Comments on: What is the Raspberry Pi Compute Module 4 (CM4)?

By: An Unofficial Raspberry Pi Compute Module 5 – TOP HACKER™

An Unofficial Raspberry Pi Compute Module 5 – TOP HACKER™ — Wed, 08 Nov 2023 12:30:07 +0000

[…] What is the Raspberry Pi Compute Module 4 (CM4)? […]

By: Paragon Project: Unofficial Compute Module 5 | PiCockpit | Monitor and Control your Raspberry Pi: free for up to 5 Pis!

Wed, 08 Nov 2023 10:23:26 +0000

[…] What is the Raspberry Pi Compute Module 4 (CM4)? […]

By: What You Can Do with a Compute Module 4 | PiCockpit | Monitor and Control your Raspberry Pi: free for up to 5 Pis!

Fri, 15 Sep 2023 16:50:58 +0000

[…] last year, we published an article about the basics of the Compute Module 4 here. But so much has happened in the past year and a half, so we wanted to talk about the Compute […]

By: Adam

Adam — Tue, 11 Jul 2023 12:31:34 +0000

In reply to SAM Du.

您能解释一下问题吗？

By: SAM Du

SAM Du — Tue, 11 Jul 2023 03:41:41 +0000

你好，请问一下如果CM4出现无法适配树莓派4B的镜像的问题，应该如何去解决

By: Xuyun Zeng

Xuyun Zeng — Tue, 29 Nov 2022 11:07:02 +0000

In reply to jjay.

If you are talking about the IO board, no, it doesn’t come with jumpers. I don’t think USB-C works with the IO board either because there’s no USB-C port. I used the barrel connector. Cost me $10 or so to buy one.

By: jjay

jjay — Tue, 29 Nov 2022 04:06:22 +0000

Hi, dies the board come with jumpers to set the eMMC? Also, can it be powered by USB-C or do I need to purchase a barrel connecter charger?

By: Nick Berry

Nick Berry — Mon, 24 Oct 2022 21:29:44 +0000

According to RPiLocator.com, the CM4 (unlike the RPi model 4) is available. I have an Argon40 NAS enclosure that needs a RPi 4 to function; I have not been able to locate one after several months of attempts. So a RPi – CM4 board that emulates the RPi form factor but uses a CM4 to replace whatever RPi components are responsible for its scarcity might (in some cases, at least) solve the problem.

In your opinion, is this a practical approach to the RPi availability problem? Does such a board (to your knowledge) actually exist? Your site mentions a carrier board “Sourcekit PiTray Mini” which looks promising.

Thanks
Nick

By: raspi berry

raspi berry — Tue, 16 Aug 2022 08:43:24 +0000

In reply to Farah Bouali.

Dear Farah, as an engineering student you will need to study datasheets and talk to suppliers / manufacturers of your devices. It is part of your job as a student.
We can offer you paid consulting service to solve these problems, if you are interested.

By: Farah Bouali

Farah Bouali — Fri, 12 Aug 2022 09:59:41 +0000

Hi
I hope you are doing fine!
My name is Farah Bouali and I have completed my second computer engineering year.
Actually, I have been engaged in a project using a raspberry pi compute module 4 integrated in a waveshare board and I found some problems so I am writing you this mail hoping to get your kind supervision and guidance.

First, I couldn’t find a way to use the ADC Differential Inputs that already exist in my cm4. I want to get the values from an AKS 11 sensor (Temperature sensor) or any other sensor. In this case, how could I visualize the result? What should I put in my script? I am not even able to control GPIO inputs and outputs.

Second, while trying to read data from a mobile application. Though I was able to connect two devices (a Serial Bluetooth Terminal on my mobile and the Rpi) through “bluetoothctl” command and even able to visualize the data received through this command “minicom -b 9600 -o -D /dev/rfcomm0” but no script helped me reading this received data and use it to make specific orders (like turning on/off sensors)

All I want to do is get some information from any sensor and send it to a mobile app through ble protocol and if it’s possible to control this sensor functioning.

I would be very grateful if you could help me. I will be available on the phone(whatsapp) and mail for any question.

I have attached some links that I’ve worked with and I would be glad to hearing from you soon.

I am very thankful and looking forward to your response.

Waveshare configuration link: https://www.waveshare.com/wiki/Compute_Module_4_PoE_4G_Board#Isolation_GPIO.2FI2C
Project I want to start with: https://www.technologyrecipes.com/using-blueterm-app-to-communicate-over-ble-between-an-android-device-and-raspberry-pi/

Best regards,
—
Farah Bouali
2nd year computer engineering student at ENIS (National School of Engineers of Sfax)

(email address and phone number removed to protect Farah, the editor)