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The Tesla Battery Current Shunt, not alot of attention has been given to this component out of the pack. Which is a shame as a good current shunt is a useful tool.

Using a multimeter and scope I worked out what signals were shared between a master board and the shunt. Turns out they use SPI, quite strange considering the slaves work on serial (however using a bastardized spi protocol).

All info on the github link:

https://github.com/tomdebree/Tesla-Current-Shunt

Current software:
-initialises the shunt
-reads out the 'current' value conversion factor yet to be determined.

Guess I will now make a simple converter board.

Note: USE AT OWN RISK ground of shunt is HV GROUND
 
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