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By xload
#191258
Hello,

I bought the Battery Babysitter, I connected and loaded the example sketch but I don't see anything at serial monitor.

Best regards.
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By lsandino
#191340
Hi,

Looking to the picture attached, I think you have missed one cable connecting the VPU pin on the BabySitter board to a voltage pin on the UNO. From the Battery BabySitter Hookup guide:

"Although the BQ27441-G1A runs at 1.8V, its I2C and GPOUT pins are tolerant up to 5V. That’s where the VPU pin comes into play. The VPU pin, short for VPULL-UP, is the pull-up voltage for the open-drain SDA and SCL pins. This pin is an input, and should be connected to the operating voltage of your system – 3.3V, 5V, etc. A voltage supply is required on this pin, unless you have pull-up’s on the I2C bus elsewhere in your project."

Hope it helps!

Regards.