https://github.com/coniferconifer/ESP32-HX711-MQTT

Weight scale IoT by ESP32
https://github.com/coniferconifer/ESP32-HX711-MQTT

esp32 hx711 mqtt node-red scale tanita thingsboard weight wifi

Last synced: 3 months ago
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Weight scale IoT by ESP32

• Host: GitHub
• URL: https://github.com/coniferconifer/ESP32-HX711-MQTT
• Owner: coniferconifer
• License: apache-2.0
• Created: 2018-07-14T13:47:19.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2018-08-04T23:51:26.000Z (about 7 years ago)
• Last Synced: 2024-08-05T14:15:28.067Z (about 1 year ago)
• Topics: esp32, hx711, mqtt, node-red, scale, tanita, thingsboard, weight, wifi
• Language: C++
• Homepage:
• Size: 1.17 MB
• Stars: 11
• Watchers: 2
• Forks: 3
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-thingsboard - Weight scale IoT by ESP32

README

          
## Weight scale IoT by ESP32

Fig.1 shematics by Fritzing

![Fig.1 shematics by Fritzing](https://github.com/coniferconifer/ESP32-HX711-MQTT/blob/master/fritzing.png)

Fig.2 The weight scale remodeled by ESP32-HX711-MTT

![Fig.2 TANITA weight scale remodeled by ESP32-HX711-MTT](https://github.com/coniferconifer/ESP32-HX711-MQTT/blob/master/tanita.jpg)

### Legacy weight scale is remodeled into WiFi connected scale by ESP32

- The original control board with LCD is removed. Load cells and push button of the scale are re-used.

- ESP32 sends weight to MQTT server at port 2883. 

- Node-RED on raspberry pi splits incoming MQTT at 2883 to Thingsboard at port 1883

  and "slack" node to inform to my mobile phone.

Fig.3 slack

![Fig.3 slack](https://github.com/coniferconifer/ESP32-HX711-MQTT/blob/master/slack.png)

Fig.4 Node-RED running on raspberry pi 

![Fig.4 Node-RED](https://github.com/coniferconifer/ESP32-HX711-MQTT/blob/master/node-RED.png)

## remaining issues

- sometimes WiFi reconnection fails after wake up from deep sleep

  

## License: Apache License v2

## References

- [AVIA Semiconductor HX711 data sheet]https://www.mouser.com/ds/2/813/hx711_english-1022875.pdf

- [https://github.com/bogde/HX711] https://github.com/bogde/HX711

- [HX711 library for ESP32]https://github.com/SensorsIot/Weight-Sensors/tree/master/HX711 

- [#161 Measuring weight using an ESP32, a strain gauge, and a HX711]https://www.youtube.com/watch?v=iywsJB-T-mU

- [#194 IKEA Saltviken Scale Hack: Create a 150kg Scale Connected to Google Firebase (ESP32, ESP8266)]https://www.youtube.com/watch?v=14YmiEycup4

### PubSubClient

- [https://github.com/knolleary/pubsubclient](https://github.com/knolleary/pubsubclient)

### MQTT server with visiualization tools 

- [https://thingsboard.io/] (https://thingsboard.io/)