Troubleshooting

Yep tried with decoupling capacitor, i didn't had 4,7 at home but tried with 2,2 and 10, nothing, Triede with 2 uno, one mega and one diecimila and 2 nano's and 11 nrf24l01 (one with external antenna). And no matter what i try, i can only get 3 boards/antenna's to work... So i have ordered some new antenna's and will buy 4,7 decoupling capacitor's soon...

@MisterE Good! If you try the "broken" radio with a capacitor it will probably work fine.

the sensor.h was in the good directory but i installed again the arduino software and now everything works great Thank you

@karenbobiv I doubt it's related to the MySensors communication. Are you using a Dallas temp sensor? Could you check that the is actually connected to the dallas sensor by using isConnected(). When googling your problem I found a few hits on -196.6 which is the error code (DEVICE_DISCONNECTED) converted to Fahrenheit. Start debug mode (Config.h) to see what the sensor actually sends.

got it, thanks. I was including the folder arduino-master in the path. thanks!