I have finally find a little bit of time to finish the build of my EasyIOT temp/humidity sensors, based on DHT22, each sensor send every 30 sec, a updated temperature and humidity value. Every sensor is based on arduino 3.3v@8mhz, plus LCD 2×8, DHT22 and ESP8266.
The pcb is very similar to wireless probe.
The idea of this project is to easy detect if the postman has put some letter’s in the box … or not. Problem, i live in a apartment, 3th floor, no communication link can be established between my apartment and the mailbox, Wifi networks are not available, ISM 433mhz, 2.4ghz link don’t work, GSM consumption is to high … but SigFox Akeru board work like a charm, amazing for only 25mw of output power with a lot of concrete and metal around…
Continuer la lecture de Postbox detector with SigFox Akeru board