The T-LoRa Pager measures 106 x 89 x 23mm (4.2″ x 3.5″ x 0.9″), making it smaller than most modern smartphones. It has 2.33 ...

The ESP8266 and its heavyweight sibling the ESP32 ... sensor to read ambient temperature and atmospheric pressure. There’s also an SD card reader for local data storage, a 1602 LCD display ...

Particulate matter is measured by an SDS011 particulate matter sensor. This device contains ... The build makes use of an ESP32 as the brains of the operation, chosen for its onboard networking ...