Ri-ciao
esiste anche un fw opensource per i nostri modulini BT 
Alcune caratteristiche:
Full control of GPIO: input/output, configuring direction, pullups/pulldowns, etc.
Reading sampled from build ADCs.
Reading of temperature sensor.
Querying other system parameters.
Querying Bluetooth parameters.
Poll mode, when module automatically reads some sensor at specified period and sends information to host.
Ogni giorno mi stupiscono di più...