Hello,As you’ve probably seen (if you read my blog), my previous bus master was ugly, small and uncomfortable to use.It was the high time to make something new… 🙂 Connecting 1-wire buses should be as easy as connecting a LAN cable to the switch. As …
Read MoreUsing Rigol DS1074Z oscilloscope under Linux and PulseView
Hi,I recently bought a new Rigol DS1074Z which is a great oscilloscope for hobbyist. The feature to price factor was really great and it also has a quite nice reviews, so I decided to give it a try 🙂 Quick hardware overview It is a …
Read Morebinding/unbinding usb drivers a.k.a. who stole my hidraw1 device file
Hi! Recently I was playing with using my HID device differently then usual: I used the libusb library. Instead opening a raw file /dev/hidraw1, I used libusb_open_device_with_vid_pid(). Everything was working properly, then it was a time to go back using the hidraw file… but wait: …
Read MoreRaspberry Pi’s serial console
Hi! As I sometimes have odd behavior with my Raspberry Pi (the USB/LAN is stopping working, while the whole raspberry does still work), I had to find out the method to debug this specific problem. Connecting HDMI display and a keyboard in place where I …
Read Morebcm2835_i2c is the new i2c module on RPi kernels
Hello. Yesterday I’ve updated the kernel on my RPi from 4.4.11+ to 4.14.31+. Unfortunately the i2c stopped working despite the module bcm2708_i2c loaded. Trying to add the ds2482 with command: echo ds2482 0x18 > /sys/bus/i2c/devices/i2c-1/new_device gives ‘no such file or directory’ error. I reported this …
Read MoreHow to hack my own IP camera :)
Camera overview I have a cheap IP camera from Polish reseller (ivel.com.pl). It is in fact a IP cam based on HiSilicon SOC. Manufacturer code is:Â LV-IP22IR40DVBL and it is available here. In fact for this price the camera is quite nice. It has a solid …
Read MoreRPi: creating a RAM-disk running Linux environment from NFS booted Raspbian
Sometimes you need a very specific use case for your Raspberry Pi. The durability (and speed) of the SD card used in RPi may vary. Because of this I always tend to move Raspbian to an NFS share, and boot via NFS (root over NFS). …
Read MoreMonitoring Voltronic Power Axpert MEX inverter under Linux
I am using the SKYMAX Expert MEX 3K-24 inverter. In fact it is identical with Voltronic Power Axpert MEX 3K-24, it was just rebranded by a Polish company. It is a 24 volts model, so I am using a two 12V 100Ah batteries connected in …
Read MoreDS2438-based 1-Wire humidity sensor
In this post I want to share with you how I did the humidity measurement in my bathroom. Because I already have 1-Wire buses all over my house measuring temperatures (DS18B20), sensing my switches (DS2413) and controlling relays (DS2408), so logical step was to measure …
Read MoreControlling relay board with DS2408 over 1-Wire
I wanted to make my home automation to be cheap. Commercial solutions, like KNX was a way too expensive for me; besides creating own system gives great benefits like better knowledge about how it works, possibility to customize it to my needs (including software) and of …
Read More