Serial Monitor to check feedback of GSM Sim900a

Thread Starter

Samuel Wong 1

Joined Jun 4, 2018
1
Hey guys, Im trying to interface the GSM Sim900a module with my PIC16F887 microcontroller. I have trouble with the connection of the GSM so I tried to use serial monitoring to check for feedback. I am currently using the Arduino Ide for serial monitoring.
Annotation 2020-05-18 210758.jpg
After typing AT command, it is supposed to reply OK but replies AT instead
Please help. Thank you.
 
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