This is part of a project that was a product of a company myself and a few friends started out of university. The project was an automated (Internet of Things) based Rainwater, Greywater and Irrigation Smart System.

The system is able to smartly manage your house’s water supply by alternating between rainwater and municipal water – depending on the level of water in your tanks. It also smartly determines which water sources (Greywater, rainwater, municipal) will be used for irrigating your garden.

The system comes with a mobile app (available on iOS and android usng Ionic) that allows you to:

• Check your greywater and rainwater levels
• ‘Zone’ your garden, for irrigation
• Manage your system (backwashes, irrigation schedules etc.)

The system was also designed to be smart enough to make decisions based on the weather at your location (if it is raining, it will not irrigate). Unfortunately we never got around to fully implementing this functionality.

Also (rather unfortunately), myself and my co-founder had a bit of a meltdown as he wanted to focus on 'non-smart' such systems, and I wanted to go ahead with this. Thus I was edged out and this smart system project left in the past. So, in short, I am open sourcing all of the code in the hope that someone may find it of interest if they are trying to do something similar - it is quite rusty as it was a version 1, but it worked well enough and we actually have 3 systems still up and running and working with the app at time of writing.

• This repo is only one aspect of the project as a whole, it is the ionic app, which uses the MQTT protocol to communicate with various systems (depending on user) and with the Node JS backend, which is also an MQTT client

• Node backend which serves as another MQTT client to relay commands from the ionic clients to the systems themselves. The main business logic (scheduling for irrigation, backwashing etc.) is done here. - see https://github.com/peter-stuart-turner/iot-water-management-backend
• MQTT broker, we used Amazon's CloudMQTT for this, but were in the process of writing our own broker using Mosca when myself and my co-founder had the meltdown. - see https://www.cloudmqtt.com
• C++ scripts that ran on Arduinos (micros I think they were). Each system was controlled by an Arduino with a connected GPRS chip, the chip allowed for the Arduino's to also be MQTT clients which could talk to the apps and backend over our local cellular networks (Vodacom). The systems continuously monitor and broadcast water levels to backend over MQTT and GPRS (using ultrasonic distance sensors), the backend then updates Firebase so that the app can inform users of their realtime water levels. - see https://github.com/peter-stuart-turner/iot-water-management-embedded-systems
• Firebase, we used the Firebase real time database (this was before the time of Firestore) as our main database, in which we stored our client and system information (keys, profiles etc.) as well as our real-time data such as tank levels - which the ionic mobile apps could read.

Because of all of the various parts, (backend, broker, hardware) this project will likely not work out of the box. The app should work, but will not be linked to any systems. The repo is actually more to be used as a guideline as to how we went about building the systems, so that you can use it for educational purposes - and use bits of code you may want (MQTT, weather service etc. )

If you are interested in this project, please do not hesitate to reach out to me, and I will help you out as best I can.