Author: John
Petit Studio Raspberry Pi HDMI extender cheap cable fix
Note: This fix is NOT due to a fault of the Petit Studio Raspberry Pi Camera extension kit, it’s due to the use of cheap HDMI leads. I brought some Petit Studio Raspberry Pi HDMI camera extenders from…
Read More »EP Solar MPPT Tracer charge controller serial code
Following on from my previous post working out the EP Solar Tracer serial protocol, I’ve got code working on a Raspberry Pi. It’s even validating the CRC checksum.
Read More »EP Solar MPPT Tracer charge controller serial interface
I’m currently involved in a project to set up a solar powered wireless station and wanted to remotely monitor the battery charge process. I looked into a number of charge controllers to see if any of them could…
Read More »dump1090 binary built for Raspberry Pi / Arm
If you’re after a binary of dump1090 for the Raspberry Pi without having to build it, here’s a compiled binary for you. I built it on Arch linux, but it also works on Raspbian, or likely any other…
Read More »Pulsecounter PCB’s have arrived
I posted recently about detecting power loss in an AVR and quickly writing values to EEPROM before power is lost completely and have since received the PCB’s I ordered from oshpark. This is the first time I have…
Read More »This website is now exclusively SSL
Google have announced (Ironically via a non SSL website) that they will now take into account whether sites use secure, encrypted connections as a component of their ranking algorithm. On this announcement I’ve switched my website to exclusively…
Read More »AVR – Detecting loss of power and writing to EEPROM
As part of a recent AVR project, I wanted a way to increment a counter and store it even if the power was lost. This could be done with an external flash memory device, but I wanted to…
Read More »Huawei HG630B. Inspecting the firmware
My previous posts on hacking the HG630B didn’t result in me getting root/console access to the router, so it’s time to look into the firmware. I downloaded the latest version of the firmware. These are the details of…
Read More »Huawei HG630B. Connecting to the UART
In my previous post I guessed that a five pad header on the rear of the PCB could be a UART of some type. I quickly soldered a header to the pads, connected my Saleae logic analyzer up,…
Read More »Huawei HG630B. Peeking inside
Let me be the first to say, it is really hard to open up the HG630B without breaking anything. You have to get the foot off first, this can be done with a small flathead screwdriver and a…
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