*Correction, the Avian ESC doesn't require a Spektrum SMART battery to transmit battery voltage*
Lets setup flight pack voltage telemetry monitoring on the RadioMaster TX16S with EdgeTX 2.8.5. Receiver is a Spektrum AR631 with a Spektrum Avian SPMXAE30B Smart Lite 30A brushless ESC. Battery is a Spektrum 3S 2200 Smart battery. We will find the value, calibrate the voltage with a reference voltmeter, setup a low voltage alarm, create a display widget to show voltage, and create a special function for voice call outs of the battery voltage.

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Video and audio recorded with a RunCam 2 4K.
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Filmed with the Sony HDR-CX405 camcorder
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RadioMaster TX16S transmitter
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Hobbyzone AeroScout S2 1.1m BNF
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Spektrum Avian 30-Amp Smart Lite ESC
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Spektrum 3S 2200mAh Smart LiPo Battery
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Spektrum 4S 2200 G2 battery
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Spektrum SPMA3065 USB Adapter
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Pokit Pro multimeter, datalogger, and oscilloscope!
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0:00 Intro
0:35 Discover Values
1:15 Flight Batt Calibration
3:10 Display Widget
4:30 Low Voltage Alarm
8:48 Monitor Cell Voltage
11:45 Verbal Voltage Call Out
13:23 Conclusion