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:beginner: Home Assistant Operating System
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No /dev/i2c devices (i2c-dev not loaded) #142

Closed termdude closed 5 years ago

termdude commented 6 years ago

I have a 1-wire to i2c board based on i2c-bcm2708 which also requires i2c-dev to be loaded. I have managed to load i2c-bcm2708 by adding a reference to it on a CONFIG usb stick, but i2c-dev just won't load and it doesn't show any error messages. The i2c-dev module is available in HassOS. The same setup worked just fine with ResinOS. I have added dtparam=i2c1=on and dtparam=i2c_arm=on in config.txt.

beewebmeister commented 6 years ago

Same issues with rpi 3b+ (both 32 and 64 bits), latest HassOS Please help fixing it. Thanks.

pvizeli commented 6 years ago

Can you try a module load config?

pvizeli commented 6 years ago

https://github.com/home-assistant/hassos/pull/147 (That should work)

pvizeli commented 6 years ago

ping

termdude commented 6 years ago

This is exactly what I have tried, but it hasn't worked.

beewebmeister commented 6 years ago

I followed your advice but it does not work. I was not able to write in /etc/module-conf.d permanently, after reboot the file disappears. Thanks.

beewebmeister commented 6 years ago

I decided to start from beginning with a new microSD.

I downloaded Hassos (hassos_rpi3-1.9.img.gz). I wrote the image on a microSD (Samsung 32 EVO plus) using Etcher. I added to config.txt the following: dtparam=i2c1=on dtparam=i2c_arm=on dtoverlay=pi3-disable-bt

then booted. After 20' the system was up. Just these warnings:

Timer got out of sync. Resetting 10:32 core.py (ERROR) Setup of config is taking over 10 seconds. 10:32 bootstrap.py (WARNING)

I installed the ssh (SSH server 3.7) addon from the official addons. At this point I connected using putty to the host. The /dev/i2c* is not present. In the next lines the output of some common commands:

lsmod:

Module Size Used by Tainted: G nf_conntrack_netlink 36864 0 nfnetlink 16384 2 nf_conntrack_netlink bnep 20480 2 hci_uart 36864 1 btbcm 16384 1 hci_uart serdev 20480 1 hci_uart bluetooth 364544 24 bnep,hci_uart,btbcm ecdh_generic 28672 1 bluetooth sch_fq_codel 20480 3 brcmfmac 307200 0 brcmutil 16384 1 brcmfmac cfg80211 569344 1 brcmfmac snd_bcm2835 32768 0 snd_pcm 98304 1 snd_bcm2835 rfkill 28672 4 bluetooth,cfg80211 snd_timer 32768 1 snd_pcm snd 69632 3 snd_bcm2835,snd_pcm,snd_timer uio_pdrv_genirq 16384 0 uio 20480 1 uio_pdrv_genirq fixed 16384 0

cat /proc/modules:

nf_conntrack_netlink 36864 0 - Live 0x7f520000 nfnetlink 16384 2 nf_conntrack_netlink, Live 0x7f516000 bnep 20480 2 - Live 0x7f50c000 hci_uart 36864 1 - Live 0x7f4fd000 btbcm 16384 1 hci_uart, Live 0x7f4f6000 serdev 20480 1 hci_uart, Live 0x7f4ec000 bluetooth 364544 24 bnep,hci_uart,btbcm, Live 0x7f480000 ecdh_generic 28672 1 bluetooth, Live 0x7f476000 sch_fq_codel 20480 3 - Live 0x7f46d000 brcmfmac 307200 0 - Live 0x7f347000 brcmutil 16384 1 brcmfmac, Live 0x7f32f000 cfg80211 569344 1 brcmfmac, Live 0x7f0fb000 snd_bcm2835 32768 0 - Live 0x7f0ee000 (C) snd_pcm 98304 1 snd_bcm2835, Live 0x7f0cb000 rfkill 28672 4 bluetooth,cfg80211, Live 0x7f0a4000 snd_timer 32768 1 snd_pcm, Live 0x7f096000 snd 69632 3 snd_bcm2835,snd_pcm,snd_timer, Live 0x7f07c000 uio_pdrv_genirq 16384 0 - Live 0x7f04c000 uio 20480 1 uio_pdrv_genirq, Live 0x7f010000 fixed 16384 0 - Live 0x7f000000

dmesg |grep i2c:

nil

ls -l /dev/i2c*:

ls: /dev/i2c*: No such file or directory

I added the platform htu21 to the configuration file, the only entry I inserted to the default configuration.yaml. As expected the error

FileNotFoundError: [Errno 2] No such file or directory: '/dev/i2c-1'

is there.

