Communication problem GM862 USB

Wireless & IoT
1

I downloaded the diver. When I try to communicate with the board and in HyperTerminal I type: AT I receive OK, for all other AT-commands I got ERROR as responce?

Any idea what I have wrong?

2

Do any of the ATI commands give anything, or is AT on its own the only thing that works?

3

Yes all AT-commands gives this ERROR except AT then I get OK.

I tried the SIM-card in an other module (from Multitech) and that works fine

Also if I tried to change AT#BND=1 I get the ERROR

4

I’m wondering if you’re actually speaking to the GM862 and not another modem (or emulator).

The SIM card and band setting are not important for testing the module - you should be able to time ATI or AT+CGMR and get a response. ATI should give a return from any modem, which would help confirm what it was.

If the module had failed I wouldn’t expect you to get any response at all, not even an ERROR return

5

Thanks cabbage, I was not talking to the GM862.

Unplugged a few thing, and now all works OK.

Thanks

Joris H