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#startergenerator

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LeoDJ<p>- Built the (shitposty) <a href="https://chaos.social/tags/USB2Speakon" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>USB2Speakon</span></a> adapter<br>- Designed a new revision of the <a href="https://chaos.social/tags/SSD1303" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SSD1303</span></a> breakout PCB<br>- Developed a small ESP-NOW telemetry and logging framework for a model rocket <a href="https://chaos.social/tags/jfzhn" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>jfzhn</span></a> project<br>- Finished reverse engineering the <a href="https://chaos.social/tags/startergenerator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>startergenerator</span></a>. It spins now! \o/<br>- Built <a href="https://chaos.social/tags/TheLAEMPAN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>TheLAEMPAN</span></a> together with <span class="h-card" translate="no"><a href="https://chaos.social/@techbeard" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>techbeard</span></a></span> and <span class="h-card" translate="no"><a href="https://chaos.social/@Toble_Miner" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>Toble_Miner</span></a></span> (RGB replacement PCBs for IKEA LAMPANs, more info coming sometime™)</p><p><a href="https://chaos.social/tags/GoodOf2024" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>GoodOf2024</span></a> 2/3</p>
LeoDJ<p>The general control loop is also pretty impressive, the engineers at <a href="https://chaos.social/tags/Bosch" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Bosch</span></a> SEG definitely did their job well.</p><p>The lowest limit I can set is 6 RPM and it runs buttery smooth.</p><p>And it has insane amounts of torque. If you hold the pulley really tightly, it slips out of most strong hands at around 20 Nm (as reported via the CAN status messages).</p><p>This will be really fun once put into some small vehicle :D</p><p>(It can also recuperate really well, but can't run in reverse at all)</p><p><a href="https://chaos.social/tags/startergenerator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>startergenerator</span></a></p>
LeoDJ<p>We also did a max RPM test of the <a href="https://chaos.social/tags/startergenerator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>startergenerator</span></a> using one of <span class="h-card" translate="no"><a href="https://chaos.social/@patagona" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>patagona</span></a></span>'s rescued Pylontech batteries, because the 20A of my 1kW lab PSU weren't enough :D</p><p>I set the torque limit to 0.7 Nm (out of 55), no RPM limit and let it rip :D<br>It reached a peak of 43A (~2kW) at the end of the acceleration, settled at 25A (~1.2kW) and reached a peak RPM of 13400.</p><p>It was a bit scary tbh :D<br>(Not sure if the video accurately captured the sound it made)</p><p>(Pylontech thread: <a href="https://chaos.social/@patagona/113149877881417810" rel="nofollow noopener noreferrer" translate="no" target="_blank"><span class="invisible">https://</span><span class="ellipsis">chaos.social/@patagona/1131498</span><span class="invisible">77881417810</span></a> )</p>
LeoDJ<p>Update time:<br>At the end of December I implemented most of the messages the <a href="https://chaos.social/tags/startergenerator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>startergenerator</span></a> wants to see.<br>I knew I got it right enough because the 7 DTC codes it was previously spitting out shrank to just 1. The ones that went away were something like "communication failure power train controller", but the one remaining DTC was a bit disheartening...</p><p>"P143468: Imob_E_LOCKED - The driving authorization has not been released."</p>
LeoDJ<p>- Helped <span class="h-card" translate="no"><a href="https://chaos.social/@crexodon" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>crexodon</span></a></span> a bit with the <a href="https://chaos.social/tags/Unterland" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Unterland</span></a> badge<br>- Quickly hacked together some Art-Net support for <span class="h-card" translate="no"><a href="https://chaosfurs.social/@twizzarak" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>twizzarak</span></a></span>'s tail<br>- "Fixed" the water-damaged motor <a href="https://chaos.social/tags/ECU" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ECU</span></a> of my car<br>- Finally got CAN communication with the <a href="https://chaos.social/tags/startergenerator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>startergenerator</span></a><br>- <span class="h-card" translate="no"><a href="https://chaos.social/@patagona" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>patagona</span></a></span> and I took a look at some cheap <a href="https://chaos.social/tags/BK7231N" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>BK7231N</span></a> based string lights and built a <a href="https://chaos.social/tags/ESPHome" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ESPHome</span></a> firmware<br>- Attended a number of repair cafés and helped repair a handful of devices<br>3/3</p>
