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<font size="4" face="Comic Sans MS">I forgot this link, which
explains more.<br>
<a
href="https://hackaday.io/project/188194-dji-fpv-battery-breakout-mod-2-communication">https://hackaday.io/project/188194-dji-fpv-battery-breakout-mod-2-communication<br>
</a></font><br>
<div class="moz-cite-prefix">On 5/23/2025 4:51 PM, Alex Fraser via
Tacos wrote:<br>
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cite="mid:453bb84e-a5d2-47d2-b09a-9b298778b0ea@comcast.net">
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<font size="4" face="Comic Sans MS">I mostly like the DJI
batteries in my Phantom 3s. They snap into the drone body and
you can turn the power on and off with a button sequence. They
can be set to auto discharge which is a great safety feature.
The batteries communicate with the drones main controller board
and hence the battery charge is shown on your tablet on the
ground which you view the camera feed on. It all works well
enough. So what's the problem?<br>
<br>
DJI is highly proprietary. The protocol the battery circuit
board uses to communicate with the main board don't follow any
standards, well it follows DJI standards. This makes it so if
you want to replace the main controller with a third party </font><font
size="4" face="Comic Sans MS">board the battery can't talk to
the new board, also you can't use third party batteries on stock
DJI machines. I was hoping someone would have created some
code for an Arduino where it would sit between known protocols
and DJI protocols and would make it all just work, but that
apparently isn't in the cards. It is surprisingly complex. <br>
<a
href="https://github.com/samuelsadok/dji_protocol?tab=readme-ov-file"
class="moz-txt-link-freetext" moz-do-not-send="true">https://github.com/samuelsadok/dji_protocol?tab=readme-ov-file</a><br>
<br>
Well it is beyond what I can figure out in any reasonable amount
of time (12 monkeys with type writers...). If I put another
board in one of my Phantoms I will use standard batteries and
add on boards to read power, all readily available. This
technology stuff sure changes faster and faster. <br>
<br>
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