Did anybody ever connect a Siemens C45 (or similar Siemens mobile) to the Arduino to send text messages using AT commands?
I've opened the mobile phone and soldered the wires as needed tx rx gnd connected with beadboard.
Anyone can give some tips, since I have no serial port on the laptop, and I do direct experience with the arduino.
1ºExperience.
connected with the tx --- rx to rx -- tx arduino and serial monitor 19200 baud and then I wrote the AT but the phone does not respond
Experiment also get the chip did not work.
I've seen comments that the phone work with at commands with attiny
Thanks for your help!