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Which PLC would you recommend to implement GSM AT commands

Which PLC would you recommend to implement GSM AT commands

Which PLC would you recommend to implement GSM AT commands

(OP)
I am a newbie in the PLC world and I would appreciate you experts to helping me out. I want to have a PLC communicating with a GSM modem (or GSM phone) through an RS232 port sending GSM AT commands...like sending an SMS. Has anyone here interfaced a PLC with a GSM phone? What PLC would you recommend? I would prefer one that has at least 1 relay output and input. Is there anything more required to establish the communication or do I just right away after connecting send the ASCII characters (AT commands).

Any help will be appreciated.

RE: Which PLC would you recommend to implement GSM AT commands

Check out the Simatic S7-200

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