Hardware Reference
In-Depth Information
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7805
Voltage Reg
In
Figure 8-10
EM-406a GPS receiver attached to a
Bluetooth radio. In order to get a real
GPS signal, you'll have to go outside,
so wireless data and a battery power
source are handy.
+5V Ou
t
to battery +
to battery -
NOTE:
If your power is inconsistent,
add in the decoupling capacitors on
the input and output sides of the
regulator, as seen in other projects
using this regulator.
CTS
+5V
GND
TX
RX
RTS
PPS
GND
Bluetooth
Mate
TX
RX
+5V
GND
EM-406A
GPS Receiver
There are several types of
sentences
within the NMEA
protocol, and each serves a different function. Some tell
you your position, some tell you about the satellites in
view of the receiver, some deliver information about your
course heading, and so on. Each sentence begins with a
dollar sign (
$
), followed by five letters that identify the
type of sentence. After that come each of the parameters
of the sentence, separated by commas. An asterisk comes
after the parameters, then a checksum, then a carriage
return and a linefeed.
