Weird SIM800C problem

chenbingjy

Weird SIM800C problem [Copy link]

I use STM8S207C8T6 to write programs, and the development environment is IAR. I use SIM800C before, but it was just for sending. Now I need to receive. The transparent transmission is successful, and I can receive the data I sent using the network assistant. Here comes the problem. I need to write a program to process the receiving. I originally wanted to send data to SIM800C through the network assistant, but I found that as soon as I sent data to the server, my serial port would receive the same data. It's really strange. If anyone has encountered this situation, please help me take a look, thank you!

chunyang

Just turn off the serial port echo and read the module's operating instructions and AT command set carefully.

y909334873

ATE0\r\n should be to turn off the echo, AT&W\r\n to save the settings

chenbingjy

It didn't appear again, strangely