Mois sensor node

Tip

You might want to read this document on our documentation space, all inline links will be working there.

Introduction

This firmware powers the Mois Box, based on the Arduino Yún Shield-compatible Dragino Yun Shield v2.4. Telemetry data is transmitted to a custom PHP receiver program over HTTP using the Yún HTTP Client from the Bridge Library for Yún devices. It is also stored locally on a SD card. The most recent firmware version is always available at node-yun-http.ino.

Platform and supported peripherals

Sensors

  • ADS1231 ADC weigh scale breakout board
  • DS18B20 digital thermometer
  • DHT22 (RHT03) digital humidity/temperature sensor
  • TSL25911 Ambient Light Sensor aka. TSL2591 High Dynamic Range Digital Light Sensor

Setup

Clone git repository

# Get hold of the source code repository including all dependencies
git clone --recursive https://github.com/hiveeyes/arduino

# Select this firmware
cd node-yun-http

Configure firmware

Have a look at the source code node-yun-http.ino and adapt feature flags and setting variables according to your environment:

Configure load cell calibration settings:

// Use sketches "scale-adjust-hx711.ino" or "scale-adjust-ads1231.ino" for calibration

// The raw sensor value for "0 kg"
const long loadCellZeroOffset = 38623;

// The raw sensor value for a 1 kg weight load
const long loadCellKgDivider  = 11026;

Tip

Read about Firmwares for load cell adjustment to get these values.

Build

Build for AVR

The build system is based on Arduino-Makefile, a Makefile for Arduino projects.

# Select appropriate Makefile
ln -s Makefile-Linux.mk Makefile

# Build firmware
make

Note

You might want to adjust the appropriate Makefile to match your environment.

Upload to MCU

make upload