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Watermeter reader wifi/ethernet

I know there is a lot of esp code which allow to catch watermeter pulse but this one is a little bit different.

My watermeter is far from my house and under the ground. With the use of an ethernet cable with poe support, it now possible for me.

Features

  • Connected to your network using ethernet or wifi.
  • Send data to MQTT broker
  • Send the exact index and not only a pulse
  • Set index using MQTT (over the air index update)
  • Autodiscovery for Domoticz or Home Assistant
  • OTA support for programming

Hardware

  • Nodemcu V3
  • W5500 Ethernet shield lan
  • LJ18A3-8-Z M18 inductive sensor 5V
  • micro usb poe splitter (if you need poe support)
  • some 3D printed parts for the box and sealing (not mandatory)

Wiring

In progress

Pictures

https://github.com/Turbox35/NodemcuWatermeter2MQTT/blob/main/pictures/picture1.jpg

How to deploy

Use Arduino IDE, install ArduinoJson (7.0.4 minimum) and PubSubClient (2.8) libraries.

Select NodeMCU 0.9 board

Modify the parameter at the beginning of the code:

  • Select network
  const int setnetwork = 1;

set value to 2 if you use wifi

  • Wifi setting
  const char* WIFI_SSID = "YOURWIFISSID"
  const char* WIFI_PASSWORD = "YOURWIFIPASSWORD"

ignore if you use ethernet connection

  • Ethernet setting
  #define CSPIN 16

W5500 connection

  byte mac[] = {0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02}

Modify it you have an issue or multiple similar devices

  • MQTT setting
  const char* mqttServer = "192.168.3.9"; // The  IP of your MQTT broker
  const int mqttPort = 1883; //The port of your MQTT broker
  const char* mqttUser = "admin"; //The user of your MQTT broker
  const char* mqttPassword = "mosquitto35*"; // The password associated to the user
  const char* autodiscoveryTopic = "homeassistant"; //The auto discovery topic
  const char* topic = "nodemcudata"; //The MQTT topic
  const int availabilitydelay = 60000; //set time in milisecond of the availability mqtt publish

adapt to your MQTT broker

  • Sensor setting
  int sensorNumber = 1; //change the sensor number if you have multiple device using this code
  const char* deviceName = "watermeter";

Important to change if you have multiple device with the same code on your network

License

MIT

FAQ

How to set the new index over the air?

In progress

How to update firmware using OTA?

In progress