Datasheet

Assembly with stacking headers
If you want to attach another shield on top, you can use stacking headers. These headers provide a
'pass-thru' connection so multiple shields can be attached. However, if you put a shield on top, its
likely it will cover the GPS patch antenna so you may need to get an external GPS
antenna (http://adafru.it/960). Stacking headers also make the project taller (harder to fit into a small
box) and the headers are thinner so connection is not as strong (so if the project is going to be
shaken around a lot it may not make good connections during harsh movement)
If you want to go with stacking headers, place the the shield PCB on top of the Arduino and fit the
long pins through the pads until they slot into the Arduino. Depending on which version/type of
Arduino you may need to use 2 x 8pin and 2 x 6pin or 1 x 10pin, 2 x 8pin and 1 x 6pin.
Turn the Arduino upside down so its resting on the long parts of the stacky headers and solder them
from below
If you want to go with stacking headers, place the
the shield PCB on top of the Arduino
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