Hello,
My theory was wrong.
Bruce in the post #13 there is no modem connected.
The post #13 as I understand it:
The PIC sends "ATE0" to the RX pin of the PC. (The terminal program of the PC shows ATE0).
The PIC sends "ATV0" to the RX pin of the PC. (The terminal program of the PC shows ATV0).
Ioannis types "0" in the terminal program of the PC and the PIC gets this byte
otherwise no further AT commands are sent by the PIC.
The PIC sends "ats0=2" to the RX pin of the PC. (The terminal program of the PC shows ats0=2).
The PIC sends "ATX3" to the RX pin of the PC. (The terminal program of the PC shows ATX3).
The PIC sends "AT&K0" to the RX pin of the PC, but the PC terminal program shows only
AT and after a minute in addition to AT the PC receives also <00>. So after a minute
on the PC screen you will see AT<00> and the execution of the program continues normally
in the PIC. (So the PIC does not successfully send AT&K0 to the PC).
Ioannis please confirm that.
Luciano
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