GrovePi hang on digitalRead in Pi4

Hi,
I can’t run the grove_button.py example. It hang on the digitalRead(). I have a Pi4 Model B 1G. I updated the firmware. Version is 1.4.0 . Here is my log file:

Check space left

Filesystem Size Used Avail Use% Mounted on
/dev/root 15G 3.6G 11G 26% /
devtmpfs 299M 0 299M 0% /dev
tmpfs 428M 0 428M 0% /dev/shm
tmpfs 428M 5.9M 422M 2% /run
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
tmpfs 428M 0 428M 0% /sys/fs/cgroup
/dev/mmcblk0p1 253M 48M 205M 19% /boot
tmpfs 86M 4.0K 86M 1% /run/user/1000

Check for dependencies

python 2.7.16-1 install ok installed
python-pip 18.1-5+rpt1 install ok installed
git 1:2.20.1-2+deb10u3 install ok installed
libi2c-dev 4.1-1 install ok installed
python-serial 3.4-4 install ok installed
python-rpi.gpio 0.7.0-0.1~bpo10+4 install ok installed
i2c-tools 4.1-1 install ok installed
python-smbus 4.1-1 install ok installed
scratch 1.4.0.6~dfsg1-6 install ok installed

I2C still in blacklist
SPI still in blacklist

Check for addition in /modules

I2C-dev already there
i2c-bcm2708 already there
spi-dev already there

Hardware revision

RPI4 Pi 4 Model B 1G

Check the /dev folder

i2c-1
ttyAMA0

USB device status

Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 5000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M
|__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M
Raspbian for Robots Version

cat: /home/pi/di_update/Raspbian_For_Robots/Version: No such file or directory

Hostname

raspberrypi

Checking I2C bus for devices

Checking I2C bus 0

NOTE: it is normal for this one to fail
Error: Could not open file /dev/i2c-0' or /dev/i2c/0’: No such file or directory

Checking I2C bus 1

 0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f

00: – 04 – -- – -- – -- – -- – -- –
10: – -- – -- – -- – -- – -- – -- – -- – --
20: – -- – -- – -- – -- – -- – -- – -- – --
30: – -- – -- – -- – -- – -- – -- – -- – --
40: – -- – -- – -- – -- – -- – -- – -- – --
50: – -- – -- – -- – -- – -- – -- – -- – --
60: – -- – -- – -- – -- – -- – -- – -- – --
70: – -- – -- – -- – --

Checking for firmware version

Thanks for you help!

1 Like

same Problem with all Sensors, doeasn’t mather if it is a digital or analgoRead or a digitalWrite on a Relay… strange behaviour

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Just to let you know that I fixed the problem by slowing the clock in the /boot/config.txt from 700 to 600. Other posts suggested that the Pi 4 is too fast for actual GrovePi library… I didn’t want to add delays before each port reading so I prefer to lose a little bit of clock speed. Tell me if it fixes your problems too…

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I haven’t tried it yet, but what kind of errors are you getting while it hangs on?

Will try your suggestion and give you a feedback.

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The Pi-4 has caused other issues on other platforms as well - see my posting about flashing GoPiGo-3 firmware using a Pi-4.

Viz.:

It’s just too fast and too advanced for the older software.

Also note that the Pi-4 must be used with Raspbian Buster or later - or a Raspbian for Robots version based on Buster or later.

Other sites have reported issues with the new 8 gig Pi-4’s that were not present with earlier Pi-4 models.

The Pi-4 is a cool beanie, can be useful, and I have one installed in my GoPiGo-3; but the Grove-Pi software was written at a time when the Pi-3 was still experimental, (and not available), so the Pi-4 is perhaps a bit much.

Note that I do not have a Grove-Pi and my examples are drawn from other issues reported on other platforms or other sites.

My, (unqualified), suggestion is to limit the Grove-Pi to earlier versions of the Raspberry Pi unless and until you are more expert at this.

On a more personal level, I want to thank everyone here for providing both exposure and support for the Grove-Pi. Many of us here have absolutely no experience with the Grove-Pi so I want to personally invite you to stay and lurk - I am learning much from your postings.

I also hesitate to impose on you all, but the presence of people using the Grove-Pi here on these fora is invaluable and I hope you can stay, lurk, post what you accomplish, and help others with Grove-Pi issues.

Thanks again and welcome in!

1 Like