Adafruit STEMMA Soil Sensor - I2C Capacitive Moisture Sensor [JST PH 2mm] : ID 4026 : $7.50 : Adafruit Industries, Unique & fun DIY electronics and kits
Chirp! - plant watering alarm from Catnip electronics on Tindie
Tuya Zigbee Wireless Soil Moisture Meter Temperature Humidity Tester Plant Monitor IP67 Waterproof Detector for Garden Planting - AliExpress
Buy Wholesale China Tuya Agriculture Smart Wifi Soil Moisture Sensor Temperature And Humidity Sensor For Garden Plant & Wifi Soil Moisture Sensor at USD 38.7 | Global Sources
Zigbee flower and plant sensors for soil moisture + light + temperature + humidity? - Hardware - Home Assistant Community
Smart Plant Water Meter and Health Sensor – Sage & Sill
RainPoint TCS005FRF WiFi Soil Moisture Meter – RainPoint Irrigation
Tuya Zigbee Wireless Soil Temperature Humidity Sensor IP67 Soil Monitor Meter Works With Garden Plant Smart Irrigation - AliExpress
In-Depth: How Soil Moisture Sensor Works and Interface it with Arduino
Amazon.com: Soil Moisture Meter 4 in 1,Plant Water Monitor,Automatically detect Moisture/Temperature/Light/Fertility,Can Connect to Mobile Phone via Bluetooth,Hygrometer Sensor for Indoor Plants (1pc) : Patio, Lawn & Garden
Amazon.com: KKnoon Tuya Zigbee Wireless Soil Moisture Meter Temperature Humidity Tester Plant Monitor IP67 Waterproof Detector for Garden Planting : Patio, Lawn & Garden
A Solar-Powered Soil Sensor for Serious Gardeners | WIRED
Best Wifi Plant Watering System | 2019 Devices and Sensor Guide