You were right ! I changed the sensor radio and it's working now ! But only if I have these lines in my sketch : #define MY_TRANSPORT_WAIT_READY_MS 1 #define MY_TRANSPORT_SANITY_CHECK #define MY_TRANSPORT_SANITY_CHECK_INTERVAL_MS (60*1000ul)

Great that you solved your problem, I still recommend to replace DHT22 to a a better sensor that uses less current consumption and also is working with a lower voltage. This will save plenty of money else spend on replacing batteries too often