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Driving a 4 Channel Relay Board With ESP8266-01 and MQTT and OpenHAB - Instructables
Ebay Wifi Relay boards - Let's Control It
LC Technology WiFi Relay - Tasmota
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DC 5V ESP8266 WIFI 4 Channel Relay Module Remote Control Switch IOT Wireless Transmitter For Smart Home - WiFi Module - Arduino, Robotics, Raspberry Pi, ESP8266, Learning DIY, Development board ICStation
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4 channel Relay ESP8266 Wifi board WORKING with esphome - #60 by vinzzs - ESPHome - Home Assistant Community
DC 12V ESP8266 WIFI 4-Channel Relay Module (13405) from ICStation on Tindie
