Articles

1. LoRa remote water tank level and pump controller: intro
2. LoRa remote water level and pump controller: server software
3. LoRa remote water level and pump controller: client software
4. LoRa remote water level and pump controller: server PCB
5. LoRa remote water level and pump controller: client PCB
6. LoRa remote water level and pump controller: entire server with 3D printed case
7. LoRa remote water level and pump controller: entire client with 3D printed case

Problem

First the problem: I must refill a 1,5Km far water tank, so I need two devices:

a server pump manager, that If the remote tank does not start the pump with a relay and when the tank is full, stop the pump.

• Start-stop pump;
• Manage the remote message;
• Prevent dangerous action if the remote device is no more active;
• Monitor to select an operation mode and status.

A client that is in a remote position (tank position) checks the water level and warns the Server if It’s all ok or the tank is full.

• Check the max and min level;
• Warn Server about status;
• Battery and solar-powered;
• Sleep mode if no more need.

Demo video

Messages

Here is a simple communication schema

Water tank level and pump controller LoRa messages.