A video on using Bus Pirate v4 to talk to a TI bq27510 Fuel Gauge by pitface123:
The Fuel Gauge is mounted on the Fuel Tank Booster Pack.
A Papilio Pro that is programmed as Logic Sniffer is used as the Logic Analyzer and protocol analyzer.
Nifty prototyping platform.
JaWi’s OpenLogic Sniffer as Logic Analyzer client..
Via Twitter. Thanks @JanLCumps!
You can get a Bus Pirate v4 for $40, including worldwide shipping.