uint64 timestamp	# time since system start (microseconds)

uint32 device_id

bool heater_on			# element driven this control period (controller_time_on_usec > 0)
bool temperature_target_met
bool temperature_activation_threshold_met

float32 temperature_sensor
float32 temperature_target

uint32 controller_period_usec
uint32 controller_time_on_usec

float32 proportional_value
float32 integrator_value
float32 feed_forward_value

float32 nominal_multiplier	# duty scaling from HEATERn_NOM_V: (V_nom/V)^2 above V_nom, 1 without compensation, 0 without battery data

uint8 MODE_GPIO  = 1
uint8 MODE_PX4IO = 2
uint8 mode

uint8 TEMPERATURE_SOURCE_IMU   = 0
uint8 TEMPERATURE_SOURCE_HYGRO = 1
uint8 temperature_source