GSM module, AT commands, uart

Hi everybody. I'm working on GSM module motorola g24l. I would like try write some AT commands. But it doesn't work. Witch baud rate should I use? Could u check my schematic if is properly? as soon as possible thank u for your help

usually it is 9600, but try changing from 4800 to 115200 and try it should work with any one baud rate

I've tried changing baud rare. Nothing happened. I think there is a hardware problem...
any suggestions please???

Is your cable working.. short pin 2 & 3 and type something on terminal to see if you are getting the characters you type.

use 12V/1A power supply. if your modem works at 5V.

or interchange the tc and rx on your cable at one end and try

I think you should limit Baud rate .
try it

I found the problem. On GSM module g24l are some pins (IGN, ON_on...) , that works as ignition. I didn't connect them. well, I can't turn on the module. Thanks for your help.

sloso said:

I found the problem. On GSM module g24l are some pins (IGN, ON_on...) , that works as ignition. I didn't connect them. well, I can't turn on the module. Thanks for your help.

Click to expand...

Hi, I'm facing the same problem as well - not getting a response from HT. I have configured the IGN, CTS_N and RESET_N according to the timing sequence in the operating instructions (if anyone knows the exact method of doing this please let me know - think this is the main reason why its not working!). Please can I know what were your HT settings - i.e. flow control = hardware? (I used hardware as it mentioned that by default the G24L is in hardware flow control). However, when I do this, HT gives me an error saying "Unable to open COM8. Please check your port settings". The settings I used in HT is the same as that of the USB/Serial cable (i checked via device manager). My baud rate is set to 19200.
Do I need any drivers from motorola to use this?

Any advice is very much appreciated! Have been stuck for almost a month now! Thanks!