I’m trying to get a RAK3272S to work. I have hooked it up to 3.3V of a bench power supply. The UART is connected to a FTDI TTL-232R-RPi.
The module doesn’t take any current. Also double-checked with a Fluke Multimeter. Is this normal? Also, sending it AT commands via RAK SERIAL PORT TOOL doesn’t do anything.
I have also tried to pull BOOT0 to high/low. Doesn’t change anything to the current.
The same applies to the RST Pin.
Do I have a wiring issue? Or did I maybe receive a faulty module?
It seems your module has the legacy firmware 1.0.4. If ever you will switch to RUI3, the baud rate will be now 115200. It is not really intuitive but AT CMDs and FW update is done in UART2 and not UART1. LPUART feature of STM32WL chip is on UART2 only.