Sensor Configuration

The sensor-level configuration (see Configuration Levels is read using the data I/O interface

Any configuration file/location path must be provided without its format extension, and relative to /config/sensors/

The possible configuration fields and their values are here exemplified for the case of a JSON format configuration (optional parameters are presented with default values and marked with '[o]' in their description):

{
  "inputs": [                               // List with input sources ("in0", "in1", ..., respectively) parameters
    {
      "interface": {                          // Hardware/virtual interface properties
        "type": "<library_name>",               // Path (without extension) to plugin with signal input implementation (loaded from MODULES_DIR/signal_io/)
        "config": "",                           // [o] Signal input/output device identifier passed to plugin initialization call
        "channel": 0                            // Device channel from which input values will be read
      },
      "signal_processing": {                  // [o] Internal signal processing options
        "rectified": false,                     // [o] Rectify signal if true
        "normalized": false,                    // [o] Normalize signal (after calibration) if true
        "min_frequency": -1.0                   // [o] Low-pass filter cutoff frequency, relative to (factor of) the sampling frequency (negative for no filtering)
        "max_frequency": -1.0                   // [o] High-pass filter cutoff frequency, relative to (factor of) the sampling frequency (negative for no filtering)
      }
    }, ...
  ],
  "output": "in0",                          // [o] String with math expression for conversion from sensor inputs to output (like "tanh( in0 - in1 )")
                                            //     Possible operations are the ones supported by TinyExpr library: https://codeplea.com/tinyexpr
  "log": {                                  // [o] Set logging of inputs and measurement numeric data over time
    "to_file": false,                         // [o] Save data logging to <log_dir>/[<user_name>-]<sensor_name>-<time_stamp>.log, to log file 
                                              //     Default value will set terminal logging
    "precision": 3                            // [o] Decimal precision for logged numeric values
  }
}