I am using the code furnished below to send an sms to a SIM900A GPRS module ( without shield ) via a Altsoft software serial. I am using Arduino UNO in this project. Most of the time, it works but sometimes it doesn't. I understand I am supposed to receive an "OK" response to confirm that the sm…

Sending SMS message vis GPRS SIM900A with Arduino UNO is not reliable

seccpur August 23, 2021, 8:48am 3

Thanks for the observation. Please suggest a solution.

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