Help with GPIO Pins

Extra · January 19, 2022, 3:33pm

Hello,

I’m using an Rpi 4 with Manjaro Gnome and python to try a get a button to work.
I went to create a test script for my button, so when I push it it prints a message to the screen but I get module errors.

Here’s what I did. I downloaded python-raspberry-gpio and python-gpiozero from the add/remove software (Manjaro App Store) But when I try:
import RPi.GPIO as GPIO
I get an error saying there is no module RPI.GPIO

Why is that and how can I fix it?

Thanks in advance.

P.S
I also tried everything here with no luck.

This was the code I used (I found it off the internet)

import RPi.GPIO as GPIO # Import Raspberry Pi GPIO library
GPIO.setwarnings(False) # Ignore warning for now
GPIO.setmode(GPIO.BOARD) # Use physical pin numbering
GPIO.setup(10, GPIO.IN, pull_up_down=GPIO.PUD_DOWN) # Set pin 10 to be an input pin and set initial value to be pulled low (off)

while True: # Run forever
    if GPIO.input(10) == GPIO.HIGH:
        print("Button was pushed!")

Dulbi · January 20, 2022, 10:21am

Have you try AUR (en) - python-rpi-gpio ?
I used to use it even the project is not too reactive

Strit · January 20, 2022, 2:57pm

The latest stable release of the RPi.GPIO python module is 0.7.0, which was released almost 2 years ago.

The AUR package that @Dulbi linked above is indeed newer, but it’s an alpha release, so be aware of that.

Dulbi · January 20, 2022, 5:08pm

The one which comes with the AUR package is 0.7.1a4 and almost 1 year old (2021-03-01).
According to the Change Log, you get a

Better RPi board + peri_addr detection (issue 190 / 191)

As I said it was not too reactive and you can wait a long time before HW detection change on the code when new device appears. But, I used to used it and AFAIK it worked.

Extra · January 20, 2022, 5:26pm

So I did:

git clone https://aur.archlinux.org/python-rpi-gpio.git 

cd python-rpi-gpio

makepkg -si

And got:


Error: Failure while downloading https://sourceforge.net/code-snapshots/hg/r/ra/raspberry-gpio-python/code/raspberry-gpio-python-code-08048dd1894a6b09a104557b6eaa6bb68b6baac5.zip
Aborting....

Am I doing something wrong?

Dulbi · January 20, 2022, 5:52pm

Why don’t you use pamac to install it ?

pamac install python-rpi-gpio

You’re right the source was not available (sourceforce cache retention ?). If I use the sourceforge web interface and generate the snapshot and get the same. Now, it seems to be ok:
https://sourceforge.net/code-snapshots/hg/r/ra/raspberry-gpio-python/code/raspberry-gpio-python-code-08048dd1894a6b09a104557b6eaa6bb68b6baac5.zip

Could you please try again ?

Extra · January 20, 2022, 5:56pm

Is there an alternative I can use then?

Dulbi · January 20, 2022, 5:58pm

Could you please try again ?

Extra · January 20, 2022, 6:00pm

Did the makepkg -si again and got Error: One or more files did not pass the validity check!

Dulbi · January 20, 2022, 6:03pm

The sha256sum is wrong it’s

7f0b64e206ba2bd222e08c0558e9fb910be041c11a7970443a90ef8b42e7344a

you cand edit the PKGBUILD with this value or ‘SKIP’

Extra · January 20, 2022, 6:05pm

How would I do that? I’m kinda new at this.

Thanks for the help by the way. It’s much appreciated.

Dulbi · January 20, 2022, 6:07pm

If you git clone the repo, just use a text editor (nano or vi) to edit the PKGUILD file with this new entry.

If you use pamac, the command with prompt if you want to edit it directly.

Extra · January 20, 2022, 6:13pm

Thanks. It worked. I’ll I’ll try importing it in my python script and see how that goes.

Extra · January 20, 2022, 6:27pm

Well good news, there’s no import error. I just have to run my python script as root.

Now I’m trying to figure out if it’s my button that’s not working or my script, because when I push the button, nothing happens.

Dulbi · January 20, 2022, 10:59pm

Good to know.
Did you enable SPI? I guess that the protocol needed for that pin SPI0: MOSI (GPIO10) ?

lsmod | grep spi_

Extra · January 24, 2022, 3:03pm

No. How do I enable SPI0? (Or another pin for that matter. Still can’t get them to work)

Dulbi · January 24, 2022, 4:15pm

What did you get from “lsmod” ?

