New version of water self watering system Part 1

During this summer I’ve been working on a small IoT project. The goal is an automatic self-watering system using soil-moisture sensors and water pumps, controlled by a web server running on a Raspberry Pi so I can manage it from anywhere.

🔩 Components Used

• 3× RUNCCI-YUN Mini Water Pumps
• 3× Hygrometer Module V2.0 Soil-Moisture Sensors
• 1× ICQUANZX 16-Channel Analog/Digital Multiplexer Breakout
• 1× Arduino Uno R4 WiFi
• 1× Raspberry Pi (hosting the web server)

🧠 How It Works

1. Soil-moisture sensors continuously measure the humidity in the soil.
2. Readings go through the multiplexer into the Arduino Uno R4 WiFi.
3. Based on thresholds, pumps activate to water the plants.
4. A web server on the Raspberry Pi provides remote monitoring and control.

🧪 Next Steps

• Improve the web UI for easier control.
• Add notifications for low water level.
• Optimize pump activation to save water and energy.

🧰 Relays for pump control

Here are all the relays used to switch the pumps:

Close-up showing 3d-printed chassi for soil moisture sensors:

🧼 Sensor chassis

Chassis to keep the soil-moisture sensor wiring neat:

Detailed view of the soil sensor board with wiring connected:

🧪 Pump debug loop

A quick debug that loops each water pump:

🌱 Full setup

Here’s the full prototype with sensors, pumps, bottles, and the Raspberry Pi:

Breadboard wiring showing the Arduino, multiplexer, and sensor connections.

Full overview of the system: sensors in soil bottles, pumps, and wiring all connected.

• Will update this post with a video currently later on..
• Currently I am awaiting of a new AC adapter for the relays, will also show the webserver as well.