SIGFOX PRODUCTS
This device was designed primarily as a miniature sport-events tracker, but regarding all its integrated functionnalities (GPS, Bluetooth, induction charger, temperature, humidity and pressure sensor, accelerometer, magnetometer), it can actually be used for any tracking or surveillance application. It's footprint was reduced to the absolute minimum (42x30mm), as so was its power consumption...
This device was designed to measure ground temperatures at different depths and send them using the Sigfox network to supervise the growth conditions of crops (e.g. asparagus, potatoes, ...) and estimate the best moment for harvest.