Note: Skip this section if you have a V188.8.131.52 RAK811 Firmware or newer, for it has a bootloader preloaded already.
Burn the latest firmware #
1.Download the latest firmware here in order to avoid potential problems.
2.To start with the firmware burning, download and install the STM32CubeProgrammer tool here
3.Bridge the “BOOT” pin and “3V3” pin to set the board in boot mode as shown in the image below:
4.Choose the correct port number in the COM Port field. You can check this in the Device Manager. You can also check this document on how to properly interface your RAK811 LoRa® Evaluation Board with your Computer.
4.Open the “STM32CubeProgrammer” tool.
5.Select UART type; go to COM Port and look for your RAK811 LoRa® Evaluation Board COM Port (ex. COM5).
6.Configure the Baud Rate and Parity.
7.Then, press the “Connect” button at the top right corner.
Note: If there are some errors in the Log box or it can’t connect, just close SMT32Cubeprogrammer, and reinsert the RAK811 LoRa® Evaluation Board again and reopen the SMT32Cubeprogrammer and connect.
Now, let’s start burning the bootloader into the RAK811 LoRa® Evaluation Board.
8.First, ERASE all data on the RAK811 LoRa® Evaluation Board referred from the following picture below:
9.Press “Open file” and select the bootloader file in the pop-up window.
10.Click the “Download” button to start the burning process.
11.OK, you have burned the firmware into RAK811 LoRa® Evaluation Board successfully!
12."Disconnect” and close the “STM32CubeProgrammer” tool. Remove the jump in the “BOOT” and “3V3” pins and transfer it to the “BOOT” pin and the “GND” as shown in the image below:.
13.Pull out and reinsert the USB interface into your PC. If you have opened the serial port tool, you can see some content like this:
Alright! You can now start burning the upgraded firmware into the RAK811 LoRa® Evaluation Board.