https://badge.emfcamp.org/w/api.php?action=feedcontributions&feedformat=atom&user=Renze 2026-04-07T01:12:23Z User contributions MediaWiki 1.39.6 https://badge.emfcamp.org/w/index.php?title=TiLDA_MK4/sim800/Reverse_engineering&diff=354 2018-08-30T21:14:42Z

<p>Renze: Add page about reverse engineering efforts</p> <hr /> <div>This page represents an effort to find out more about the inner workings of the SIM800 module found on the TiLDA MK4 badge.<br /> <br /> Feel free to add your own research, but please do not remove content added by other people, even if you determined the information to be false.<br /> Instead you could add text explaining why the existing content was wrong.<br /> <br /> == Usefull links ==<br /> Page with firmware, update tool and instructions: https://www.raviyp.com/embedded/214-learn-how-to-update-the-firmware-of-your-sim800-modules<br /> Information about Mediatek chipsets: https://www.bunniestudios.com/blog/?p=4297<br /> Information on Mediatek file formats: https://wiki.postmarketos.org/wiki/Mediatek#Image_format<br /> <br /> == Current state of research ==<br /> Based on the flashing utility and firmware file provided on the raviyp website the SIM800 module probably contains a Mediatek dumb-phone chipset. Bunny did some research on those already, which can be found on his [[https://www.bunniestudios.com/blog/?p=4297|blog]].<br /> <br /> == To-do list ==<br /> - Removing the lid from a SIM800 module and taking photos of the insides<br /> - Figuring out exactly which (Mediatek) chip is inside the SIM800<br /> - Find a way to replace the built-in ringtones<br /> - ???<br /> - Profit!</div>

Renze