Plant health sensor
Are your plants thirsty?
This sensor will show you the moisture level of 5 plants (and can even help you water them).
Get a deeper reading of the soil's moisture levels, and log it over time.
These sensors use the same technology as touchscreens, which makes them more rust resistant.
Check on 5 plants
You can connect between 1 and 5 soil sensors.
As an upgrade, you could even automatically water your plants.
An early prototype
Connected up to 6 sensors
Your plants are your business
Many smart plant sensors send your data to the cloud. How many plants you have, and how you treat them, could lead to algorithmic conclusions about your personality and lifestyle.
There are few good reasons to connect these sensors to the internet. Even if you'd like the system to connect to a database that tells you when to prune or plant seedlings, such a database could easily run locally, in your own home.
The only cloud your plant should ever need, is the type that contains rain.
Building the sensor
Connect the moisture sensor(s)
- Connect the soil sensor to pin A0. If you have more sensors, connect them to A1, A2 and A3 in similar fashion.
Connect the OLED display
Connect the screen's SDA (data) pin to signal pin A4 on the expansion board.
Connect the screen's SCL (clock) pin to signal pin A5 on the expansion board.
Connect the screen's GND (ground) pin to any ground pin (black color) on the expansion board.
Connect the screen's VDD (positive) pin to any VCC pin (red color) on the expansion board.
Plug in the RF-Nano Arduino
Plug the RF-Nano into its socket. The USB connector should be on the outside of the main board.
Add your new device
Visit the Candle controller and on the things page press the (+) icon. Your new creation should be available. Optionally, select which of its properties you'd like to have in the spotlight. Click on "save" to complete the proces.
Small OLED screen2019-01-21 18:59:57
This small screen is built with OLED technology. It uses very little power.
RF-Nano Arduino2018-08-10 10:21:43
The RF-Nano is an Arduino Nano with built-in wireless connectivity. It's the brain of all Candle devices. If you buy one…
Dupont wire2018-08-09 11:44:39
These wires allow you to easily connect the main board to sensors and actuators. They snugly fit over the pins. No soldering…
Soil sensor2018-08-07 09:51:32
This is a capacitive soil sensor. The advantage of this type is that it does not rust. It works the same way that a touchscreen…