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ESP8266/32 (Home Assistant Switch) connected to PCF8574 controlling 8
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![ESP8266 NodeMCU Relay Module - Control AC Appliances (Web Server](https://i2.wp.com/randomnerdtutorials.com/wp-content/uploads/2019/12/Relay-pinout-8channels-esp8266.png?ssl=1)
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![How to Program the ESP8266 ESP01 Wi-Fi Relay Module | RemoteXY | FLProg](https://i.ytimg.com/vi/ZIw0AnAsR9U/maxresdefault.jpg)
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![ESP8266 - 2-Channel Relay Module | ESP8266 Tutorial](https://i2.wp.com/newbiely.com/images/tutorial/esp8266-2-channel-relay-module-external-power-wiring-diagram.jpg)
![ESP8266-01 two relays - EasyEDA open source hardware lab](https://i2.wp.com/image.easyeda.com/histories/fc173b659d0248a2a4beec081767f475.png)
ESP8266-01 two relays - EasyEDA open source hardware lab
![Control Relay 4 Channel With ESP8266 Nodemcu via Blynk - Dicky B_Mz](https://1.bp.blogspot.com/-OCfGfOiWmgY/XW34JIJTc4I/AAAAAAAAOtI/wL6f3QPIMPEbonx1S_X_Jy8bUKKPyqnlwCLcBGAs/s1600/ESP8266%2BRelay%2BBlynk.png)
Control Relay 4 Channel With ESP8266 Nodemcu via Blynk - Dicky B_Mz
![Using ESP8266 and MIT App Inventor to control a Relay | IoT](https://i2.wp.com/www.electronicshub.org/wp-content/uploads/2018/04/Control-a-Relay-using-ESP8266-and-Android-Circuit-Diagram.jpg)
Using ESP8266 and MIT App Inventor to control a Relay | IoT
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ESP8266 Relay Board - EasyEDA
![Nodemcu Relay Transistor Circuit Diagram](https://i2.wp.com/www.engineersgarage.com/wp-content/uploads/2019/10/nodemcu-relay_orig-1.png)
Nodemcu Relay Transistor Circuit Diagram
![Wifi IoT ESP8266 Relay Board Schematic – PCB HERO](https://i2.wp.com/hackster.imgix.net/uploads/attachments/1458167/image_m3iHGZkzvK.png?auto=compress%2Cformat&w=740&h=555&fit=max)
Wifi IoT ESP8266 Relay Board Schematic – PCB HERO
![ESP8266/32 (Home Assistant Switch) connected to PCF8574 controlling 8](https://i.ytimg.com/vi/6CzkeJei5i0/maxresdefault.jpg)
ESP8266/32 (Home Assistant Switch) connected to PCF8574 controlling 8