pellet level surveillance

A system to keep an eye on the level of a pellet tank, as sensor we will use a HC SR04 (cheap) Ultrasonic sensor, that will need to be protected from dust with e.g. a SG90 servo driven cover.

For piloting the whole thing, an ESP32 that transmits the data back through MQTT.

To draw the diagram , please use something like fritzing

using:

• HC SR04 mockup
• Servo mockup

tutorials:

• MQTT and ESP32 tutorial
• SG90 and ESP32 tutorial

tech information:

• distance sensors
• Esp32 VL53L1X(4m version) demo

cheating:

• https://nerdiy.de/howto-espeasy-vl53l0x-vl53l1x-distanzsensor-an-den-esp8266-esp32-anschliessen-und-auslesen/