We'll setup MQTT and test in preparation for configuration in NodeMCU (ESP8266-12E) 2-Channel Relay Module Breadboard Jumper Wire For those who don’t have access to a relay module, you can use 2x single channel relay modules or single relays with the supporting … 4. in: India's Largest Online Robotics Store. Creat … Step 4: Prepare Electrical Connection. Control home appliances with manual switches. NodeMCU (Esp8266) 4 Channel Relay to connect 4 appliances Jumper wires Smartphone to operate home appliances using Blynk App Now, add 4 buttons from Widget box as we are using 4 channel relay.
High Level Trigger - The relay module is triggered by a high-level signal(1.
