Hi all, during lock-down, as I do not have a garden I started getting into hydroponics to grow veg indoors. Of course this all needed to be automated and monitor-able via Home Assistant.
Grow lights control and automation over ZHA via a Samsung Smart Things switch
Grow Lights energy consumption monitoring via a Samsung Smart Things switch
Tent humidity monitor Xiaomi Mijia Temperature and Humidity zigbee sensor
Tent temperature monitor Xiaomi Mijia Temperature and Humidity zigbee sensor
Light level sensor via MD-338 lx I2C BH1750 connected to raspberry pi controller running gpio2mqtt
5v USB powered fan in tent controlled via relay connected to raspberry pi controller and exposed over gpio2mqtt
Small 5v water pump and custom drip feed system for none-hydroponics plants in the tent also controlled via relay connected to raspberry pi controller and exposed over gpio2mqtt
Controller temperature sensor DS18B20 exposed via gpio2mqtt - used to automate the fans on the controller to prevent overheating
Two small case fans to prevent controller overheating controlled via relay and gpio2mqtt
Samsung Smart Things leak sensor connected over ZHA with automation to alert me on Amazon echo and push bullet if a leak occurs (actually came in handy once)
Webcam inside the tent (why not) - exposed by motion eye
Raspberry pi camera pointing and entry door (figure could do security) - exposed by motion eye
I originally tried getting the temp and humidity using DHT11 and DHT22 sensors over gpio2mqtt but whilst it worked fine it seems the sensors kept dying after a few days before I gave up and acquired a zigbee sensor. I think it might have been the high humidity of the tent that damaged the sensor.
The controller box (grey box on the wall) hosts the raspberry pi, relays, connections, power bricks, fans, temp sensor and air pump. The air pump generates a lot of heat hence the cooling solutions
Does anyone have an affordable / diy hydroponic monitoring system that they are using with Home Assistant? I would like to receive notifications of PH and TDS issues.
I have built some using ESPHome and DfRobot products. I did run into this project that looks to simplify making the connections and things. It is maybe a little bit more expensive then doing it yourselft but it look well done and cheaper then some of the big outfits. https://www.ufire.co/
I use Atlas Scientific ezo-usb adapters with the ph and ppm probes and sensors into homeassistant via usb serial integration. best option for zero wiring.
out of the box the ezo sensors accept serial commands, and a set list of them exist. without the ezo-usb accessories the ezo-sensors use an i2c interface and in one sentence, I know nothing about it. I get the sca/sdl part and an address… After that, the interaction and the upkeep is completely out of my realm of things i have time to learn about.