microflo-luftdaten

This repository provides a MicroFlo powered firmware for the luftdaten.info air quality sensor.

Open in Flowhub

Status

In production.

• One sensor deployed outside c-base, see public data
• One sensor deployed in c-base main hall, data visible in c-base crew network

Hardware

• ESP8266 microcontroller
• SDS011 fine particle sensor.
• DHT22 temperature and humidity sensor

See luftdaten.info for details and the wiring plan.

SDS011 datasheet

Connectivity

The firmware only sensor readout and conditioning on the data, and then transmit it over WiFi/MQTT. Data logging and processing is done using MsgFlo components on the message queue.

Basic idea is to:

• Have a Python component for uploading latest information to luftdaten.info via HTTP API
• Store air quality information in InfluxDB using cbeam-telemetry-server
• Visualize in OpenMCT dashboards, and with the infoscreens around the station
• Potentially trigger alerts using custom Python logic

The MsgFlo side of this integration is in the c-flo repository.

MQTT connectivity is handled by the MicroFlo ESP8266 MsgFlo integration.