VTX

Digital Systems

Digital systems get their information through MSP. To configure a digital system such as Caddx Walksnail, DJI, and Betafpv P1, go to the Ports tab and under Peripherals, select MSP Displayport. Ensure the UART connection from the FC to the VTX is connected to the selected port (UART 5 in the example above).

Analog VTX

INAV supports IRC Tramp and TBS SmartAudio protocols for controlling analog VTXs. To enable it, select IRC or TBS SmartAudio under Peripherals as seen in the image above. Once selected, the option to change the band and channel will appear in the Configuration Tab.

IRC Tramp 1G3SE Setup

To use the Matek 1G3SE with IRC Tramp. You will need to enter the CLI command set vtx_frequency_group = FREQUENCYGROUP_1G3. You must also make sure that the initial VTx settings in the configuration tab are in a valid range. They are:

• vtx_band 1 or 2
• vtx_channel between 1 and 8

Note: The frequencies required by the US version of the VTx are on vtx_band 2 (BAND B) only.

Power levels are:

• 1 25mW
• 2 200mW
• 3 800 mW

Matek 1G3SE frequency chart

Band	1	2	3	4	5	6	7	8
A	1080	1120	1160	1200	1240	1280	1320	1360
B	1080	1120	1160	1200	1258	1280	1320	1360

Team BlackSheep SmartAudio

If you have problems getting SmartAudio working. There are a couple of CLI parameters you can try changing to see if they help.

• There is a workaround for early AKK VTx modules. This is enabled by default. You could try disabling this setting vtx_smartaudio_early_akk_workaround to OFF.

• If you are using softserial, you can try using the alternate method by setting vtx_smartaudio_alternate_softserial_method to OFF.

• If you are using TBS Sixty9 VTX you may consider to set count of stop bits to 1, using set vtx_smartaudio_stopbits = 1