09-02-2016, 10:05 PM
(09-02-2016, 10:06 AM)MarkHaysHarris777 Wrote: The VBAT is absolutely necessary for real-life practical use of this gps unit... otherwise boot-up and acquisition of fix can take anywhere from 15 minutes to a couple of hours !
15 minutes to a couple of hours? But the datasheet says that a cold start acquisition typically takes 35 second (and so does the adafruit overview)! Now, since it says typically, I could see you padding it out to say... 1 minute, but not 15 minutes to hours? I have the exact same breakout from Adafruit, and with the battery removed, it can lock on in just under 30 seconds when in open sky on a clear day.
Perhaps this is this when you're running the on-board ceramic antenna and are using it indoors? As those numbers would make sense then, as its much harder to acquire a signal... even then, it can be touch and go if you get a lock at all or not.
