Arduino

ESP HomeKit

ESP8266 – HomeKit Contact Sensor

Know the status of something you can open or close. Simple and easy to install with no tools required, The ESP8266 – HomeKit Window Contact Sensor combines simple technology with everyday peace of mind. And even better, it can control other HomeKit accessories in your home when doors or windows are opened or closed. ESP8266 …

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ESP8266 – ESP-WROOM-02 with 18650 battery

The “WEMOS D1 Esp-Wroom-02” that I got from Ali express is another micro controller development board with an ESP8266 WiFi chip. The board has an integrated 18650 battery charging circuit. There is also a board that has an OLED screen and a directional button built-in. This makes the board an excellent option for mobile applications. And like all …

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ESP8266 – I²C bus

The I²C bus communication is one out of three possible communication protocols, the ESP8266 is able to communicate with other devices like OLED displays, barometric pressure sensors and so on. The two other communication protocols are SPI and UART. I²C stands for Inter-Integrated Circuit was invented 1982 by Philips Semiconductor (A Dutch company), now NXP …

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