Tag Archives: firmware

IKEA Samtid mood-light BT firmware — simple_serial

Posted on July 9, 2015 by robert

This firmware for the ISML + HC-05 Bluetooth module currently implements the same simple interface as the current WiFi-code named ‘browser_control’.

Pairing the ‘HC-05’on linux using the command line (openSUSE 13.2): When first powered on, the HC-05 module will … Continue reading →

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YOUYUE 858D+ hotair station — reverse engineering #5

Posted on January 5, 2014 by robert

The lack of an ISP connector on this board has given me a lot of grief. This little adapter board will solve that problem once and for all. It also provides a couple of through-hole pads for potentially adding some … Continue reading →

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YOUYUE 858D+ hotair station — reverse engineering #4

Posted on December 2, 2013 by robert

Possibly (and hopefully) the last post in this little hot-air station series. I’ve opened and closed that device far too often – and popped out the chip multiple times in each instance. You see the designer failed to add a … Continue reading →

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YOUYUE 858D+ hotair station — reverse engineering #3

Posted on November 29, 2013 by robert

After tweaking some control loop parameters and adding a hard-limit for the temperature (heater cut-off + resetting the error term, effectively restarting the loop), the massive temperature overshoots are a thing of the past. I declare this a success. “Some … Continue reading →

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YOUYUE 858D+ hotair station — reverse engineering #2

Posted on November 28, 2013 by robert

In part one I dealt with the very basics: fan control, buttons and the display. Now it is time to attack the business end of this device! Safety warning / disclaimer: Please understand that operating a device powered by line-voltage, … Continue reading →

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YOUYUE 858D+ hotair station — reverse engineering #1

Posted on November 25, 2013 by robert

The YOUYUE 858D+ I have in my possession uses an AVR ATmega8 microcontroller to control the fan-speed, drive a 7-segment display, read 2 buttons and drive the TRIAC via an opto-isolator.

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Akafugu LED candle — custom PWM firmware

Posted on May 9, 2013 by robert

Random candle-imitating flicker is a good start, but if we can use PWM as well… MAKE IT SO!

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WaveAce 224 — Mini rant #9: ZOOM Zoom zoom… or NOT…

Posted on June 22, 2012 by robert

Will it ever end? How many bugs are there still to be discovered… A word of warning: there will be some strong language in the post. If anybody affiliated with Lecroy should read this, please feel offended – not as … Continue reading →

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Pentax Optio S5z – leap year bug

Posted on February 29, 2012 by robert
www.youtube.com/watch?v=9IXc9aOfsRY”

Now I’d need a 2nd camera to show what’s going on. Let’s see if I can find an old web-cam… Done. How do I record from it using linux? Hmmm.

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