I picked up a Beta 2 version Herelink a few weeks ago. So far, I’m certainly impressed with the potential and the range performance. I’ve already installed it on a custom 9 kg quad frame, which I made sure to have provisions for the air unit in the winter.
I have noticed 2 issues during ground testing though that are making me scratch my head. First, it seems the HDMI input on the air unit is finicky. I’ve tried a variety of cameras and different style HDMI cords, and although I’ve had success, I’ve met a few compatibility issues. So far, I can easily transmit video from several GoPro models and even my laptop’s HDMI port. However, on some other cameras such as the SJCAM SJ6, SJ4000, and even a MAPIR Survey 3 (modified GitUp G3), I’ve had no luck. Now, I did confirm I can connect just about any TV to these cameras and get a live feed. When connecting to a TV, the screen on the camera itself does go blank to probably focus on the HDMI out, and this also happens when connecting to the Herelink. I’m assuming this means the camera is at least attempting to transmit video to the Herelink. I’ve also tried changing video between NTSC/PAL, different resolutions, and refresh rates. It’s kind of odd and I’m wondering if there’s any hidden settings in QGC to fix this. I’d focus on using a GoPro, but the SJCAM products have PWM control via the USB port which is essential for camera control.
The other issue I’ve noticed is that telemetry sometimes drops off if I power cycle the airframe without power cycling the ground unit. I can still configure settings, but the live telemetry on ground unit simply freezes to the last data sent before power cycling the airframe.