購入ルート：
https://store.bicks.us/multiview/20-bicks-s-multiview-duo-fpv-camera-switcher.html
操縦用カメラを二つ機体に乗せたいという要望を頂き、このボードを使用した。通常前に操縦用カメラ、収録カメラが装備冴えているが、それに機体後方向きのカメラを設置。その２つのカメラをURAT経由で切り替えれるボードです。
Setting Up PINIO for Camera Switcher
The setup is explained very well in the official manual.
Basically, you need to find a spare UART, and remap the TX pin to PINIO. If you are unfamiliar with Betaflight Resource Remapping, see my tutorial.
For example, if UART 4 is free on my FC, I first need to free up the TX pin (A00 in this example);
resource SERIAL_TX 4 None
Then reassign that pin to a PinIO resource.
resource PINIO 1 A00
set pinio_box = 40,-1,-1,-1
save
resource LED_STRIP 1 NONE
resource PINIO 1 A08
set pinio_box = 40,-1,-1,-1
save