Online Particulate Matter Sensor (Temperature/Humidity as well)

thingiverse

Edit 03/06/17 Added a sturdier version (v0.6) with thicker walls and better support for nodeMCU. 3D printing produces particulate while heating plastics, especially ABS. There are several approaches to mitigate this health risk using HEPA filters, activated carbon, or venting the air outside. Honestly you just assume the efficiency of any filtering method so the only way to know is to measure it. This device is based on PlanTower PMS5003 dust sensor. This laser dust sensor can sense particulate starting from 0.3 µm and above, and has a reasonable price/efficiency ratio so that you can determine if your air is heavily polluted or not. Trust me, smell is not a good way to do that. Measurement is displayed on the LCD screen which provides real-time temperature, humidity, calculated AQI (Air Quality Index check https://en.wikipedia.org/wiki/Air_quality_index ) and PM 1.0 In addition it sends every data to thingspeak every minute or to a MQTT broker depending on options activated in the source code. You need to create a thingspeak free account, create two channels according to the ino file and get the write API code into the ino file before compilation. You also need to put a wifi SSID and password as well. BOM: PlanTower PMS 5003 (20~30 € on ebay). Datasheet available here: http://www.aqmd.gov/docs/default-source/aq-spec/resources-page/plantower-pms5003-manual_v2-3.pdf?sfvrsn=2 LCD 1602 with I2C interface (2~3 € on ebay) DHT11 or DHT22 (1~5 € on eaby) 10 kohm resistor NodeMCU 1.0 (around 5 € on ebay) Dupont connector set (some €) Dupont Crimping tool (from 10 € to 50 € or more, quality may vary a lot !!) The wiring is described in one of the images, the Fritzing fzz file is provided as well. NodeMCU coding relies on Arduino ESP8266 board addition available with installation instructions from https://github.com/esp8266/Arduino Code is available on https://github.com/ChrisP-Git/PartSense. The code improves and supports ThingSpeak, MQTT brokers and Domoticz feeding through MQTT now.. Just print both parts, put the different parts inside the different positions using Dupont connectors to make clean wiring. The cover needs to be screwed to body then can be screwed under the top of your enclosure. This device is experimental and is a first step it may be improved and remixed please share your makes or what you have done from it