, more often than not, you may need to install a newer version of Arduino IDE, the Arduino mbed_portenta
core or depending libraries.
Sometimes, the library will only work if you update the mbed_portenta
core to the latest version because I'm always using the latest cores /libraries.
Submit issues to: Portenta_H7_AsyncWebServer issues
- Fix bug. Add enhancement
- Add support to
Murata
WiFi
- Add support to Portenta_H7 using
Vision-shield Ethernet
- Add Table of Contents
- Fix issue with slow browsers or network. Check Target stops responding after variable time when using Firefox on Windows 10 #3
- Support using
CString
in optionalSDRAM
to save heap to sendvery large data
. Check request->send(200, textPlainStr, jsonChartDataCharStr); - Without using String Class - to save heap #8
- Based on and modified from Hristo Gochkov's ESPAsyncWebServer. Many thanks to Hristo Gochkov for great ESPAsyncWebServer Library
- Thanks to rusty-bit to initiate the Discussion in AsyncWebserver for Portenta H7 #6 leading to these Portenta_H7_AsyncTCP and Portenta_H7_AsyncWebServer libraries
- Thanks to Jeremy Ellis to test and report the compile error and crash issue with mbed_portenta core v2.6.1, leading to v1.2.0
- Thanks to salasidis aka rs77can to discuss and make the mavellous PR request->send(200, textPlainStr, jsonChartDataCharStr); - Without using String Class - to save heap #8, leading to
v1.4.0
to support usingCString
in optionalSDRAM
to save heap to sendvery large data
![]() ⭐️⭐️ Hristo Gochkov |
![]() rusty-bit |
![]() Jeremy Ellis |
![]() ⭐️ salasidis |
If you want to contribute to this project:
- Report bugs and errors
- Ask for enhancements
- Create issues and pull requests
- Tell other people about this library
- The library is licensed under GPLv3
Copyright 2021- Khoi Hoang