I have a mini A6 GA6 GPRS GSM
I followed this tutorial:
https://www.ayomaonline.com/programming/quickstart-sim800-sim800l-with-arduino/
The SIM800L module should opearate using 5V but I am having trouble uploading the sample code to the Arduino Pro mini (5V) when the SIM800L is connected to to the arduino pro mini.
When I have:
SIM800 5v ↔ Arduino pro mini Vcc
SIM800 "G" (either one) ↔ Arduino GND
SIM800 UTX ↔ Arduino D8
SIM800 URX ↔ Arduino D7
Code wont upload. If I remove the connection the code uploads to Arduino pro mini OK.
What is the right way to connect Arduino and SIM800L?