Review on 🏠 HiLetgo ESP8266 5V WIFI Relay Module - Smart Home Automation System with TOI APP Control by Nick Nigerson

I didn't like that it isn't a simple GPIO output to control relays from ESP01. ESP must work with AT command firmware. Ok, but it's not working for me. I need an empty ESP01. This relay has a second MCU to control the relay, it listens to the ESP01 TX/RX. Here is the code to open and close the relay. , 0xA1};byte RlyClose[] = {0xA0, 0x01, 0x01, 0xA2};void setup() {Serial.begin(9600);}void loop() { //Open relay Serial.write("+IPD , 0.4"); Serial.write(RlyOpen, sizeof(RlyOpen)); Serial.println(""); delay(5000); // close relay Serial.write("+IPD,0,4"); Serial.write(RlyClose, sizeof(RlyClose)); Serial.println(""); delay(5000);}