OpenTX - Application Note 22
Current Sensor - Smart Port - 40A
Install the FrSKY 40A current sensor to measure battery current, voltage, power, and consumed power. Display these values on a Taranis telemetry screen and announce the consumed power. Log and display the logged data in OpenTX Companion.
The current sensor is connected between the battery and the ESC. Connect the Smart Port cable between the sensor and the receiver.
Set Up the Telemetry Display
On the Taranis Telemetry Set Up screen, set up the parameters with the ranges shown here.
The parameter values are described here.
Viewing the Telemetry Display
Telemetry screen 3 looks like this.
Low Voltage Alarms
Note that the FLVSS voltage sensor also measures battery voltage and can create low voltage alarms. (Refer to Application Note 19.)
Two alarm types are required. Each alarm uses a logical switch to compare voltages and a special function to announce the alarm. These are the messages and file names.
To create the audio files, see Application Note 4.
The voltages in this example are for a 4S battery in an aerobatic Slick 360 plane. Choose the voltages that suit your battery and aircraft type.
The logical switches are as follows.
Note that the voltage has to be less than the reference for more than six seconds before the logical switch becomes true. This is to prevent short term high battery loads from causing alarms.
The special functions are as follows.
Test the alarms by flying until a low battery alarm is announced. Land and check the battery. Adjust the reference voltages if necessary.
Logging and Viewing Telemetry Data
Refer to Application Note 8 – GPS Sensor for details on recording telemetry data in a log file and viewing it using OpenTX Companion.