cc2531dockerhome assistanthome automationmqttphilips huezigbee
This article extends the tutorial about Hass.io and the Xiaomi Aqara Sensors that I've published months ago. That tutorial is part of the series of articles about Zigbee and the Rasbperry Pi using the CC2531 USB dongle. Here are the links:
- Zigbee: Xiaomi Sensors using Raspberry Pi (without Gateway!)
- Zigbee: Flashing a CC2531 dongle using a Raspberry Pi
- Raspberry Pi: Xiaomi Sensors & Home Assistant (Hass.io)
- Zigbee: Reading Xiaomi Sensors with a Raspberry Pi (no Xiaomi gateway needed!)
Fig. 1: Hass.io: Philips HUE Lightstrip.
credentialsdocker enviromentsdocker hubdocker registryembedded systemsencryptiongoraspberry pi
Usually, I login to different Docker registries (local, Docker Hub, etc.) with a computer running Ubuntu. I execute once
docker login, then I enter the username and password, and after restarting the system, the access data is still available. That means, I write the credentials only once. But, on the Raspberry Pi, it was different until today: I needed to write the login credentials every time I booted the board.
This article helps you to install the needed tools to save Docker login credentials on the Raspberry Pi, but not as plain text, so that the next time that you reboot the Raspberry t...
Raspberry Pi | 6 min | 5395
heatsinkice tower coolern-queens problemperformancepythonraspberry pi 4btemperature test
This article is the last in a series of three articles that evaluates the performance of the Raspberry Pi 4B. This time the performance of Raspbian with standard kernel (4.19.y) will be evaluated with and without active cooling using two types of heatsinks. The other articles in the series are the following:
- The first article is about comparing the Raspberry Pi 4B and 3B+ performances:
- The second article compares the Raspberry Pi 4B running standard and Preempt-RT kernels.
performancepreempt-rt kernelraspberry pi 4braspbian busterreal time system
The Preempt-RT patching article is one of the most visited articles in my blog. However, that article needed a small update: Raspberry Pi 4B is out there and with Raspbian Buster, a new version of kernel is available: 4.19.y.
I also uploaded the compiled and patched kernel to lemariva/RT-Tools-RPi. You can follow all these steps and compile the kernel by yourself or you can download the files from the repository and deploy the kernel on your Raspberry Pi 4B.
This tutorial is the second of a series of three that evaluate the performance of the Raspberry Pi 4B. This time the performance of the s...
Raspberry Pi | 3 min | 11415
anniversarybanggooddealse-ink displaypythonraspberry pi
Last week, I published an article about the Raspberry Pi and an e-ink display:
- #Raspberry Pi: an E-Paper display with Widgets (see Fig. 1a).
This time, this tutorial is about processing and displaying images on the 7.5" e-ink screen as shown in Fig. 1b.
Fig. 1a: E-ink Screen connected to a RPi
Fig. 1b: Banggood's 13th anniversary
original image here
Hardware & Software
You find here a list of hardware and software that you could use for this tutorial:
Raspberry Pi | 4 min | 8335
benchmarkbusterjupytern-queens problemperformanceraspberry pi 3 B plusraspberry pi 4braspbian
The new Raspberry Pi 4B has a lot of upgrades and one of the most important ones is the RAM: You can choose between three models (1GB, 2GB and 4GB). But, another main change is the CPU and the RAM bus: they changed from a Cortex-A53 64-bit (3B+/3A+) to a Cortex-A72 64-bit, both ARMv8, and from LPDDR2 SDRAM to LPDDR4 SDRAM. Thus, the CPU clock was increased to 1.5GHz (0.1GHz more) and the memory frequency to 2...
Raspberry Pi | 7 min | 13418
e-ink displaygoogle apisgoogle calendarraspberry piraspberry pi zerowaveshare
E-paper or e-ink displays are becoming more common in recent days. You can find them e.g. on readers, clocks and sensors. Thus, I looked for an e-ink display for the Raspberry Pi and I found the Waveshare® 7.5" E-ink Screen.
There are many projects with an e-ink display and the Raspberry Pi, but I first tried with an ESP32 and MicroPython. That solution didn't work (something was not working with the reset voltage - too much signal noise). So, that remains a work in progress and I will use this board. But now, in this tutorial, I uploaded a solution for the Raspberry Pi.
Fig. 1: Wa...
aqaraaqara sensorsdoor sensorhome assistantmqttpirraspberry pixiaomi gatewayxiaomi sensorszigbee
Last April, I published a tutorial about connecting the Aqara sensors to a Raspberry Pi without using the Xiaomi Gateway. To make that possible, I needed a CC Debugger to flash the TI CC2531 Zigbee Dongle. This debugger was used only one time, and then the Zigbee-USB dongle worked without any problem.
In this article, I will cover a way to flash the CC2531 without the CC Debugger. This reduces project costs (about $10 for debugger + cable adapters) and waiting time. Usually, you wait 30 days to get a low cost version of the debugger (using the cheapest shipping option). Let's start!
Raspberry Pi | 2 min | 5813
board brokencapacitor brokenquality control failedquality problemsraspberry piraspberry pi 4btantalum capacitor
On July 4th, I ordered a Raspberry Pi 4B. To be honest, I really didn't/don't need a new Raspberry Pi, I don't have any specific task for it, but I saw some cool stuff on the Internet, and I said: Ok, I need one! Thus, I bought the 4GB model on Reichelt. The expected delivery date was on July 10th but, I had to wait a little longer and I got it on July 17th! Everything was ok, and I got the following closed and sealed box (see Fig. 1):
Fig. 1: Box of the Raspberry Pi Model 4B (4GB RAM)
But, as soon as I opened the box, my joy faded! :( With a quick visual control, I checked tha...
aqaradockerhass.iohome assistanthome automationproduct reviewraspberry pi 3 B plusxiaomi gatewayxiaomi sensors
I've been very busy the last weeks. I moved to a new apartment and I was living between moving boxes. Four days ago, I managed to put my desk together and now I have some time (not a lot) to write a new article.
Last month I've received from GearBest two Aqara sensors:
These sensors use Zigbee and I connected them to a Raspberry Pi running Raspbian OS and a dockerized version of Home Assistant (DIY tutorial). This connection was made without using any Xiaomi gateway (DIY tutorial).
Hardware and Software...