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About the Embedded module
antenna function best when placed perpendicular to each other (one straight, the other up or down)
to prevent interference from each other.
Another option for both signal reception and design flexibility is to use an antenna extension cord (Digi
part number DC-ANT-E-24DP) to separate the antenna from the module. This allows the module to fit
inside your product but the antenna to be placed outside the device.
Connectors: power and serial interface
This single 12-pin, serial interface port (labeled P4 for Digi Connect EM and P5 for Digi Connect Wi-EM)
supports 2 TTL serial interfaces, data rates up to 230 Kbps and full-modem control (on port 1). See the
figure for help locating pins and the table for pin assignments.
Power and serial interface
Digi Connect EM and Digi Connect Wi-EM Hardware Reference
Power and Serial Interface Pin Assignments
Pin
Signal Name
1
VCC
2
GND
3
RXD/GPIO-7
4
TXD/GPIO-6
5
RTS/GPIO-4/SPI_CLK
6
DTR/GPIO-5
7
CTS/GPIO-2
8
DCD/GPIO-1/SPI_EN Port 1 DCD (input)/GPIO-1/SPI enable
Connectors: power and serial interface
Description and Notes
+3.3 VDC (input only)
Reference Ground for input power
Port 1 RXD (input)/GPIO-7
Port 1 TXD (output)/GPIO-6
Port 1 RTS/GPIO-4/SPI clock
Port 1 DTR (output)/GPIO-5
Port 1 CTS (input)/GPIO-2
11
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