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ESP8266-01S ESP-01S WiFi module 5V with relay adapter

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ESP8266 ESP-01S 5V WiFi Relay Module Things Smart Home Remote Control Switch for Arduino Phone APP ESP01S Wireless WIFI Module - AliExpress

Based on ESP-01S WIFI module. Wide voltage input, support DC 5V. Light weight, compact size and very easy to install in a small case. It can be used

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