Questions tagged [compute-module-3]
For questions pertaining to the Raspberry Pi computer module 3.
59 questions
0 votes
0 answers
35 views
CM4S DPI display not working
A DPI display is working with CM3+. However, when changing the CM3+ to CM4S, only the backlight is working. Attempts to resolve the issue: A GitHub issue has been created and several steps have been ...
- 121
0 votes
1 answer
253 views
USB not working for CM4S
I used to work with CM3+ and I recently got some CM4S. I have an issue with it and I don't know what to think about it. Previous setup: I have a Compute Module IO Board Plus designed by WaveShare. ...
- 90
1 vote
1 answer
571 views
Raspberry Pi Compute Module 3+ and IO Board does not detect any USB devices on Yocto Poky
I have a Raspberry Pi Compute Module 3+ mounted on an IO board running Yocto Poky with linux 5.10.17-v7. I've installed different usb modules and libraries trying to make CM3 detect connected USB ...
- 111
-1 votes
1 answer
739 views
Access Multiple I2C Ports on Raspberry Pi CM4
I am working on the Raspberry Pi Compute Module 4. I would like to implement the 2 I2C ports for the 2 different types of sensors. (must be accessed within a single application) I am using the I2C ...
- 65
0 votes
1 answer
656 views
Can we read the emmc flash of the compute module 3+
As we can read the data from the sd card.but in compute module 3 plus there is choice between sd card and emmc. if we flash the raspbian os on the emmc and make changes on it then do we read that ...
- 11
0 votes
0 answers
52 views
CM3+ and RaspiCam V2 issues
I'm trying to use two RaspiCam V2 with CM3+ and Computer Module 3+ Development Kit board. I followed instructions provided in official links: Raspberry Pi OS with desktop and recommended software ...
- 122
0 votes
0 answers
327 views
How to clone a Pi that has flash instead of an SD card
I'm working with the Pi CM3+, which has 32GB of flash memory (at least my specific one does). While of course it needed an image on an SD card to initially boot, since then it has been operating ...
- 113
1 vote
1 answer
63 views
How to monitor wifi network connection from raspi to linux PC [closed]
I have several raspberry pi CM 3B+ in a custom device. I use USB dongle as wifi adapter. After some time passed, the connection became unstable and it often cannot even reconnect and need to be ...
- 131
0 votes
1 answer
518 views
Raspberry pi compute module 4 io board and compute module power on with PoE
I have rpi cmb4 and I want to power on rpi with using PoE. I don't know how should I do. I tried to just connect ethernet cable to rpi but rpi was still closed. Is there any idea?
- 49
1 vote
1 answer
453 views
What is the impact of setting gpu_mem=16 using the vc4 kms driver? (compute module 3+)
If i understood correctly, the kms driver (vc4-kms-v3d) uses a dynamic memory split which can be set via the 'cma' parameter in cmdline.txt This means the less memory i assign to the gpu with 'gpu_mem'...
- 69
1 vote
1 answer
717 views
Imager fails to write to CM3 eMMC
I am trying to flash an image onto a Compute Module 3+ with onboard eMMC using the CM I/O board. The process seems straightforward, but I'm running into an error. Here are the steps I'm taking: ...
- 121
0 votes
0 answers
261 views
No sound with Jitsi Meet and ALSA
For a project I'm using a Raspberry Pi with ALSA. ALSA is configured and speaker-test provides me audio output. However, when I open Jitsi Meet in Chromium, there is no sound. When I open YouTube in ...
- 101
1 vote
1 answer
722 views
Opening multiple serial port slows down USB speed
note that this is a duplicate of my question on stackoverflow I am currently working on a software that use Python3 (pyserial) to interface with a lot of serial port (~24) on a Raspberry Pi Compute ...
- 13
0 votes
1 answer
188 views
Compute module CM3+ change GPIO 37 alt function
I am trying to switch the alt functions on GPIO36 and GPIO37 on CM3+. I installed and ran the pigpiod service. I find that for GPIOs greaters than 27 that pigs command returns "no permission to ...
0 votes
0 answers
546 views
Default i2c not working in compute module
I am trying to communicate with the two i2c devices using the gpio pins 0 and 1 for the first device and 1 and 2 for the second device. I can communicate to the i2c device using the gpio pins 0 and 1 ...
- 303