Projects

image example
SIM800L Phone

Arduino phone using SIM800L GSM module. Connection is not complicated, only problem is the power supply. From google, this device should get 3.7V to 4.2V. However, mine is working on 5V.
refer to clip.ino bottom to retrieve caller ID
you must spend some time to decipher your keypad's pin
tips: randomly pick 2 pins to see connection, can test with multimeter, if connected, try the neighbour sequently.
clip.ino

keypad.ino
oled.ino
keypad_oled.ino
sim800l_phone.ino

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