ESP32 Arduino Uno LED Resistor 220Ω Jumper wires Power bank (for ESP32) USB cable (for Arduino) void setup() { // Start Serial2 at 4800 baud // RX = 16, TX = 17 Serial2.begin(4800, SERIAL_8N1, 16, 17) ...
void setup() { // Start Serial2 at 4800 baud // RX = 16, TX = 17 Serial2.begin(4800, SERIAL_8N1, 16, 17); } Serial2.begin(...): initializes secondary serial ...
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