DevNonce is too small : BUG

[askmurphy]

Hello, found a bug with the "LilyGO TTGO T-Beam - LoRa 868MHz - NEO-M8N GPS". If I use radiolib and compile the RadioLib LoRaWAN Starter Example with the correct LoRawan keys and create the relevant LoRa sensor at TTN, it all works fine: the data arrives neatly at TTN. But as soon as I disconnect the T-Beam from the power and connect it again after 5 minutes, I no longer have a connection with TTN: I get this error message on the TTN console: "DevNonce is too small". Also a DevNonce reset on the TTN panel does not help. It only works if I remove the device from the TTN panel and recreate it. This is quite clumsy and uncooperative. Hope this can be resolved soon ;-)

BUT: when I enable RESET USED DEVNONCES then I can re-join and it works again?

Additional info:

• LilyGO TTGO T-Beam - LoRa 868MHz - NEO-M8N GPS"
• Wireless module type SX1276
• Arduino IDE version 2.3.2 (Windows 11)
• Library version: latest

[StevenCellist]

Hi @askmurphy, please refer to the README in the LoRaWAN examples folder for information on this. There you will find an explanation and links to sketches that will resolve this problem for you.

And FYI: the 'reset' button on the TTN console doesn't do anything. Only checking the "Resets DevNonces" box resolves that problem. But is not what should happen on LoRaWAN v1.1. So refer to previous sketch please.

[askmurphy]

Ok, will check this tomorrow. Thanks!

[askmurphy]

hello again,
tested it again with the new esp32 example in the github folder you mentioned above.
New device created in TTN, first Join ok.
Powered off the device, waited for 5 minutes and powered it on again: same trouble.. No connection.

`etup
Wake not caused by deep sleep: 0
Boot count: 1
Initalise the radio
Recalling LoRaWAN nonces & session
Restoring nonces buffer failed(-1119)
Join ('login') to the LoRaWAN Network
Saving nonces to flash
Join failed: -1116
Boots since unsuccessful join: 1
Retrying join in 60 seconds
Sleeping

ets Jul 29 2019 12:21:46

`

[askmurphy]

Just curious, why are there 2 different version of the radiolib examples?
One which has the nonces issue and the last one without (not working here I am afraid..) ?
It's confusing...

[StevenCellist]

Just curious, why are there 2 different version of the radiolib examples?

That is explained in the README I linked earlier. The implementation is different for all platforms, and thus difficult to keep up to date in RadioLib itself.

New device created in TTN, first Join ok.

Please provide the logs created by your device upon the first boot, with RADIOLIB_DEBUG_PROTOCOL enabled in BuildOptUser.h. And then also the debug logs from the second boot. Then I can see if there is a mistake in the examples or in your usage.

[askmurphy]

Ok, I have tested it again. Double checked correct radiolib version v6.6.0 and example https://github.com/radiolib-org/radiolib-persistence/tree/main/examples/LoRaWAN_ESP32 (maybe I had still the wrong example the previous test??)

RADIOLIB_DEBUG_PROTOCOL enabled in BuildOptUser.h also.

Created new device at TTN, compiled, joined and 1st time: it works great again.
Powered off the device and powered on again after a few minutes, no errors anymore. Seems to be it works ;-)

firstboot_log.txt
secondboot.txt

So, it seems to be ok ;-)

Maybe an idea to make a TTN sub-folder in the examples-folder from your nice Library?
It's a bit confusing now for some.

I will rewrite the software of my little Pond-device (https://github.com/askmurphy/Lora-pH-temperature-sensor) using your library now.

Many thanks for your help and keep on the good work, really appreciated !!!!!!!!!!!

[StevenCellist]

Awesome, looks all good.

I agree that the split in the examples may be a bit confusing, but it has been a topic of discussion before and we settled on the current solution.. not completely perfect but best maintainable.

Veel succes verder ;)

[askmurphy]

hello again,
Tried today the T-Beam again with the above code, after uploading the software I have the DevNonce trouble again.
Not sure what's happend the last 2 weeks but it doesn't work now.

Saving nonces to flash
Join failed: -1116
Boots since unsuccessful join: 1
Retrying join in 60 seconds
Sleeping

ets Jul 29 2019 12:21:46

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:1288
load:0x40078000,len:13872
load:0x40080400,len:4
ho 8 tail 4 room 4
load:0x40080404,len:3048

[askmurphy]

Time
Type
Data preview
Verbose stream

    arrow_upward
    20:30:00
    Join-request to cluster-local Join Server failed
    DevNonce is too small
    arrow_upward
    20:28:22
    Join-request to cluster-local Join Server failed
    DevNonce is too small
    arrow_upward
    20:25:43
    Join-request to cluster-local Join Server failed
    DevNonce is too small
    info
    20:25:21
    Stream reconnected
    The stream connection has been re-established
    info
    20:25:16
    Stream connection closed
    The connection was closed
    arrow_upward
    20:22:35
    Join-request to cluster-local Join Server failed
    DevNonce is too small
    arrow_upward
    20:19:28
    Join-request to cluster-local Join Server failed
    DevNonce is too small
    arrow_upward
    20:16:20
    Join-request to cluster-local Join Server failed
    DevNonce is too small
    arrow_upward
    20:14:12
    Join-request to cluster-local Join Server failed
    DevNonce is too small
    arrow_upward
    20:13:04
    Join-request to cluster-local Join Server failed
    DevNonce is too small
    clear_all
    20:06:23
    Events cleared
    The events list has been cleared

[askmurphy]

Tested this with the Arduino IDE, also with Visual Studio: same troubles.

[StevenCellist]

If you used the T-Beam for other sketches/programs or erased the flash for whatever reason, the DevNonces are likely lost. In that case you need to reset the used DevNonces on your LoRaWAN Network Server.

[askmurphy]

Have tried that a few times, didn't work.
So, I have removed the device in the TTN console and created it again: now it works again.
2 tests: first with Arduino IDE, compiled and uploaded: TTN Lora connection succesfull.
2nd test: same Lora keys but different program (Visual Studio code): works too.
Weird... What is DevNonces and why did they make it this way, seems a but buggy...

[askmurphy]

Does anyone have an example of a simple radiolib (LoRaWan) code with the following:

• no deep sleep function (it's an adapter powered sensor, which has also a display to show the actual temperature and pH).
• using CayenneLPP to send the temperature and pH value every 5 minutes to TTN

I did a test with the ESP32 demo and replaced the random code to send to LoRaWan with this:

CayenneLPP lpp(51); 
lpp.reset(); // Reset of the object CayenneLPP
lpp.addTemperature(1, 25); 
state = node.sendReceive(lpp.getBuffer(), lpp.getSize());     

I got this first as a result: "downlink transmission failed with result: TOO_EARLY"
But later I got the correct Cayenne payload ;-)

So, the above seem to work. But if it's the correct way to do it, not sure. Anyone who can help a bit?

[StevenCellist]

@askmurphy this is a question that is completely unrelated to this topic (it isn't even an issue now); please open a Discussion for this.