Commonly asked questions

Uninverted and Inverted Sbus s.port R161 R81
The R161 has an Uninverted Sbus output that can be found on the solder point shown in the location below. This is only available on the R161. (A speci...
Wed, 25 Aug, 2021 at 5:37 PM
SI and SJ adding extra Pots or 2 pos Switches
SI and SJ are assignable slots in OpenTX for an extra two 2pos switches and an extra 2 analog pots.
Wed, 2 Dec, 2020 at 10:54 AM
VCP driver issue (TX not recognized on Windows 10 or later)
On modern Windows systems, there is a reported incompatibility with the virtual comm port that causes the computer to not see the radio. If you’ve already a...
Sat, 2 Apr, 2022 at 1:02 PM
How to install AG01 Mini gimbals in the Zorro Radio
Special thanks to John from RC Video Reviews.
Thu, 21 Apr, 2022 at 7:59 AM
Restoring SD Card Contents for RadioMaster Remote Controllers
Restoring SD Card Contents for RadioMaster Remote Controllers If your RadioMaster remote controller's SD card is corrupted, lost, or not functioning, f...
Tue, 6 May, 2025 at 5:21 PM
Understanding FLRC, LoRa, and FSK Modulation Techniques
Understanding FLRC, LoRa, and FSK Modulation Techniques In digital communication systems, FLRC (Fast Long Range Communication), LoRa (Long Range), and FSK ...
Wed, 7 May, 2025 at 3:54 PM
ExpressLRS PWM Receiver Setup and Configuration Guide
ExpressLRS PWM Receiver Setup and Configuration Guide ExpressLRS PWM receivers provide direct PWM output for controlling servos and ESCs without external c...
Wed, 7 May, 2025 at 4:01 PM
How to calibrate GX01 gimbals
Gimbals The GX01 gimbals in the GX12 radio come pre-calibrated from the factory. Calibration is ONLY necessary if the gimbals have been removed for mainten...
Wed, 14 May, 2025 at 11:41 AM