Updating Variant Images in Shopify using CSV

Shopify has a possibility to update fields using a CSV file. This is useful if you want to update a lot of images. Shopify will download these images from a remote server if necessary, so you can provide URLs of your choice. You only need to provide the values you want to update, along with…

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raspi-config nonint do_i2c 1 hangs “forever”

While developing PiCockpit, and trying to allow the user to turn I2C off from the webinterface, I have run into crashes and problems. I am using raspi-config in non-interactive mode (I’ve written about this before) to control I2C from the PiCockpit client. While debugging the issue, I noted that – if something was busy accessing…

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Raspberry Pi Compute Module 4 vs Compute Module 3

Raspberry Pi launched Compute Module 4, as a successor to Compute Module 3B+. The Compute Module 4 (CM4) is a so-called System on Module (SoM), which contains core parts which make up a Raspberry Pi 4, for example, and in addition to that eMMC Flash in different sizes (ranging from none for the Lite module…

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Lite version of PCCB

The PCCB is a carrier board for the Raspberry Pi Compute Module 1 – 3 B+. We are able to remove any parts of the full PCCB you do not need, thereby cutting your BOM cost & time to market significantly: For this particular customers only the following features remained: 10 / 100 Mbit/s LAN…

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Controlling LEDs on Alpine Linux using the command line

We have developed an embedded Raspberry Pi Compute Module carrier board for industrial use: the PCCB. As you can see, there are three (directly) user programmable LEDs on the PCCB: USER / INFO / ACT. These are defined in the device tree. For example, we can define the following in our device tree overlay: //LEDs…

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The technology & security foundations of PiCockpit

I was asked to elaborate a bit about the security & technology foundations of PiCockpit. The parts which are involved PiCockpit consists of several parts: picockpit-client picockpit-frontend picockpit-backend picockpit-api (“papi”) the database the MQTT server the picockpit Package repository The MQTT server Data between the picockpit-frontend and picockpit-client is exchanged using the MQTT server (called…

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