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…
WeiterlesenHow to enable bluetooth headphones on Windows 8.1
To follow this guide, your device should already be paired. (Windows + C > Settings > Change Computer Settings) Open system control panel, and choose the Sound control panel Your headphones should show up in the control panel. Mine are the Soundcore Life Q30 Stereo. (Note you can choose between headset and headphones here.) be…
WeiterlesenEnabling and checking I2C on the Raspberry Pi using the command line for your own scripts
Most people know that you can enable the I2C port using raspi-config. raspi-config also offers a non-interactive mode, where you can drive it’s functionality using command line parameters to it. Reading the current state of the I2C port on the Raspberry Pi Here is how to read the current state of the I2C port: sudo…
WeiterlesenRaspberry Pi single board computer market share of total PC market in 2020
For a report I’m preparing for a bank, today I’ve calculated the market share of the Raspberry Pi single board computers (all models) in the worldwide PC market in 2020. Here it is: 2,69 % (at 7.4 Million shipped Raspberry Pi units in 2020) Here is how I came up with this figure: Calculated the…
WeiterlesenTurn off the Adafruit Capacitive Touch PiTFT Plus Display (#2423) on power-off
Using a device tree overlay it is easy to turn off the Adafruit display backlight once the Pi goes into power-off state. Simply add the following line to the end of /boot/config.txt dtoverlay=gpio-poweroff,gpiopin=18,active_low=“y“ This will drive this particular pin #18 (which is responsible for the backlight on the Adafruit PiTFT display) low on shutdown, and…
WeiterlesenRaspberry 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…
WeiterlesenLite 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…
WeiterlesenControlling 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…
WeiterlesenWill the Raspberry Pi 400 be available in an 8GB version?
The Pi400 already has a lot of basic models due to the languages, which of course is a bigger logistic challenge for Raspberry Pi and its partners.The standard version of the Pi 400 with 4 GB covers most (consumer / school children / students) application purposes. 8 GB are rather needed in the area of…
WeiterlesenThe 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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