Introduction
This manual provides information for interfacing the RV50(X) Sierra Wireless AirLink® 4G LTE Cellular Modem to Campbell Scientific data loggers.
The RV50(X) digital cellular modem is manufactured by Sierra Wireless® and supports network operator switching based on the SIM(s) for use on GSM (Global System for Mobile Communications) and CDMA (Code Division Multiple Access) networks. The modem is accessed through the Internet using TCP/IP communications protocol.
Use of the RV50(X) requires a VerizonLTE or AT&T® HSPA+/LTE business account or an equivalent account from Campbell Scientific or another service provider. For more information, see Establish cellular service.
The RV50 also supports Verizon® CDMA/1xRTT/EVDO and AT&T®HSPA+/LTE accounts.
For additional information on the RV50(X) module, see the Support section of the Sierra Wireless website.
Before using the RV50(X), please review:
The RV50(X) module may be configured in one of two ways, depending on the communications type and needs of the user. ACEmanager, a web based configuration tool is hosted by the RV50(X). It can be accessed using a web browser over the cellular WAN or locally over Ethernet. A number of templates will be provided for download to make most configurations very simple once connected to ACEmanager.
For many applications, the preferred module setup is Point-to-Point Protocol (PPP) mode. In this mode, the module simply passes IP communications directly to the data logger. This enables features such as FTP, HTTP, and emailing. QuickStart describes setting up the module for PPP mode. See the EmailRelay() paper 
and Blog article with example programs 
for more information on emailing.
Alternatively, for applications that just need a connection for data collection and data logger maintenance or monitoring, setup as a serial server is sufficient. In this mode, the module receives IP communications over the cellular network and converts those to serial (RS-232) communications to pass on to the data logger. From the data logger perspective, this is no different than a serial cable connecting it to a computer. For information on configuring the
RV50(X) in serial-server mode, see ACEManager and template files