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IAQ Wired Sensor. Part of smart_household
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README.md README WIP 2023-11-08 22:26:38 +01:00

README.md

Indoor Air Quality sensor (wired version)

This repository contains all CAD files needed for making a Veles IAQ01 wired sensor:

  • Hardware: KiCAD project (schematic, PCB and exported Gerbers)
  • Firmware: STM32 IDE project
  • Enclosure: FreeCAD project

This sensor which is part of wider family of Veles Smart Household sensors.

Basic properties

Measured values

  • Carbon dioxide
  • Temperature
  • Relative humidity
  • Volatile Organic Compounds (VOC)

Connectivity

  • RS-485 with Modbus

Power requirements

  • Input voltage: 5 - 30 V DC

IAQ wired sensor render

Veles Smart Household

Goal of this project is to create FOSS hardware and software platform for measuring various quantities, not only related to indoor air quality:

  • temperature
  • humidity
  • atmospheric pressure
  • carbon dioxide (CO2)
  • carbon monoxide (CO)
  • volatile organic compounds (VOC)
  • particulate matter (PM - dust particles)
  • light intensity
  • soil moisture

... and some more!

Sensors are connected either via RS-485 Modbus or wirelessly to central unit. Wireless sensors are currently in development. Central unit may be any anything that can read from the bus: any computer with RS-485 to USB converter (e.g. Raspberry Pi) or an actual PLC. Readout of the sensor is possible via Modbus: either using your own favourite application or using your Python package.

We want this to be community effort! Come help us make something great!

Other Smart Household repositories

WIP

MODBUS Registers

Input Registers

Value Register
CO2 30010
SHT4x 30011
RH SHT4x 30012
T SCD4x 30013
RH SCD4x 30014
T SHT4x SIGNED 30015
T SCD4x SIGNED 30016

Holding Registers

Value Register
LED ON 40001
LED BRIGHTNESS 40002
LED SMOOTH 40003
CO2 ALERT LIMIT1 40004
CO2 ALERT LIMIT2 40005
SCD4x T OFFSET 40006
MODBUS ADDR 40007

Device Information Registers

Value Register
VENDOR NAME 30010
PRODUCT CODE 30011
REVISION 30012
PRODUCT NAME 30013
SERIAL NUMBER 30014