EdgeBox-RPI-200 User Manual
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NOTE：
1. make sure the i2c-1 driver point is open, and the point is closed default.
2. the estimated backup time of the RTC is 15 days.
Product Change NOTE：
OLD Revision: The chip of RTC is MCP79410 from microchip. It is mounted on the system
I2C bus. The i2c address of this chip should be 0x6f. To enable it you need to:
Open /etc/rc.local AND add 2 lines:
echo "mcp7941x 0x6f" > /sys/class/i2c-adapter/i2c-1/new_device
hwclock -s
Then reset the system and the RTC is working.
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