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docs/Config_Reference.md
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@ -5226,6 +5226,32 @@ sensor_type:
## Board specific hardware support
## PCA9685 PWM Controller
The `[pca9685]` module enables a PCA9685 16-channel PWM controller over I2C, providing 16 virtual PWM pins for use with `[servo]` and `[output_pin]` modules.
This is useful for driving servos, LEDs, or other PWM devices like component feeders.
I2C is slow so those pins shouldn't be used to run anything time critical like driving stepper motors.
See the [example-pca9685.cfg](../config/example-pca9685.cfg)
file for an example.
```
[pca9685 my_expander]
i2c_address: 64
# default 64 (0x40), range: 64-127 (0x40-0x7F) depending on addr pins.
#i2c_mcu: mcu
#i2c_bus: i2c1
# See the "common I2C settings" section for a description of the
# above parameters.
#frequency: 50.0
# PWM frequency in Hz (default: 50.0, range: 1.0-1000.0).
# Use `50` for standard servos.
#invert_output: False
# Boolean (default: `False`). Sets MODE2 INVRT bit
# to invert all PWM outputs globally in hardware.
#totem_pole: True
# Boolean (default: `True`). Sets MODE2 OUTDRV bit for totem-pole output; if `False`, uses open-drain.
```
### [sx1509]
Configure an SX1509 I2C to GPIO expander. Due to the delay incurred by