This repository contains the implementation details and code for a garden sensor. Depending on the enclosure you use, it could be used inside or out. The current implementation is strictly for soil moisture readings but, in the future, this will hopefully support temperature, humidity, light levels and perhaps some automated watering functionality.
The project currently leverages a Metro M4 Airlift Lite for WiFi support. The corresponding code will start a webserver on port 80 and allow you to query for sensor readings. The readings are returned in a JSON format.
Example Exchanges TBD
Parts
- Arduino Metro M4 Airlift Lite
- LED (Green)
- LED (Red)
- 220 ohm resistors (2)
- VH400 Soil Moisture Sensor
Diagram
If you're new to Arduino development, please start here.
The following libraries are required:
- WiFiNINA
- ArduinoJson
- ThingSpeak
The repository consists of two files:
| File | Description |
|---|---|
| gardensensor.ino | This is the main source code that will need to be uploaded to your Arduino. |
| arduino_secrets.h | This file will contain your local WiFi networks SSID and password. Any changes to this file should not be persisted back into this repository. |
Credit where credit is due:
The code responsible for getting readings from the LH400 was lifted from this repository and it saved me lots of trial and error on how to interact with this particular sensor. Thank you Michael Ewald.