Symmetric buffers allow a much more reliable QGC Wifi telemetry connection especially when (virtual) joysticks are used. (this board does not provide RX DMA on UART 4 as its timer does DSHOT).
- on common IMUs like the mpu6000, mpu9250, icm20602, etc each FIFO
sample is only 12 bytes so this is still more than large enough for the
worst case transfer
achim