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

system Closed December 21, 2021, 10:22am 14

This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.

Topic		Replies	Views
Can Send and Reeive a message in time with arduino UNO? Programming	3	760	May 5, 2021
Sending AT commands From Arduino to GPRS and feedback is garbage Programming	9	1113	May 5, 2021
Problems with Software Serial of GPRS Shield Programming	24	13273	May 5, 2021
Send SMS from GSM modem using Arduino Programming	3	1837	May 5, 2021
Sending SMS using SIM900 GPRS Shield Networking, Protocols, and Devices	8	15957	May 6, 2021