I confirm that the kernel module folder /etc/modules-load.d is NOT persistent, I added the configuration file in this folder but after rebooting it was not there.

For sure I'm missing something. Sorry for the long post, I hope this can help you in understanding what is going wrong.

Thanks.

termdude commented 6 years ago

I managed to get modules (except i2c-dev) to load by using a config usb stick (https://github.com/home-assistant/hassos/blob/rel-1/Documentation/configuration.md#automatic). Remember to name the stick CONFIG (or it won't load), and att your module conf file in /modules. Then restart the HassOS RPI.

pvizeli commented 6 years ago

@beewebmeister you need connect to host and not with ssh add-on. You can also use the terminal from hdmi

beewebmeister commented 6 years ago

Well, at the end I was able to load the i2c module. I connected to the physical machine (I mean, keyboard, mouse and monitor) and added to the folder /etc/modules-load.d the file rpi-i2c.conf with the following content:

i2c-dev i2c-bcm2708

in the config.txt I added dtparam=i2c1=on dtparam=i2c_arm=on

after rebooting the /dev/i2c-1 is present. Thanks.

Now I have got a new error:

HTU21D sensor not detected in bus 1 components/sensor/htu21d.py (ERROR)

I'll take a look to it in the next weeks; maybe a wrong wiring. Is it possible to install i2c-tools on the host? How can I install i2c-tools?

Thanks

termdude commented 6 years ago

My issue has been solved, by manually adding a file in /etc/modules-load.d named rpi-i2c.conf.

When using the config USB stick (as suggested by the documentation), the content from the file in /modules/rpi-i2c.conf was copied to a file /etc/modules-load.d/* (asterisk). This way the modules weren't loaded, so I suspect a bug in the USB stick handling?

brunofosi commented 6 years ago

My issue has been solved, by manually adding a file in named rpi-i2c.conf.

When using the config USB stick (as suggested by the documentation), the content from the file in /modules/rpi-i2c.conf was copied to a file /etc/modules-load.d/* (asterisk). This way the modules weren't loaded, so I suspect a bug in the USB stick handling?

how did you manage to resolve this? manually create /etc/modules-load.d/rpi-i2c.conf after booting hassos using hdmi and a usb keyboard as console? and with a CONFIG usb create the config.txt with the follwing:dtparam=i2c1=on dtparam=i2c_arm=on dtoverlay=pi3-disable-bt ?

How can I install i2c-tools?

i also want to know that! if someone knows how to

termdude commented 6 years ago

I simply ssh:d to the host (https://developers.home-assistant.io/docs/en/hassio_debugging.html) and created the file with vi (vi /etc/modules-load.d/rpi-i2c.conf).

brunofosi commented 6 years ago

after a bit of struggling with the authorized_keys generated by Putty! i managed to ssh hassos and what i did, was rename the `mv /etc/modules-load.d/ /etc/modules-load.d/rpi-i2c.confand edited the mnt/boot/config.txt with the followingdtparam=i2c1=on dtparam=i2c_arm=on dtoverlay=pi3-disable-btand it started working! but i noticed that running the commandhassio hw info` it doesn't show up any i2c hardware, but indeed the BME680 is now working with no errors on the log

Fusseldieb commented 6 years ago

Adding those things in config.txt and adding that rpi-i2c.conf made a /dev/i2c-1 device appear, but Home Assistant doesn't recognize it. It throws:

