Hi,
1. MOD_GPS has in specification:
Internal Back-up battery 3.0V, 5.5mAh, Lithium battery
So why don't work save parameters in BBR? (Battery Backup registers)
2. What are logic levels for TxD RxD pins?
From spscification: Interface serial CMOS, 9600 bps, 8N1
CMOS 5V or CMOS 3.3V
Is RxD 5V tollerant?
Are there any buffers between pins and uBloxModule?
Regards
TeleVox