¶ Extenders
¶ Overview
Experimental! This is not supported on the main code yet. Use PR337
Pin extenders add pins via external chips. They are more limited than standard ESP32 GPIO.
¶ PCA9539 & PCA9555
- i2c:
- sda: I2C data signal
- Type: Pin
- Range: Native ESP32 gpio
- scl: I2C clock signal
- Type: Pin
- Range: Native ESP32 gpio
- bus:
- Type: Integer
- Range:
- frequency: I2C clock frequency
- Type: Integer
- Range:
- sda: I2C data signal
- extenders:
- pinextender0:
- i2c_extender:
- device:
- Type: Enum
- Range: PCA9539 or PCA9555
- device_id: Use this to set the address of the chip.
- Type: Integer
- Range: See chip data sheet (typically (0-2)
- interrupt:
- Type: Pin
- Range: Native ESP32 only
- device:
- i2c_extender:
- pinextender0:
¶ Example Configuration
i2c:
sda: gpio.14
scl: gpio.13
bus: 0
frequency: 100000
extenders:
pinextender0:
i2c_extender:
device: pca9555
device_id: 0
interrupt: gpio.16
¶ Using an extended pin
limit_neg_pin: pinext0.0
¶ Example hardware
