I needed to backup original firmware of my favorite Chinese wireless router but I didn’t want to spend much time with hacking the embedded Linux. So I have ordered this cheap USB serial EEPROM programmer on ebay. You can easily find the original utility & driver for Windows on the Internet but the chip manufacturer doesn’t provide software for Linux. Continue reading CH341A USB serial EEPROM reader under Linux →

I decided to do some experiments with STM32. Continue reading Blinking LED on STM32F103 with only Linux tools →

I’ve bought cheap USB handset from eBay to use with my VoIP provider. In Widows it worked good with supplied app which supported few VoIP programs and Skype. Since I use Linux on my desktop, I tried to plug it in. In USB listing it showed up as soundcard and HID device. Continue reading Cheap USB Skype/VoIP phone protocol discovery →

Nothing special, just attiny2313, usbasp and some basic functions

Continue reading My first AVR →

While I was searching for cheapest oscam compatible card reader on e-bay, I found this SIM card reader:

e-bay link

With a price under $3 it is able to read/write SIM cards so I bought one to test if I can use it also for standard decrypt cards reading. Continue reading OSCam: Cheapest smart card reader →

Yesterday, I was thinking about a simple way how to issue commands, list files, get files and access database on a remote system. With PHP all these things are simple to do and you don’t need to write TCP server, because it is provided by some HTTP daemon. It is also important that this could do only authenticated user. Next point was, that authenticated user can do anything on remote system and no complicated method implementation is needed on remote system. This might seem less secure but think about ssh… is it not similar? Continue reading PHP: RPC with asymmetric cryptography →

Short time ago, I was searching for a way how to get HDMI output from camera to PC (and then stream on the Internet). There are PCI-x HDMI input cards on the market, but they cost 100$+. Suddenly, I have found a device, which transmitted HDMI signals over IP network for half of the above price so I took the chance. Specification said something about MJPEG so I thought it might be possible. Continue reading Reverse engineering Lenkeng HDMI over IP extender →