Using Caddx Micro SDR1 Camera with Betaflight Camera Control

The new Caddx cameras seem interesting, so I got a Micro SDR1 for myself to try out. Not so surprised, I ran into problems with Betaflight Camera Control.

The flight controller was a Matek F411-MINI which has a ready-to-use camera control pin(no need resistor and/or capacitor).  The OSD pin of the camera was directly soldered to the RSSI pin of the FC board and the resource remapping command was correctly set and saved according to Matek’s manual. But the Betaflight Camera Control didn’t work.

I switched to the joystick board came with the camera and verified the OSD of the camera was working. The FC was paired with a Runcam Micro Swift 2 before and the Betaflight Camera Control was working flawlessly. So both the FC and Caddx were all fine, it left the problem to software configurations.

Tried F1 and S1 settings with no luck.

Caddx.us Micro Turbo S1

Works perfectly on the default settings, no capacitor required.

set camera_control_internal_resistance = 470
set camera_control_ref_voltage = 325

Caddx.us Micro Turbo F1

This camera has usually low reference voltage, at least no sample, running up a 4S battery it showed 2.77 V, works perfectly otherwise. No capacitor required.

set camera_control_internal_resistance = 470
set camera_control_ref_voltage = 277

Couldn’t find anything on the net so I had to go through the troubleshooting section in the Betaflight wiki page. It turned out the internal resistance of the Micro SDR1 was different than other popular models. It seemed to be somewhere around 270 ohms. Below settings got it working(well, sort of).

Caddx.us Micro SDR1

set camera_control_internal_resistance = 270
set camera_control_ref_voltage = 328
set camera_control_key_delay = 180

Strangely, the Down command was still not working while others were working with some minor glitches. It was enough to get going with though.

If you are also struggling with using Caddx Micro SDR1 Camera with Betaflight Camera Control, feel free to try these settings, and if you find better settings please do let me know.

 

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