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WALTER. The automatic plant watering robot.

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To see an example of the operating project go to: walterbot.uk

About The Project

WALTER is a automatic plant irrigation system that works using a Raspberry Pi PICO.

The circuit includes an OLED panel to view the last measured soil moisture and last water more directly. It consists of three sections: the OLED panel, the soil moisture sensor and the pump. During operation the sensor takes readings once every 30 minutes and then triggers watering below a certain threshold level and for a certain duration. The results are then displayed on the circuit's OLED display and sent to the external server.

There is also a backend which runs on a seperate server. This records readings from the pico and displays this on a graph. It can also be configured through the .env files to disable watering and just act as a data logger and prevent the pico from watering remotely. This system also allows email notification of users to prompt checking of the reservoir.

Setting up

  • Pull the repository. Upload the pico folder to the pi pico and install a relevant sh1106 driver. Add a config.py formatted in the form of the example.config.py.

  • Upload the web folder to a suitable device to run the web server. Install dependencies and add a .env file formatted in the form of the example.env

  • Run the web server and then run the pico program.

TODO List of parts and circuit components.

Features

  • Automatic soil moisture data logging

  • Watering system based on soil moisture data

  • Web interface for displaying data and last watered information

  • Email notifications for alerts when watering occurs

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