Telemetry Feature for Monochrome Remote Controllers

一、Telemetry

Telemetry is data received from the model that comes from various sensors. These sensors may be included in the radio receiver or flight controller, or they may be separate sensors such as GPS, variometer, or magnetometer. The received telemetry data can be displayed in widgets in EdgeTX, configured in alerts, or announced via audio.

The telemetry screen is where you configure these sensors in EdgeTX. Here are the configuration options:

1.1 Sensors

All previously configured sensors are listed here. The list can be collapsed by clicking the arrow icon to the right of the Sensors tab. When the sensor list is collapsed, the number of configured sensors will be displayed in parentheses, for example: (6).

Sensors that have not received data since the model was loaded or telemetry values were reset will display --- as the value. When a sensor receives a data update, a star * will flash to the left of the sensor value. A solid star * indicates that the sensor is receiving periodic updates. Sensors that no longer receive periodic updates will not be marked with a star *.

The following options are listed under the sensor list.

• Discover New Sensors: When selected, it will look for new sensors on the model and automatically configure them. If the sensor list is folded when discovering new sensors, the newly discovered sensors will be visible in the sensor list (old sensors will remain folded/hidden).
• Add New Sensor: When selected, it will create a new blank sensor that must be manually configured.
• Delete All: This option will delete all previously configured sensors.
• Ignore Instances: This option prevents multiple sensors from reporting the same telemetry data.

If you long-press the Enter button for a specific sensor, the following options will appear:

• Edit: Allows you to edit the sensor's configuration options.
• Copy: Creates a copy of the sensor.
• Delete: Deletes the sensor.

1.2 Receiver Status

The RSSI section of the telemetry screen:

Here, you can configure the threshold values for receiver alarms. The Rx-Stats tab will vary depending on the protocol used with the model (Rx-Stats, RSSI, Rqly, Sgnl).

• Low Alarm - The threshold at which the "RF Signal Low" voice prompt is played. Recommended value is 45.
• Critical Alarm - The threshold at which the "RF Signal Critical" voice prompt is played. Recommended value is 42.
• Disable Telemetry Alarms - When enabled, no alarm voice prompts will be played.

1.3 Variometer

The variometer detects changes in the model's altitude. EdgeTX can alert users to these altitude changes by providing ascending/descending tones. Use the Variometer menu on the radio settings page to set the actual frequency and volume of the tones to be played. The following options are used to configure variometer alerts.

• Source - Specifies the sensor to be used as the variometer. Selected from telemetry sensors added in the Sensors section.
• Range - Specifies the ascending/descending range that will trigger changes in the variometer beep tone. If the climb/descent rate is within the range specified here, the beep tone will change according to that value. When the range specified here is exceeded, the beep tone will stop changing. Units are meters/second or feet/second, based on the Units setting on the radio settings page.
• Center - Specifies the range to ignore climb/descent rate changes. When the climb/descent rate is within the range specified here, the beep tone will not change.
• Tone/Silence - Specifies whether to beep when the climb/descent rate is within the range specified in Center.

二、Sensor Configuration

The following options are available for configuring sensors:

• Name: The sensor's name - up to 4 characters.
• Type: Options are Custom or Calculated. Custom sensors are defined by hardware. Calculated sensors are sensors that are calculated using values from other sensors. For more information on calculated sensors, see below.
• ID: This number indicates the type of sensor. It consists of two parts. The first part is the ID number that defines the sensor type. The second part is the instance number of the hardware. If multiple sensors of the same type are configured, the instance number must be unique.
• Unit: The unit of the sensor. This unit is used when the sensor value is displayed on the screen or read out.
• Precision: Specifies the number of decimal places to display for the sensor value on the screen. The number is truncated according to this setting.
• Scale: Specifies the scale value to multiply the sensor value by, as required by certain sensors.
• Offset: Specifies the offset value to be added to the sensor value.
• Auto Offset: When selected, the first received value will be used as the offset. You can use the Reset Telemetry option to reset the offset for configured sensors.
• Positive Value: When selected, the sensor's value is only displayed when it is positive. When the sensor value becomes negative, zero is displayed.
• Filter: When selected, the sensor value becomes a rolling average of the last 5 received values.
• Log: When selected, the value of this sensor will be saved in a log file. SD card logging is configured in Special Functions or Global Functions.

Calculated sensors include the following additional configuration options:

• Formula: The type of calculation used. Options include:
  • Addition: Adds the values of up to 4 specified sensors.
  • Average: Calculates the average of up to four specified sensors.
  • Minimum: Finds the minimum value of up to 4 specified sensors.
  • Maximum: Finds the maximum value of up to 4 specified sensors.
  • Multiplication: Multiplies the values of 2 sensors.
  • Accumulation: Calculates the accumulated value of one sensor.
  • Battery Cell: This is the formula for FrSKY lithium battery sensors. It displays the voltage of the battery cell specified in the "Battery Cell Index" field.
    • If "Lowest" is specified in the "Battery Cell Index" field, the battery cell with the lowest voltage is displayed.
    • If "Highest" is specified in the "Battery Cell Index" field, the battery cell with the highest voltage is displayed.
    • If "Difference" is specified in the "Battery Cell Index" field, the voltage difference between the lowest and highest battery cells is displayed.
  • Consumption: Calculates power consumption (mAh) by accumulating the values of a current sensor.
  • Distance: Calculates the distance between the receiver and the radio using GPS sensor and altimeter values.
  • Source 1, 2, 3, 4: Provides the parameter values used in the formulas above.
• Persistence: When selected, the sensor value will be saved when switching models or turning off the radio.

三、Common Telemetry Sensors

The following sensors are commonly used and are typically automatically detected by EdgeTX:

————This article is cited from EdgeTX User Manual: https://zkl2333.gitbook.io/edgetx-user-manual/bw-radios/model-select/telemetry**