GPS module

Very few GPS receivers work indoors, the sattelites only have 50 watt transmitters and the antennas are set up to cover the globe rather than be directional, so the signal is really weak. Most won't even work under heavy tree cover.

Interested in=20

building.

Depends on if you want to use it for clock or for positioning. If you = are just using it as a timesource then you will need to position the = antenna where it can receive enough signal. Positioning is a probable = negative.

If you require indoor gps then look for a high sensitivity one (AGPS) module. As well as being much more sensitive than standard GPS they can also use assistance data via a GSM network for position location.

Cheers Spen