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Topic: how can i start gsm shield (Read 544 times) previous topic - next topic

ehsan8888

I purchase gsm modoul :http://shop.aftabrayaneh.com/Sim900_Gsm_Modem.html?search=gsm
2 year ago and i want start it by arduino uno
but i can not connect it to this module by TTL protocol
please help me

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