c
2014 Decagon Devices Inc.
All Rights Reserved.
Using Em50G with a User Supplied SIM
Follow steps 1 through 10 to operate a user-supplied SIM in the
Em50G data logger. See the troubleshooting issues after step 10 if
you need assistance.
1. Obtain a standard-sized SIM from your local GSM cellular car-
rier to enable EM50G internet data service without needing a
proxy setting. The Em50G does not use voice, SMS (texting),
or WAP protocols and typically uses less than 500 KB data
per month. The cellular carrier must supply the APN setting
to access internet data and may also provide a user name and
password. The Em50G does not require a public or fixed IP
address and does not use mobile-terminated services.
2. To install the SIM, first unscrew the four screws on the Em50G
printed circuit board (PCB). Carefully tilt the PCB up and
forward to expose the back while leaving the antenna cable
connected to the cellular module. Do not unscrew the antenna
connector from the Em50G case or disconnect the antenna ca-
ble from the cellular module.
3. Slide the top of the SIM holder back towards the cellular mod-
ule to unlock the SIM. Insert the new SIM into the holder with
the correct orientation. Close the holder and slide the top of
the holder away from the cellular module to lock the SIM in
place. Put the PCB back in the Em50G case.
4. Launch the latest version of ECH2O Utility from:
http://www.decagon.com/support/ech2o-utility-download/
5. Connect the Em50G to ECH2O Utility, choose “Show Termi-
nal” to view the serial commands sent between the Em50G
and ECH2O Utility. Type commands in the lower left text box
(Figure 1)
6. Type the following command in the command box:
set -apn
<apn setting>
where
<apn setting>
is the APN setting
provided by the cellular carrier.
1
