ESP based Tank Gauge using I2C ultrasonic sensor, serial TFT display, WiFi web interface and MQTT/Homie interface
Features:
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I2C ultrasonic range sensor type GY-US42
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serial color LCD display (Digole)
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Wemos mini
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Internal web server (display status, history graph display, history json download, config upload)
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OTA
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Send to MQTT
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Display level in cm, %, liters & bar graph
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History saved (JSON) in internal storage