https://github.com/dgomes/pico_w_water_meter

Water Meter using Raspberry Pico W
https://github.com/dgomes/pico_w_water_meter

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Water Meter using Raspberry Pico W

• Host: GitHub
• URL: https://github.com/dgomes/pico_w_water_meter
• Owner: dgomes
• Created: 2023-02-24T19:24:52.000Z (almost 2 years ago)
• Default Branch: main
• Last Pushed: 2024-01-08T14:23:45.000Z (12 months ago)
• Last Synced: 2024-01-08T16:09:42.337Z (12 months ago)
• Language: Python
• Size: 777 KB
• Stars: 11
• Watchers: 4
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Water Meter Sensor

Monitor your water usage through an energy-efficient IoT device attached to your water provider meter (which happens to have a metal "butterfly wheel) like the JANZ JT400:

![Water Meter](media/jt400.jpg "Water Meter")

![Water Meter](media/fitted.jpg "All in place")

This project enables you to monitor the water usage of your household water usage through the use of a DIY water meter sensor built using:

- [Raspberry Pi Pico W](https://www.raspberrypi.com/documentation/microcontrollers/raspberry-pi-pico.html)

- [Inductive Proximity Sensor Detection Switch - TL-W5MC1](https://www.aliexpress.com/item/32973109912.html)

- [TI High-Speed CMOS Logic 14-Stage Binary Counter](https://www.ti.com/lit/ds/symlink/cd54hc4020.pdf)

The RPI Pico W is very flexible in terms of power requirements, but in my case, I use:

- 18650 Battery

- [18650 TP4056 Lithium Battery Charger Module With Protection](https://www.aliexpress.com/item/32930640893.html)

- [Mini Boost Module Step Up Board 5V](https://www.aliexpress.com/item/4000626913742.html) (to power the Inductive Proximity Sensor which states minimum 6V but actually works with 5V)

Just assemble everything :)

![Box with PCB and Battery inside](media/prototype.jpg "Prototype")

You can find the PCB source files (KiCAD) in the respective directory. ([PCB files](https://github.com/dgomes/pico_w_water_meter/tree/main/Water%20Meter%20PCB))

I designed a 3D-printed adapter for the Inductive Proximity Sensor to fit the JANZ JT400.  ([3Dadapter](https://github.com/dgomes/pico_w_water_meter/tree/main/3Dadapter))

The RPi Pico W is flashed with a micropython firmware and then you upload the project available in `src`

You must have an MQTT broker (e.g. Mosquitto)

The project automatically integrates with [Home Assistant](https://www.home-assistant.io)

# config.py

You will need to create an additional file called `config.py` that must include the variables:

```python

SSID = "myhome_network"

WIFI_PASSWORD = "blablabla" 

SERVER = "192.168.1.1"  #this is your MQTT Broker Address

USER = None #change this to your MQTT username, else leave None

PASSWORD = None #change this to your MQTT password, else leave None

```

# Powering

- Using a 18650 3.7v battery the sensor can run for 2 weeks

- Using a battery pack of 4 AA batteries the sensor can run for 4 weeks