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Appendix A – Changing the SIM Card
Normally a GSM version of Avo unit is shipped with a SIM card already installed. Stevens has relationships
with multiple carriers as a VAR (value added reseller) for their data plans. In the event that the end
customer is using their own local GSM carrier, a SIM card needs to be installed.
To do so, simply follow these steps:
1.
Ensure that the power is disconnected from your Avo GSM unit.
2.
Unscrew and remove the lid on Avo.
3.
Move the power switch to OFF.
4.
Pull back and up on the clip to free the SIM card that has been installed. Slide it out of the clip and
replace it with the new SIM card. Push the clip back down and lock it in place.
5.
Ensure the SD card destin.txt file has the correct APN for the SIM card carrier. Recall in section 3.4
that the file on the SD card needs to be updated in the event of a change of destination or if the
SIM card has changed. For example:
Domain: data.stevens-connect.com
Folders: /incoming
Port #: 80
APN: aer.aerisapn.net
Username:
Password:
In the case of changing a SIM card, the APN: line will need to be changed for the carrier being
used. This can take on many formats and can also include a Username and Password, although
this is rare and often left blank.
6.
Move the power switch to on. Replace the lid and screws.
7.
Assuming good cell coverage and the connection of an antenna, repower the unit. Your Avo GSM
will connect with the tower and server, retrieve its setup information, apply this configuration to
the unit, and begin transmitting your data.