Hi. I am late here but i will ask anyways. So what is the review between PMS7003 and Honeywell HPM sensors?
I'd like to build a low cost opensource AQI device for Indian cities with added temperature, humidity and ambient pressure data and then send it to cloud using GPRS/GSM or Wifi (esp8266 as MCU). But i am confused about the Honeywell HPM sensor - its accuracy as compared to BAM or other PM measurement standards. Any help will be great!