Fixing LED state (#471)

Red - when device is not connected to the app.
Blue - when device is connected to the app.


https://github.com/user-attachments/assets/91bd37ac-b8d1-4e65-9ab4-c1e5c86beb53

firmware/firmware_v1.0/src/main.c

@@ -25,6 +25,44 @@ void bt_ctlr_assert_handle(char *name, int type)
 	}
 }
 
+bool is_connected = false;
+bool is_charging = false;
+
+void set_led_state()
+{
+	// Recording and connected state - BLUE
+	if (is_connected)
+	{
+		set_led_red(false);
+		set_led_green(false);
+		set_led_blue(true);
+		return;
+	}
+
+	// Recording but lost connection - RED
+	if (!is_connected)
+	{
+		set_led_red(true);
+		set_led_green(false);
+		set_led_blue(false);
+		return;
+	}
+
+	// Not recording, but charging - WHITE
+	if (is_charging)
+	{
+		set_led_red(true);
+		set_led_green(true);
+		set_led_blue(true);
+		return;
+	}
+
+	// Not recording - OFF
+	set_led_red(false);
+	set_led_green(false);
+	set_led_blue(false);
+}
+
 // Main loop
 int main(void)
 {
@@ -43,16 +81,11 @@ int main(void)
 	set_mic_callback(mic_handler);
 	ASSERT_OK(mic_start());
 
-	// Blink LED
-	bool is_on = true;
-	set_led_blue(false);
-	set_led_red(is_on);
-	// while (1)
-	// {
-	// 	is_on = !is_on;
-	// 	set_led_red(is_on);
-	// 	k_msleep(500);
-	// }
+	while (1)
+	{
+		set_led_state();
+		k_msleep(500);
+	}
 
 	// Unreachable
 	return 0;

firmware/firmware_v1.0/src/transport.c

@@ -14,6 +14,8 @@
 #include "btutils.h"
 #include "lib/battery/battery.h"
 
+extern bool is_connected;
+
 //
 // Internal
 //
@@ -207,10 +209,14 @@ static void _transport_connected(struct bt_conn *conn, uint8_t err)
     printk("LE data len updated: TX (len: %d time: %d) RX (len: %d time: %d)\n", info.le.data_len->tx_max_len, info.le.data_len->tx_max_time, info.le.data_len->rx_max_len, info.le.data_len->rx_max_time);
 
     k_work_schedule(&battery_work, K_MSEC(BATTERY_REFRESH_INTERVAL));
+
+    is_connected = true;
 }
 
 static void _transport_disconnected(struct bt_conn *conn, uint8_t err)
 {
+    is_connected = false;
+
     printk("Disconnected\n");
     bt_conn_unref(conn);
     current_connection = NULL;

firmware/readme.md

@@ -4,54 +4,25 @@
 pip3 install --user adafruit-nrfutil
 ```
 
-### Upgrade bootloader using adafruit-nrfutil
+### Create firmware OTA .zip using adafruit-nrfutil
 
-Download a compatible version of the ```xiao_nrf52840_ble_sense_bootloader-``` bootloader
-from [Adafurit bootloader releases](https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases)
-The minimum version required is 0.8.0.
-
-Put the board in bootloader mode by double pressing the reset button.
-Check the serial port for the board and modify the command below accordingly.
-
-```
-adafruit-nrfutil dfu serial -p COM8 -pkg xiao_nrf52840_ble_sense_bootloader-0.8.0_s140_7.3.0.zip
-```
-
-### Upgrade firmware using adafruit-nrfutil
-
-Put the board in bootloader mode by double pressing the reset button.
-Check the serial port for the board and modify the command below accordingly.
-
-```
+```bash
 adafruit-nrfutil dfu genpkg --dev-type 0x0052 --dev-revision 0xCE68 --application zephyr.hex zephyr.zip
-adafruit-nrfutil dfu serial -p COM8 -pkg zephyr.zip
 ```
 
-You can also use the Nordic nRF Connect app to upgrade the bootloader and firmware. Make sure
-to change the PRN option from the default of 12 to 8.
-
-### Create firmware UF2 file
+### Upgrade firmware using UF2 file
 
-You need the uf2conv.py script to convert the hex file to a uf2 file. You can find the script in the Adafruit
-bootloader repository. The script is located in the ```lib/uf2/utils``` directory.
-Alternatively, you can get the script from the Microsoft UF2 repository.
-
-```bash
-git clone https://github.com/adafruit/Adafruit_nRF52_Bootloader
-cd Adafruit_nRF52_Bootloader
-git submodule update --init
-cd lib\uf2\utils
-```
+Download the latest version of the firmware ```xiao_nrf52840_ble_sense-XXXX.uf2```
+from [Friend firmware releases](https://github.com/BasedHardware/Friend/releases)
 
-To create UF2 file with the application hex file, run the following command:
+Put the board in bootloader mode by double pressing the reset button. The board should appear as a USB drive.
 
-```bash
-python c:\src\Adafruit_nRF52_Bootloader\lib\uf2\utils\uf2conv.py --convert --family 0xADA52840 --output friend-1.0.2.uf2 firmware_v1.0\build\zephyr\zephyr.hex
-```
+Copy the new firmware file in the root directory of the board. The board will automatically update the firmware and reset back to application mode.
+You can check the firmware version from the Friend companion app.
 
 ### Upgrade bootloader using UF2 file
 
-Download a compatible version of the ```update-xiao_nrf52840_ble_sense_bootloader-``` bootloader
+Download a compatible version of the ```update-xiao_nrf52840_ble_sense_bootloader-XXX.uf2``` bootloader
 from [Adafurit bootloader releases](https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases)
 The latest tested version is 0.9.0. Newer versions should work as well.