SIM508 EVB User Guide
SIMCOM
You will see the GPS indicator (RX/TX_LED) on the EVB glittering at a 1Hz frequency, then
you can judge whether the EVB and the GPS part of SIM508 is running or not. No function
and test can be executed when we have not connected necessary accessories.
Note: Be sure of both shifter S3 and shifter S4 is on RUN state when the GPS part of
SIM508 is running normally, otherwise the GPS part of SIM508 will be on a undetermined
state.
6.1.2 Tracking the satellite signals
(1) Connect the serial port line to the GPS_COMA serial port
(2) Connect the GPS antenna to the SIM508 module using an antenna transmit line
(3) Run the GPS part of SIM508 as 6.1.1 described
(4) Then you will see the information transmitted by the GPS_COMA serial port in our demo
tool or through Hyper Terminal (AT Command widow)
6.1.3 Downloading
(1) Connect the serial port line to the GPS_COMA serial port,.
(2) Connect the direct current source adapter
(3) Switch shifter S3 on RUN state and shifter S4 on the D/L state
(4) Switch shifter S2 on the ON state and shifter S6 on the GPS_RXA state. (See note)
(5) Switch shifter S7 on the ON state
(6) Run the download program and press the execute key, and then the download procedure is
executing immediately.
Note: Step (4) is only for the judgement while program downloading form the PC side by
the glittering of the LED on EVB board, if you don’t need this visual indication or you can
judge by the response of the download program on the PC side directly, you can jump to
step (5) directly
。
6.1.4 Turn off and Reset
(1) Turn off: Switch shifter S7 on the OFF state, that will cut the power supply for the GPS
part directly, and then the GPS part of SIM508 will be turned off immediately.
(2) Reset: Press the button Z2 and release it lightly, the GPS part of SIM508 will reset
immediately, it’s necessary when system is running on a emergent state or encountering a
unpredictable malfunction and so on .
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