I guess you can add the following line to /boot/config.txt

dtparam=spi=on

And reboot.

Please, check with lsmod after the reboot.

Edit: spaces removed

Extra · January 24, 2022, 4:35pm

This is what I got from lsmod after adding dtparam = spi = on to the boot config text:

Module                  Size  Used by
rfcomm                 53248  4
snd_seq_dummy          16384  0
snd_hrtimer            16384  1
snd_seq                86016  7 snd_seq_dummy
snd_seq_device         20480  1 snd_seq
cmac                   16384  2
algif_hash             20480  1
algif_skcipher         20480  1
af_alg                 32768  6 algif_hash,algif_skcipher
bnep                   28672  2
hci_uart               49152  1
btbcm                  24576  1 hci_uart
bluetooth             479232  33 hci_uart,btbcm,bnep,rfcomm
ecdh_generic           16384  1 bluetooth
ecc                    32768  1 ecdh_generic
evdev                  24576  7
joydev                 28672  0
zram                   28672  1
zsmalloc               36864  1 zram
brcmfmac              323584  0
brcmutil               24576  1 brcmfmac
sha256_generic         16384  0
sha256_arm64           28672  0
cfg80211              868352  1 brcmfmac
bcm2835_isp            32768  0
bcm2835_codec          49152  0
rfkill                 36864  8 bluetooth,cfg80211
bcm2835_v4l2           45056  0
bcm2835_mmal_vchiq     40960  3 bcm2835_codec,bcm2835_v4l2,bcm2835_isp
v4l2_mem2mem           40960  1 bcm2835_codec
videobuf2_vmalloc      20480  1 bcm2835_v4l2
videobuf2_dma_contig    24576  2 bcm2835_codec,bcm2835_isp
videobuf2_memops       20480  2 videobuf2_vmalloc,videobuf2_dma_contig
videobuf2_v4l2         32768  4 bcm2835_codec,bcm2835_v4l2,v4l2_mem2mem,bcm2835_isp
videobuf2_common       61440  5 bcm2835_codec,videobuf2_v4l2,bcm2835_v4l2,v4l2_mem2mem,bcm2835_isp
videodev              311296  6 bcm2835_codec,videobuf2_v4l2,bcm2835_v4l2,videobuf2_common,v4l2_mem2mem,bcm2835_isp
v3d                    81920  3
mc                     61440  6 videodev,bcm2835_codec,videobuf2_v4l2,videobuf2_common,v4l2_mem2mem,bcm2835_isp
snd_bcm2835            28672  2
rpivid_mem             16384  0
raspberrypi_hwmon      16384  0
gpu_sched              45056  1 v3d
crct10dif_ce           20480  1
vc_sm_cma              36864  2 bcm2835_mmal_vchiq,bcm2835_isp
uio_pdrv_genirq        16384  0
nvmem_rmem             16384  0
uio                    24576  1 uio_pdrv_genirq
sch_fq_codel           20480  7
binfmt_misc            24576  1
crypto_user            16384  0
fuse                  135168  3
ip_tables              32768  0
x_tables               40960  1 ip_tables
ipv6                  536576  140
vc4                   282624  14
snd_soc_core          237568  1 vc4
snd_compress           20480  1 snd_soc_core
snd_pcm_dmaengine      20480  1 snd_soc_core
snd_pcm               139264  4 snd_bcm2835,snd_compress,snd_soc_core,snd_pcm_dmaengine
snd_timer              36864  3 snd_seq,snd_hrtimer,snd_pcm
snd                    98304  13 snd_seq,snd_seq_device,snd_bcm2835,snd_timer,snd_compress,snd_soc_core,snd_pcm
drm_kms_helper        253952  3 vc4
syscopyarea            16384  1 drm_kms_helper
sysfillrect            16384  1 drm_kms_helper
sysimgblt              16384  1 drm_kms_helper
fb_sys_fops            16384  1 drm_kms_helper
drm                   565248  11 gpu_sched,drm_kms_helper,v3d,vc4
drm_panel_orientation_quirks    24576  1 drm
backlight              20480  1 drm
cec                    73728  1 vc4

Dulbi · January 24, 2022, 7:35pm

not good.

Could you please show us the result of the following command

dmesg | grep -i spi

0n0w1c · January 24, 2022, 8:20pm

No spaces. dtparam=spi=on