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Tips and questions relating to the GPS modules from SFE
By martinthomas
#17467
With my EM-406, I noticed that if I provide 4.75v or less for main power, it never locks.. the datasheet says it should work down to 4.5v.

I am using it indoors with success when I provide 5v and when I use 4.79v (from the sparkfun cp2103 usb-uart module), it loses lock but continues to spit out messages.

//Martin