|Frame||Realacc Martian IV (3 inch)|
|FC+ESC||HGLRC F4 Zeus|
|Motors||RCX H1304 5000KV|
Emax Avan 3×2.4×3
|Camera||RunCam Robin with 1.8 mm lens|
|DVR||RunCam Mini FPV DVR Module|
|Antenna||Realacc UXII Stubby RHCP antenna|
|Battery|| Tattu 3S 450 mAh 75C
Turnigy nano-tech 3S 850 mAh 45C
|Weight|| 121 g
164 g (with 3S 450 mAh battery)
|Flight time||4-8 minutes|
The RunCam DVR Module has an extra pad marked H/L which can be used to control the recording functionality. Betaflight supports having the recording start from arming (or other action) and then stop once disarmed (or other action). However, this isn't visible in the user interface and requires CLI configuration. Existing Betaflight documentation can be found from https://github.com/betaflight/betaflight/wiki/Pinio-and-PinioBox
The following command set the DVR to start recording when armed and stop when disarmed. As a bonus, there appears to be a 1-2 second delay at least when the recording stops after disarming.
resource MOTOR 6 NONE resource SONAR_ECHO NONE resource PINIO 1 A08 set pinio_config = 129,1,1,1 set pinio_box = 0,255,255,255 save
A08 refers to the S6 wire in the FC multiwire connector. It's mapped in the firmware to motor 6 and sonar echo which both need to first be released before pin i/o can be enabled for gaining DVR control.