Error while setting up platform rpi_gpio_pwm
Traceback (most recent call last):
  File "/usr/local/lib/python3.6/site-packages/homeassistant/helpers/entity_platform.py", line 128, in _async_setup_platform
    SLOW_SETUP_MAX_WAIT, loop=hass.loop)
  File "/usr/local/lib/python3.6/asyncio/tasks.py", line 358, in wait_for
    return fut.result()
  File "/usr/local/lib/python3.6/concurrent/futures/thread.py", line 56, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/local/lib/python3.6/site-packages/homeassistant/components/light/rpi_gpio_pwm.py", line 77, in setup_platform
    driver = Pca9685Driver(pins, **opt_args)
  File "/usr/local/lib/python3.6/site-packages/pwmled/driver/pca9685.py", line 22, in __init__
    self._device = PCA9685(address)
  File "/usr/local/lib/python3.6/site-packages/Adafruit_PCA9685/PCA9685.py", line 74, in __init__
    self._device = i2c.get_i2c_device(address, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/Adafruit_GPIO/I2C.py", line 63, in get_i2c_device
    busnum = get_default_bus()
  File "/usr/local/lib/python3.6/site-packages/Adafruit_GPIO/I2C.py", line 55, in get_default_bus
    raise RuntimeError('Could not determine default I2C bus for platform.')
RuntimeError: Could not determine default I2C bus for platform.

(HassOS 1.11 x64)

I think I'll go back to ResinOS. Reply me if someone figured this out. Thanks.

EDIT: Using the HassOS 32Bit version solved the problem. I don't know why exactly, but I'm staying with it.

jatlast commented 5 years ago

I am having a similar problem.

After upgrading Home Assistant on a Raspberry Pi 3 B+ from 0.75.3 to 0.83.3 my HTU21D sensor is no longer detected. Any help will be much appreciated. Thank you.

See below for details.

home-assistant.log 2018-12-11 13:56:58 ERROR (SyncWorker_9) [homeassistant.components.sensor.htu21d] Bad reading: 5 2018-12-11 13:56:58 ERROR (MainThread) [homeassistant.components.sensor.htu21d] HTU21D sensor not detected in bus 1

configuration.yaml sensor:

GPIO attached HTU21D Temp/Humidity sensor

Generic Thermostat...

climate:

i2cdetect -y 1 40: 40

ls -l /dev/i2c* crw-rw---- 1 root i2c 89, 1 Dec 11 01:17 /dev/i2c-1

dmesg | grep i2c [ 5.336012] i2c /dev entries driver

./HTU21D_test 22.08C 22.61%rh

beewebmeister commented 5 years ago

Hi,

I solved the issue using an old I2C module driver, i2c_bcm2708, instead of the new one.

You can find module and details here:

https://community.home-assistant.io/t/htu21d-on-raspberry-pi/33132/2

Let me stress the point highlighted by termdude;

"When using the config USB stick (as suggested by the documentation), the content from the file in /modules/rpi-i2c.conf was copied to a file /etc/modules-load.d/* (asterisk). This way the modules weren't loaded".

So, hassos and hassbian teams, please fix both bugs; the wrong driver and the USB stick handling.

Thanks

jatlast commented 5 years ago

Thank you for the reply.

However, I had already followed the directions of your suggested post when I initially set up my htu21d sensor.

/boot/config.txt -JTB - Enable HTU21D temperature sensor (https://community.home-assistant.io/t/htu21d-on-raspberry-pi/33132) dtoverlay=i2c1-bcm2708

ls -la i2c1* -rwxr-xr-x 1 root root 886 Aug 7 01:53 i2c1-bcm2708.dtbo

As for how I am surviving in the meantime, I rolled back to an old version I had backed up last summer. It took a while to bring the interfaces up to date, but at least it works and I have heat again.

Home Automation is still for the tech-savvy, I am afraid, i.e., not ready for hoi polloi.

beewebmeister commented 5 years ago

Ok.

I replaced the driver at the first setup too. However, after upgrading to the latest release, the htu2d stopped working, I know it is strange, but only replacing the already old driver with a copy of it, the htu21d started working again. So I copied the old driver two times, at first setup and after upgrading to the last release.

stale[bot] commented 5 years ago

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.