ESP32 Based 8 Channel Relay Board Micro Controller Board WiFi LAN Bluetooth

It have builtin w5500 ethernet module which enable this iot development board to connect with lan network.

Relays are being controlled using 75hc595 shift register and uln2803 Darlington driver ic, here is its example code test relays functionality.

// Define pin numbers

const int DATA_PIN = 32; // Connect to the data (DS) pin of the 74HC595

const int LATCH_PIN = 33; // Connect to the latch (ST_CP) pin of the 74HC595

const int CLOCK_PIN = 25; // Connect to the clock (SH_CP) pin of the 74HC595

void setup() {

pinMode(DATA_PIN, OUTPUT);

pinMode(LATCH_PIN, OUTPUT);

pinMode(CLOCK_PIN, OUTPUT);

}

void shiftOutData(byte data) {

// Shift out each bit of the data byte

for (int i = 7; i >= 0; --i) {