Using GUI to communicate with MPF42791

Battery Management
1

Hello

I’m looking into validating Fuel Gauge MPF42791 for my BMS application.

Based on reference design’s User Guide, accessible from here:

the document on §5.2 mentions about a possibility to convert GUI’s UART messages into I2C messages for the Fuel Gauge but fails to be more clear on how to do that - like what messages the GUI sends out and expects back when trying to connect to MPF42791 via GUI ?

I was able to record a serial API message upon connect (only to FG) but I am failing to understand the content of the length, data frame and resulting CRC bytes - since they don’t add up and have no correlation to the FG’s registries.

I was wondering if you could support connecting to a single MPF42791 fuel gauge chip with my own MCU without the needed the full reference design (costing around 1k€).

2

Hi,
Yes, you can connect the fuelgauge to your own MCU, and communicate. It can work with other Analog Front Ends (AFEs) protection devices as well.

Full reference solution/design is to get familiar with the full range of capabilities of our fuel gauge.

Best,
Nouman