Failed to Program Default Firmware with STLINK-V3

jackyruth · November 9, 2022, 9:19pm

Hi all,

I used the STLINK-V3 SWD pins to program the default firmware.

The programming was successful, however, when I send ‘at’ to it, it no longer responds with ‘OK’. Furthermore, the module doesn’t even print anything when I power-cycle it.

STM32CubeProgrammer v2.11.0 settings:

SWD, 24 kHz Freq, Normal Mode, Hardware Reset

Firmware:

.hex file in located in https://downloads.rakwireless.com/LoRa/RAK3172/Firmware/RAK3172_Latest_Firmware.zip

Connections Between STLINK V3 and RAK3172 Breakout Board

3V3
GND
SWCLK
SWDIO
NRST

An external 2xAA battery pack is providing power.

carlrowan · November 9, 2022, 10:45pm

Welcome back to forum @jackyruth ,

The FW you uploaded is the legacy one. If that is the one you need, you need to use 9600 baud rate on AT commands.

However, I suggest you proceed on the RUI3 firmware since the support on legacy firmware is halted. Here’s the RAK3172 RUI3 firmware - https://downloads.rakwireless.com/RUI/RUI3/Image/RAK3172-E_latest_final.hex

If via RAK bootloader, this bin - https://downloads.rakwireless.com/RUI/RUI3/Image/RAK3172-E_latest.bin

jackyruth · November 10, 2022, 12:42am

That fixed it thanks.