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Load Cell Occupancy Sensor

This project is a occupancy sensor that uses a load cell for couches and beds, transmitting data to my Home Assistant server via MQTT

WIZnet

Published February 21, 2023

Original author: alexOriginal source (new tab)

Load Cell Occupancy Sensor

Components

Hardware components
W5100

WIZnet - W5100

x 1

Project description

DETAILS Overview Load cells → HX711 (ADC) → ATMega328P (MCU) → W5100 (Ethernet) → MQTT Broker → Home Assistant This sensor takes input from 4 load cells, each supporting one leg of a bed or couch. The load cells are sampled with a ATMega328P (Arduino) using an HX711 load cell ADC. These samples are then transmitted to an MQTT broker via the Wiznet W5100 (same as Arduino Ethernet shield). Project Contents LoadCell_ArduinoCode – firmware for the ATMega328P LoadCell_Case – 3D printable case designed in OpenSCAD LoadCell_Holder – 3D printable holder for the load cells designed in OpenSCAD…

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