Docs: STM32 firmware update

Author: nseidle

docs/firmware_update_stm32.md

@@ -2,35 +2,61 @@
 
 Torch: ![Feature Supported](img/Icons/GreenDot.png) / EVK: ![Feature Not Supported](img/Icons/RedDot.png)
 
-The STM32WLE firmware runs the 915MHz LoRa radio inside the RTK Torch. The firmware version number is displayed in the radio menu:
+The STM32WLE firmware runs the 915MHz LoRa radio inside the RTK Torch. 
 
-![RTK Express with firmware v3.0](<img/Displays/SparkFun%20RTK%20Boot%20Screen%20Version%20Number.png>)
+![Menu showing firmware version 2.0.1](<img/Firmware/SparkFun RTK Everywhere - STM32 Firmware.png>)
 
 *RTK Torch LoRa radio firmware version 2.0.1*
 
+The firmware version number is displayed in the radio menu. If the device does not show this menu option the [ESP32 firmware](firmware_update_esp32.md) will need to be updated first.
+
 Firmware updates to the STM32WLE can only be done over the serial interface. Follow these steps to update the LoRa radio firmware on the RTK Torch.
 
    ![UI of STM32CubeProgrammer](<img/Firmware/SparkFun RTK Everywhere - STM32CubeProgrammer.png>)
 
 1. Download and install [STM32CubeProgrammer](https://www.st.com/en/development-tools/stm32cubeprog.html). While it *is* available for Windows/Linux/iOS, ST makes it rather difficult to get this software. We're sorry!
 
+
+2. Download the latest STM32 LoRa binary from the [RTK Everywhere Firmware Binaries](https://github.com/sparkfun/SparkFun_RTK_Everywhere_Firmware_Binaries/tree/main/STM32_LoRa) repo. As of writing, this is **RTK_Torch_STM32_LoRa_v2_0_1.bin**.
+
     ![Debug menu showing the STM32 direct connect option](<img/Firmware/SparkFun RTK Everywhere - STM32 Passthrough Menu.png>)
 
-2. Open the main menu and select System (**s**), Hardware Debug (**h**), STM32 direct connect (**17**).
+3. Open the main menu and select System (**s**), Hardware Debug (**h**), STM32 direct connect (**17**).
 
    ![Passthrough mode output on reset](<img/Firmware/SparkFun RTK Everywhere - STM32 Passthrough 1.png>)
 
-3. The device will automatically reset and show very little including various symbols. The device is now operating in pass-through mode at 57600bps, and ready to be programmed. If needed, to exit this pass-through mode, press and release the main power button.
+4. The device will automatically reset and show instructions. The device is now operating in pass-through mode at 57600bps, and ready to be programmed. If needed, to exit this pass-through mode, press and release the main power button.
 
-4. Close the terminal connection. This will likely cause the device to reset - that is ok.
+5. Close the terminal connection. This will likely cause the device to reset - that is ok.
 
    ![Settings in STM32CubeProgrammer](<img/Firmware/SparkFun RTK Everywhere - STM32CubeProgrammer Callouts.png>)
 
-5. Open STM32CubeProgrammer. Select UART (blue box) and the programming interface. Set the Baudrate to 57600, No parity, RTS and DTR set to high.
+6. Open STM32CubeProgrammer. Select UART (blue box) and the programming interface. Set the Baudrate to 57600, No parity, RTS and DTR set to high.
 
    ![Don't select Read Unprotected](<img/Firmware/SparkFun RTK Everywhere - STM32CubeProgrammer Read Unprotected.png>)
 
-6. Avoid **Read Unprotected**. Do not enable. This setting writes to fuse bits and if there is a problem with serial communication, it can lead to an inoperable bootloader. The device can be repaired but only at SparkFun (we have to use a ST-Link to reprogram the fust bits over the SWD interface).
+7. Avoid **Read Unprotected**. Do not enable. This setting writes to fuse bits and if there is a problem with serial communication, it can lead to an inoperable bootloader. The device can be repaired but only at SparkFun (we have to use an ST-Link to reprogram the fuse bits over the SWD interface).
+
+8. Select the COM port associated with COM-B of the RTK device. Not sure? Read [here](https://docs.sparkfun.com/SparkFun_RTK_Everywhere_Firmware/configure_with_serial/#rtk-torch). Once selected, click **Connect**.
+
+    ![Connected to STM32](<img/Firmware/SparkFun RTK Everywhere - STM32CubeProgrammer Connected.png>)
+
+9. Once connected, select *Erasing & programming* on the left side menu.
+
+    ![Programming button in STM32CubeProgrammer](<img/Firmware/SparkFun RTK Everywhere - STM32CubeProgrammer Program.png>)
+
+10. Select the binary file and click *Start Programming*.
+
+    ![Programming complete confirmation](<img/Firmware/SparkFun RTK Everywhere - STM32CubeProgrammer Program Complete.png>)
+
+11. After a few seconds, programming will complete. 
+
+    ![Disconnect button](<img/Firmware/SparkFun RTK Everywhere - STM32CubeProgrammer Disconnect.png>)
+
+12. Click disconnect to close the port.
+
+13. Now press and release the power button on the Torch. The device will beep indicating it has exited pass-through mode. You can now use your device normally.
 
-7. Select the COM port associated with COM-B of the RTK device. Not sure? Read [here](https://docs.sparkfun.com/SparkFun_RTK_Everywhere_Firmware/configure_with_serial/#rtk-torch). Once selected, click **Connect**.
+    ![Menu showing firmware version 2.0.1](<img/Firmware/SparkFun RTK Everywhere - STM32 Firmware.png>)
 
+14. To confirm the version, open the Radio menu and enable the radio. Above, version 2.0.1 is seen.