BDsensor:Connection Error

I have recompiled the Klipper, connect the pin to the BLTouch Port, but it give me "BDsensor:Connection Error"

I am using Super 8 Pro board with STM32H723, and the following config:

[BDsensor]

sda_pin: PC6 #white wire SDA

scl_pin: PC3 #Green wire CLK

delay: 18000 # this value should be not less than 18000 for STM32F103

z_offset:0 # this `z_offset` must be set as 0.

x_offset: -34

y_offset: 0

sample_retract_dist:0 # this `sample_retract_dist` must be set as 0.

#no_stop_probe: # enable this for fast probe, the toolhead will not stop at the probe point.

and here is the console:

BDsensor:Connection Error

M102 S-2



M102 S-1

How can I troubleshoot this issue?