Capacitive Soil Moisture Sensor with ESP8266 (no battery)

thingiverse

Capacitive Soil Moisture Sensor Built with ESP8266 Mini D1 and $1 Sensor. This module runs on ESPHome, connecting seamlessly to Home Assistant. The sensor is plugged into an Analog To Digital converter. Materials Needed: - ESP 8266 D1 Mini Board: Available at https://www.aliexpress.com/item/32635160765.html - Soil Moisture Sensor: Found at https://www.aliexpress.com/item/32832538686.html Remember to protect the board with a waterproof coating using nail varnish or epoxy. **Important Settings for ESPHome Code** esphome: name: d1_mini_1 platform: ESP8266 board: d1_mini wifi: ssid: "ssid" password: "password" Enable a fallback hotspot (captive portal) in case the WiFi connection fails. ap: ssid: "D1 Mini 1 Fallback Hotspot" password: "62wyi816wkxL" captive_portal: logger: Enable logging. api: Enable Home Assistant API password: "password" ota: password: "password" ADC Converter Settings sensor: - platform: adc pin: A0 filters: - lambda: |- if (x > 0.53) { return 0; } else if (x < 0.29) { return 100; } else { return (0.53-x) / (0.53-0.29) * 100.0; } name: "Grapefruit Watering" update_interval: 2s