PMD WiFi + Websockets, Webpage & Dashboard

🔘The 'PMD-Serial-UART', and 'PMD-Display' versions of our 'Particle Matter Detector' ( "PMD" ) were described in previous posts on 📅08.04.24, 16.06.24 & 01.01.25 *. A 🛜 'WiFi' version has now been added to the product range, which features an embedded 'Websockets Server' serving a webpage; ( enter websockets into the blog search bar to see examples of websockets servers & protocol ). Depending on the installed firmware the PMD can be configured as a Station on an existing 🛜WiFi network ( with or without a config web-portal ), or as a stand-alone Soft Access Point.

PMD - WiFi version: Note (L) air-intake & (R) micro-usb socket  

The webpage, ( designed using HTML, CSS, W3.CSS & JavaScript ), displays all the measurements made by the PMD's internal PMS5003 particle detector, ( particle density ug/m3, & particle number per deci-litre ppdl ), and additionally the 'Air Quality Index - AQI', and 'Air Quality Level - AQL', which are separately calculated from the concentration of 2.5 micron particles. All results are updated in real-time and displayed in tabular form on the webpage every second. There is also a bar meter showing the 🛜WiFi signal level, 🕓time/date stamp, and tapping the 'show/hide levels' button opens a pop-up showing the AQL categories - 'Good, Moderate, Poor, Unhealthy, Very Unhealthy, Hazardous & Extreme '.

Webpage: particle-matter-detector-v2.html

The webpage in the image above was being displayed by a browser on a laptop, having navigated to IP:192.168.1.54. 

A dashboard for the PMD, ( designed with Node-Red ), is shown below. Not all the measurements have had a widget assigned in this example, which is simply for demonstration purposes.

PMD dashboard - reduced set of measurements displayed

The latest issue of the PMD User Guide can be downloaded 🔗 here. 🔲

* A Bluetooth version with Android App is also available.