sensors: Cleanup warnings and debug code

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
server: Cleanup warnings and debug code

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
sensors: Start setup for cached sensors

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
sensors: Rename loadSensors to initSensors

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
sensors: Update cache regularly

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
remove gpio dependency again

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
hardware: Manually handle gpio pin exporting

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
sensors: Properly set alarm and panic states

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>
sensors: read status from sensor data

Signed-off-by: Kai Blin <kai.blin@biotech.uni-tuebingen.de>