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Wiring SIM800L

Make sure to switch to 5V on USB2TTL serial adapter

notice

Wiring USB2TTL

VCC to VCC
GND to GND
RX to TX
TX to RX

wiring


Additional power information

IMPORTANT!!!

  • SIM800L needs external power supply 5V/2A
  • This can be bypassed with capacitor 16V 2200uF and provide stability during Calls & SMS due to higher power draw.

Capacitor Wiring

VCC to VCC
GND to GND