Very much a Newbie on Home Assistant, but I think I have done everything right. I am trying to get a 16 digital input card that uses a PCA9535 to connect over I2C
This is a fresh install of Home Assistant 2021.9.4 on a Raspberry Pi4, I then enabled I2C following the SD card instruction here:
Using lsmod | grep i2c
as described above I think shows that I2C is working and finding two devices, I guess the card and Pi4:
i2c_dev 20480 2
i2c_mux_pinctrl 16384 0
i2c_mux 16384 1 i2c_mux_pinctrl
i2c_bcm2835 16384 1
I found the i2c address by booting in Raspberry Pi OS and running i2cdetect -y 1 which gave me the i2c address at 0x26.
Then I used this to add lines to configuration.yaml
binary_sensor:
- platform: rpi_gpio
ports:
11: PIR Office
12: PIR Bedroom
- platform: pcal9535a
i2c_bus: 1
i2c_address: 0x26
pins:
0: Test1
1: Test2
The rpi_gpio seem to be working and have ticks against them in the Entities section, but the i2c input don’t show up. Gong to Configuration/Logs I get this error message:
Logger: homeassistant.components.binary_sensor
Source: components/pcal9535a/binary_sensor.py:46
Integration: Binary sensor ([documentation](https://www.home-assistant.io/integrations/binary_sensor), [issues](https://github.com/home-assistant/home-assistant/issues?q=is%3Aissue+is%3Aopen+label%3A%22integration%3A+binary_sensor%22))
First occurred: 1:59:13 PM (1 occurrences)
Last logged: 1:59:13 PM
Error while setting up pcal9535a platform for binary_sensor
Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 249, in _async_setup_platform await asyncio.shield(task)
File "/usr/local/lib/python3.9/concurrent/futures/thread.py", line 52, in run result = self.fn(*self.args, **self.kwargs)
File "/usr/src/homeassistant/homeassistant/components/pcal9535a/binary_sensor.py", line 46, in setup_platform pcal = PCAL9535A(bus, i2c_address)
File "/usr/local/lib/python3.9/site-packages/pcal9535a/pcal9535a.py", line 59, in __init__ 0: self._bus.read_byte_data(self._i2c_address, 0x46),
File "/usr/local/lib/python3.9/site-packages/smbus/util.py", line 59, in validator return fn(*args, **kwdefaults)
File "/usr/local/lib/python3.9/site-packages/smbus/smbus.py", line 132, in read_byte_data raise IOError(ffi.errno)
OSError: 121
So I am way out of my depth to trace and fix the problems, HELP!!
Thanks
B