Datasheet

Antenna, Battery and More!

LEDs

We love LEDs! There are three LEDs on board to help you with debugging and status updates:

Green PWR LED tells you that there is a good 3V power supply. If this isn't on, there's a serious

problem with the power supply, perhaps the battery died

Yellow L13 (and SD card access) LED is connected to digital 13, this is handy for telling when the

Arduino is bootloading and also will flicker whenever the SD card is accessed.

Red FIX LED is connected to the GPS's fix output. When this is turning on/off once a second it does

not have a fix. When it blinks once every 15 seconds, the GPS has a fix.

Antennas

All Ultimate GPS shields have a built in patch antenna - this antenna provides -165 dBm sensitivity

and is perfect for many projects. However, if you want to place your project in a box, it might not be

possible to have the antenna pointing up, or it might be in a metal shield, or you may need more

sensitivity. In these cases, you may want to use an external active antenna. (http://adafru.it/960)