Battery backup

VIBE2 provides an optional battery circuit for standby purposes.

Instructions

A 2-pin Connector interface is provided at battery test points TP6 and TP8, with a 10K thermistor R31 mounted on PCB to simulate the thermistor circuit for battery charging.

Following is a diagram explaining the battery interfaces on VIBE2 :

Follow the given steps to change the battery charging conditions :

• Connect a 3.7V Li-Po battery of sufficient capacity with its VBAT to TP6 and GND to TP8.

• Issue the following commands in console :

a) Change battery charging range to 0-60 degree C

# i2cset -f -y 0 0X24 6 0Xb3 b

b) Change battery charging voltage to 4.2V

# i2cset -f -y 0 0X24 5 0Xa0 b

NOTE: When board is powered up only by battery then Power switch S3 has to be pressed to turn it on.

Please refer to image provided below for battery connections