Hi,
I actually have a problem with my RAK board.
i would like to know how to reset the board to factory settings (after i have tried some toturials on your site i can’t enter the AT commands anymore)
how i should connect the pins to the Rak DAP1 to hardreset the board.
Hi Carl,
first of all thank you for your response.
actually the RAK serial Port tool do not responding to any comand even the run,
when i send the at commands the i got a message AT commands not supported .
i have done everything as you suggested.
using a jumper for the boot pin. and now i go this message.
16:24:41 : Serial Port COM12 is successfully opened.
16:24:41 : Port configuration: parity = even, baudrate = 115200, data-bit = 8, stop-bit = 1.0, flow-control = off
16:24:42 : Timeout error occured while waiting for acknowledgement.
16:24:42 : Timeout error occured while waiting for acknowledgement.
16:24:42 : Error: Activating device: KO. Please, verify the boot mode configuration and check the serial port configuration. Reset your device then try again…
The STM32CubeProgrammer wasn’t able to detect the RAK3172.
Few things we can look at.
Can you confirm if the COM port is correct?
Double check if the wires are ok. If you have multimeter, please check the continuity from the pin of the RAK3172 board to the pin of the USB-SERIAL converter that you use. Broken jumper wire is very common. I still experience it myself.
Can you check if there is a steady 3.3V voltage on the supply lines - VDD and GND?
When you plug in the board with BOOT already shorted to ground but still can’t be detected, can you short RST to GND pin of RAK3172 breakout board momentarily then try to click connect button again? It will reset the board and hopefully you can connect now.
Can you try a lower baud rate? 57600, 19200 then 9600.
Is it possible you can try a different USB-Serial converter board?
Is it possible to try to a different USB port, USB cable/hub (if you use one) or even PC?
I hope after checking these items we can make you RAK3172 work again
I am not sure what happened to your board but it seems to be damaged if you already followed the guides I shared in my previous post but still cant be detected - RAK 3272S reset problem - #5 by rami
Hi Carl,
i already followed the guide that you shared with me but i still cant connect to the stmCubeProgrammer.
if you assume that my board its damaged it should not communicate with RAK SerialPort Tool
some of the AT commands give a feedback.(correct me if i’m wrong).
by the way its not the only board that have this problem ive got 23 RAK 3172 and 2 RAK3272 and they all give me the same problem.
its impossible that all the 25 modules are broken or damaged.
I see. You are correct. That can’t be the case for 25 modules
Hmm. Let’s troubleshoot more.
I see that your connections are correct in the image.
If all are happening in 25 modules, there is one problematic part that causes this problem. I already mentioned it above like the jumper wires, USB-Serial converter, USB port, PC driver, etc. But we could still be missing something in your current setup.
It will only be useable if the device is in boot mode. Your devices seems to be in ok condition so there is no need to do that. I see the OK reply on at