How to control a relay module using blynk app

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IOT Based Home Automation by Using ESP8266 (NodeMcu) with Blynk

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Home Automation using NodeMCU & Blynk with Touch sensor LDR Temperature control Relay | IoT Projects

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IoT Temperature & Humidity Monitoring & Control System using ESP32 & Blynk 2.0

Arduino and IoT Projects

Today we will make an IoT-based Temperature & Humidity Monitoring & Control System using ESP32 & Blynk to grow mushrooms at low temperature
Using ESP8266 and MIT App Inventor to control a Relay

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ESP8266 (ESP-01) Wi-Fi module will be used to connect your Relay and to control it through your Wi-Fi network. The client will send instructions or commands through the Android App which the ESP8266 will receive and will carry out the operation.