Solar-Soil-Sensor with Battery

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4881738.

This is a enclosure designed for

• 130x150 mm Solar Cell like this: https://aliexpress.com/item/32876110183.html
• MH-ET Live (ESP32) or LoLin Lite (not really necessary because the DFR Charges the Battery) -see file name!
• DFRobot DFR0559 Solar Power Manager https://eckstein-shop.de/DFRobot-Solar-Power-Manager-5V-fuer-Solarpanel-max-900mA-Ladestrom
• 61x47mm 2500mAh LiPo Akku like this: https://eckstein-shop.de/LiPo-Akku-Lithium-Ion-Polymer-Batterie-37V-2500mAh-JST-PH-Connector
• BME280
• 4x or 5x JST-XH 2,54 / 3PIN like this https://de.aliexpress.com/item/32741723157.html
• very(!) Short USB-A to MicroUSB Cable

Wire the Solar Power Manager to the solar cell throught the hole in the middle with 2 short cables Solder the 4x JST-XH PIN 1 together to Ground, PIN 2 to 3.3V (maybe with a line-grid-PCB), PIN 3 each to 32,33,34,35 on the ESP32 Solder the BME280 to the ESP32, connect the Battery to the Solar Power Manager.

Finally connect up to 4 Soil Sensors to the JST Connectors, the 5. Connector can be used to charge the Battery without sunlight (for indoor or winter usage) - maybe use another Connector - a 2 PIN would be ideal.

Flash ESPHome with config for Sensors:

sensor:

• platform: bme280 temperature: name: "BME280 Temperature" oversampling: 16x pressure: name: "BME280 Pressure" humidity: name: "BME280 Humidity" address: 0x77 update_interval: 60s
• platform: adc pin: 32 name: "Bodenfeuchte1" update_interval: 120s unit_of_measurement: "%" attenuation: 11db filters:
  • lambda: |- if (x > 3.3) { return 0; } else if (x < 1.10) { return 100; } else { return (3.3-x) / (3.3-1.10) * 100.0; }
• platform: adc pin: 33 name: "Bodenfeuchte2" update_interval: 120s unit_of_measurement: "%" attenuation: 11db filters:
  • lambda: |- if (x > 3.3) { return 0; } else if (x < 1.10) { return 100; } else { return (3.3-x) / (3.3-1.10) * 100.0; }
• platform: adc pin: 34 name: "Bodenfeuchte3" update_interval: 120s unit_of_measurement: "%" attenuation: 11db filters:
  • lambda: |- if (x > 3.3) { return 0; } else if (x < 1.10) { return 100; } else { return (3.3-x) / (3.3-1.10) * 100.0; }
• platform: adc pin: 35 name: "Bodenfeuchte4" update_interval: 120s unit_of_measurement: "%" attenuation: 11db filters:
  • lambda: |- if (x > 3.3) { return 0; } else if (x < 1.10) { return 100; } else { return (3.3-x) / (3.3-1.10) * 100.0; }
• platform: adc pin: 36 name: "Bodenfeuchte5" update_interval: 120s unit_of_measurement: "%" attenuation: 11db filters:
  • lambda: |- if (x > 3.3) { return 0; } else if (x < 1.10) { return 100; } else { return (3.3-x) / (3.3-1.10) * 100.0; }