I followed these instructions to convert RAK4631 to RAK3631-R
Here is my windows 10 powershell output:
C:\Users\user\Downloads\flash4631> ./adafruit-nrfutil.exe --verbose dfu serial --package rui3_nrf52840_bootloader_latest.zip --port COM7 -b 115200 --singlebank --touch 1200
Upgrading target on COM7 with DFU package C:\Users\user\Downloads\flash4631\rui3_nrf52840_bootloader_latest.zip. Flow control is disabled, Single bank, Touch 1200
Touched serial port COM7
Opened serial port COM7
Starting DFU upgrade of type 2, SoftDevice size: 0, bootloader size: 36184, application size: 0
Sending DFU start packet
Sending DFU init packet
Sending firmware file
########################################
###############################
Activating new firmware
DFU upgrade took 2.651463747024536s
Device programmed.
PS C:\Users\user\Downloads\flash4631> ./nrfutil.exe dfu serial -pkg rui3_rak4631_latest.zip -p COM10
[####################################] 100%
Device programmed.
Now, I am stuck with AT command not working. I have tried Tera Term and RAK_SERIAL_PORT_TOOL_V1.2.1 none seems working and I cannot reverse back to RAK4631!
Also I noticed that double click the reset button doesn’t make a new drive, it just restart the device I guess.
Any suggestion is appreciated
AB