Installation issue

[alex-v-fraser]

Hello!
I’ve just bought and installed Raspbee II in my Raspberri Pi 4 8Gb, Raspbian OS desktop version.
I tried to install RTC as written in readme file
But when I started ‘make’ command (step 4) I got error:

make[1]: *** /lib/modules/5.10.6-v7l+/build: No such file or directory. Stop

I’ve manually created this directory and then run ‘make’ command again but got another error:

make[1]: *** No rule to make target 'modules'. Stop.
make[1]: Leaving directory '/usr/lib/modules/5.10.6-v7l+/build'
make: *** [Makefile:17: build] Error 2

I have read here - but it doesn't solve my problem
What should I do?
Please help!

[ChrisHae]

Have you already solved your problem? Else I would recommend do

sudo apt update
sudo apt upgrade
reboot

first.

[alex-v-fraser]

Have you already solved your problem? Else I would recommend do

sudo apt update
sudo apt upgrade
reboot

first.

Thank you for fast reply. I just did it. Then run 'make' again and got following message:

checking deb package dependencies...
i2c-tools
build-essential
raspberrypi-kernel-headers
build rtc module...
make -C /lib/modules/5.10.6-v7l+/build M=/home/pi/raspbee2-rtc-master modules
make[1]: Entering directory '/usr/lib/modules/5.10.6-v7l+/build'
make[1]: *** No rule to make target 'modules'. Stop.
make[1]: Leaving directory '/usr/lib/modules/5.10.6-v7l+/build'
make: *** [Makefile:17: build] Error 2

[ChrisHae]

What is the output of uname -r ?

[alex-v-fraser]

5.10.6-v7l+

[ChrisHae]

You have to install the raspberry pi kernel headers to get the build directory and to build kernel modules. Creating a build directory yourself has no effect. For new Kernel releases it can take a few weeks until the repository is updated: https://www.raspberrypi.org/documentation/linux/kernel/headers.md
The documentation suggests to clone the kernel as described in their Build Section. Alternatively you can downgrade to the latest stable kernel (5.4.83).

[mrclschstr]

This might ease up some steps: https://github.com/RPi-Distro/rpi-source

[alex-v-fraser]

Thank you so much!
I've reinstalled 5.4.83-v7l+
RTC works, but it gives an error:

USER@raspberrypi:~ $ sudo hwclock --verbose
[sudo] password for USER:
hwclock from util-linux 2.33.1
System Time: 1611395292.300711
Trying to open: /dev/rtc0
Using the rtc interface to the clock.
Last drift adjustment done at 1611392630 seconds after 1969
Last calibration done at 1611392630 seconds after 1969
Hardware clock is on UTC time
Assuming hardware clock is kept in UTC time.
Waiting for clock tick...
ioctl(4, RTC_UIE_ON, 0): Invalid argument
Waiting in loop for time from /dev/rtc0 to change
...got clock tick
Time read from Hardware Clock: 2021/01/23 09:48:14
Hw clock time : 2021/01/23 09:48:14 = 1611395294 seconds since 1969
Time since last adjustment is 2664 seconds
Calculated Hardware Clock drift is 0.000000 seconds
2021-01-23 12:48:13.286949+03:00

Is it critical?

[mrclschstr]

I have the same error and others too (see #10). I don't think it's critical but I cannot say for sure; at least everything is working ;-)