extern fn null_sensor_data_func(
    _sensor: sensor_ptr, 
    _arg: sensor_arg, 
    _sensor_data: sensor_data_ptr, 
    _sensor_type: sensor_type_t) -> i32
    { 0 }
///  Define a default sensor data function in case there is none.
Define a default sensor data function in case there is none.
Define a default sensor data function in case there is none .
extern fn null_sensor_data_func(
    _sensor: sensor_ptr, 
    _arg: sensor_arg, 
    _sensor_data: sensor_data_ptr, 
    _sensor_type: sensor_type_t) -> i32
    { 0 }
extern fn null_sensor_data_func ( _sensor : sensor_ptr , _arg : sensor_arg , _sensor_data : sensor_data_ptr , _sensor_type : sensor_type_t ) -> i32 { 0 }
Define a default sensor data function in case there is none.
Define a default sensor data function in case there is none .
_sensor
sensor_ptr
_arg
sensor_arg
_sensor_data
sensor_data_ptr
_sensor_type
sensor_type_t
_sensor
sensor_ptr
_arg
sensor_arg
_sensor_data
sensor_data_ptr
_sensor_type
sensor_type_t