We are running a survey to help us improve the experience for all of our members. If you see the survey appear, please take the time to tell us about your experience if you can.
I am using hypertrm for communicate with gsm modem,my problem is i am not using "local echo",but characters are displayed on hypertrm when i used key board storks,and it was not shows the responses from the modem, please tell me what is the problem?
It wasn't a comment to your comment, but a comment to the OP :)
Anyway, if the terminal program can't receive any characters, then the normal route to check is: - is there a MAX232 or similar level converter between the microcontroller and the RS232 serial port. - are all wires connected correctly, so rx/tx hasn't been switched, or the receiver and transmitter halves of the level converter switched. - let the microcontroller send out data, and verify that it sends anything. - verify that the bit lengths of the data sent by the microcontroller has the correct baudrate. - verify that this data reaches the PC (and with the correct signal levels) - verify that the PC terminal program has the correct communication settings (including turning off any hardware handshake, unless the port is expected to use hw handshake)
yes thanks i got the problem ,its nothing but wired problem