KC868-AP ESPHome demo config for home assistant by ethernet

[admin]

# Example configuration entry with external clock enable and clock source from ESP32
pca9685:
- id: pca9685_hub1
external_clock_input: true

# Individual outputs
output:
# generate PWM from ESP32 ledc
- platform: ledc
pin: 25
id: extclk
min_power: 1
frequency: 40MHz

- platform: pca9685
pca9685_id: 'pca9685_hub1'
channel: 0

this is demo code from ESPHome, you can try to change the "frequency" to another value for a test.
details: https://esphome.io/components/output/pca9685.html