For earlier batches V2/V21 ESC, if you're running BLHeli32 Rev32.8 firmware, please don't enable bidirectional DShot in Betaflight. To use the bidirectional DShot feature, make sure to upgrade to Rev32.9 firmware. V22 ESC doesn't have the issue. Learn more
SpeedyBee BLHeli32 45A 4 in 1 ESC Specifications
BLHeli32 SpeedyBee 4in1
45A * 4
3-6S Note: Strongly recommended to solder the filtering capacitor between VBAT"+" and" -"