J
@mj just to be clear, a GPS receiver needs to receive a good signal from several satellites for several minutes before it can give a position. The TTFF (time to first fix) may be even longer in some cases.
This generally means you need to be outside (preferably not in a narrow street with tall buildings on both sides), with a good view of the open sky.
In some situations you may be able to get a fix while inside close to a window, but YMMV significantly.
Note that this applies to any GPS receiver. Phones are not good examples, as they more often get their position from wireless networks (cellular, Wi-Fi...) around them coupled with a database which maps visible networks to a position, and only revert to actual GPS in limited situations. That is not the case of a “pure” GPS receiver like the Pytrack which uses only GPS data received from the satellites.
Haven’t used the Pytrack myself, but I suppose that like most receivers there’s a mode that would give you information about the satellites it sees, this can be helpful. Also don’t know if the Pytrack can save some of the information received (almanac, ephemeris...) and/or if there’s a way to supply it to the chip (A-GPS). If it doesn’t the TTFF can be very very long as some of the information required is broadcast by the GPS satellites at a very very slow rate and it can take over 30 minutes to receive the whole thing.
