![]() The Arduino Nano is powered by the 3.7 V battery connected to the 5 V pin. Of course, you need to initialize the serial port first. Just replace display.print() on the sketch below with Serial.print(). If you don't own a Nokia 3310 LCD and is not planning to buy one, you can use the serial port instead. The Nokia 3310 LCD breakout board runs on 3.3 V and not on 3.7 V! My solution is to connect its VCC pin to the 3.3 V of the Arduino Nano and it works. ![]() If the LED blinks very fast, this means it's connected through GPRS. You will know if it's connected to the network when it blinks every three seconds. If it is blinking every second, this means it is searching for a network. If the power to the SIM800L is enough, the on-board LED starts blinking. ![]() I decided to buy a battery online and it works wonderfully. This is after a lot of tests, including using regulators, variable power supplies, etc. ![]() The breakout board absorbs 2 A at peak but I found out that a 1000 mAh battery works. The best power source is a 3.7 V LiPo battery with at least 1000 mAh rating. It goes without saying that the SIM800L breakout board is very particular to the power applied to it. Arduino Nano and SIM800L Connection: SIM800LĪrduino Nano and Nokia 3310 LCD Connection: Nokia 3310 LCD
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