Dear Arduino Forum,
I have a question about the MKR WAN 1310. I would like to make a custom board which also has an LTE module in addition to the LoRa chip. Now I am testing the whole thing a bit, but the CMWx1zzabz-078 LoRa chip from Murata refuses me any AT commands (on pin 23 and 24).
When I start the module, I get: "LoRa module ready for test<\r><\n><\r><\n>" via the uart.
When I send an "AT" (with CR), I get the following response: "AT_CMD_ERROR<\r><\n>" via the uart. The sent "AT\r" looks good...
I use Hterm and a normal FTDI adapter. I have the same behavior when I write out an "AT\r" with the serial interface of the Arduino.
Do I have to load the CMWx1zzabz-078 chip with a firmware via the SWD interface beforehand? I have found the following repository in this regard:
But the description in this repository does not help me.
Unfortunately, the script MKRWANFWUpdate_standalone does not work either, as it also works with the AT commands. Does anyone here have any experience of how to configure the LoRa module? Many thanks in advance for your help!
Greetings Tobias