LeoDJ<p>- Bought a Mercedes <a href="https://chaos.social/tags/startergenerator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>startergenerator</span></a> and started reverse-engineering it<br>- Implemented gamma correction for <a href="https://chaos.social/tags/PixelBridge" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PixelBridge</span></a><br>- Built a control board and instrument display for the <a href="https://chaos.social/tags/ePocketBike" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ePocketBike</span></a><br>- Dabbled in upholstry and built a new seat for the <a href="https://chaos.social/tags/ePocketBike" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ePocketBike</span></a><br>- Acquired some big <a href="https://chaos.social/tags/SSD1303" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>SSD1303</span></a> OLEDs and desgined a breakout board + Arduino library for it.<br>- Released the <a href="https://chaos.social/tags/PawConnect" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PawConnect</span></a> (Tag-Connect <a href="https://chaos.social/tags/TC2030" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>TC2030</span></a> compatible f̶o̶o̶t̶ pawprint)<br>- Built the now famous <a href="https://chaos.social/tags/PDBrick" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>PDBrick</span></a> together with <span class="h-card" translate="no"><a href="https://chaos.social/@techbeard" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>techbeard</span></a></span><br>2/3</p>
LeoDJ<p>Got out the <a href="https://chaos.social/tags/startergenerator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>startergenerator</span></a> again today. <br>But (destructively) removing the back cover of the <a href="https://chaos.social/tags/BSG" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>BSG</span></a> revealed even less than I had feared...</p><p>Just a big welded(!) copper distribution plate and more plastic and silicon.</p><p>Only a hint of ceramic PCB can be seen through a tiny little hole, that's it.</p><p>Going any further than that really needs some effort and would very likely lead to damage of the power electronics, so I'll probably stick to the <a href="https://chaos.social/tags/CAN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CAN</span></a> fuzzing / information digging approach for now...</p>
LeoDJ<p>Trying to send some <a href="https://chaos.social/tags/CAN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CAN</span></a> messages to the <a href="https://chaos.social/tags/startergenerator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>startergenerator</span></a> didn't prove successful either.<br>I'm not well versed in CAN, but the dongle just kept trying to send the single message on repeat.<br>So I guess it didn't receive a CAN ACK?<br>Afaik, all transceivers in a bus should ACK a frame, no matter if they're addressed or not.</p><p>Not sure why it didn't work. Maybe I was on the wrong baud rate or this device behaves weirdly and only sends ACKs after getting a magic message?</p><p><a href="https://chaos.social/tags/CANhacking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CANhacking</span></a> <a href="https://chaos.social/tags/carhacking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>carhacking</span></a></p>
LeoDJ<p>After much digging I at least found the pinout in some Mercedes shop software.</p><p>But unsurprisingly the <a href="https://chaos.social/tags/startergenerator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>startergenerator</span></a> didn't send any messages on its own on the <a href="https://chaos.social/tags/CAN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CAN</span></a> bus when hooked up to 12V.<br>It did draw 11 mA tho, so at least the pinout seems correct and the controller appears awake.</p>
LeoDJ<p>Bought a <a href="https://chaos.social/tags/Mercedes" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>Mercedes</span></a> <a href="https://chaos.social/tags/48V" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>48V</span></a> <a href="https://chaos.social/tags/MHEV" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>MHEV</span></a> <a href="https://chaos.social/tags/startergenerator" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>startergenerator</span></a> for <a href="https://chaos.social/tags/reverseengineering" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>reverseengineering</span></a>. <br>The specs are impressive, especially for the price point of a few hundred euros.</p><p>- 48V / ~200A<br>- 12.5 kW peak<br>- 165 Nm peak</p><p>The main difficulty lies in finding out the <a href="https://chaos.social/tags/CAN" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CAN</span></a> commands for initialization and control. </p><p>I don't have access to a Mercedes E200 EQ Boost (or similar), so "just sniffing" is out. <br>Maybe somebody could help me with that tho? ^^'</p><p><a href="https://chaos.social/tags/CANhacking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>CANhacking</span></a> <a href="https://chaos.social/tags/carhacking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>carhacking</span></a> <a href="https://chaos.social/tags/BSG" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>BSG</span></a></p>
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