💧 Monitoring water tanker level using NodeMCU ESP8266 and HC-SR04P Ultrasonic Sensor and broadcasting it using a simple HTTP server inside NodeMCU ESP8266 and show data in an Android App Using ...

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This was developed using a NodeMCU v2 Dev Kit as it conveniently provides a secondary UART for debugging. It has been tested with the ESP-01 shipped with the PixRacer and it is stable at 921600 baud.

The communication is achieved via UART, I2C, SPI, ADC, and GPIO interfaces. Antennas connect using MHF4 (IPEX) connectors or RF pinouts, depending on the variant. The RUI3 firmware is preloaded, and ...