The X2’s various telemetry options are what allow the system to provide real-time data to users all around the globe. There are several different options that all have their own benefits and downsides.


All X2 units have Wi-Fi telemetry built into the device. Wi-Fi can be used to establish a direct connection between the X2 and a user’s device (Laptop/Smartphone/Tablet) or to connect the X2 to an existing Wi-Fi network. When it is connected to an existing Wi-Fi network that has internet access, the X2 is able to transmit data in real-time.

For more information on how to configure the X2 to connect to an existing Wi-Fi network, see the Connect an X2 to a Wi-Fi Network article.

Advantages: No monthly cost; Included in all X2 units

Disadvantages: Requires the X2 to be located within an existing Wi-Fi network; Setup requires some knowledge of network configuration


X2-R units are great in two situations. The first is when the X2 logger is located nearby an existing building that has electricity and an internet connection. When this is the case, a PC and base radio can be setup in the building and communicate to the remote X2 wirelessly. The second is when there is a network of X2 loggers placed in close proximity. The X2’s radio mesh network allows all of the nodes to communicate with each other and send their data to a PC base station or a single radio to cellular bridge (one recurring cell charge instead of several).

Advantages: No monthly cost

Disadvantages: Requires the X2 to have line of sight with the receiving node/station


X2-C units have an embedded cellular module built into the body. This module provides cellular connectivity to the internet in the same manner a cell phone is connected. Cellular units are great for more remote deployments that are not located close to existing infrastructure or buoy based systems that sit offshore. Cellular telemetry is the most commonly used type and NexSens provides hosting services to reduce the complexity and hassle of working with the cell provider directly.

Advantages: No setup when using NexSens hosted service

Disadvantages: Monthly/annual cost; Location must have cell coverage


X2-I units are designed for the most remote deployment locations. With Iridium satellite connectivity, these units can be placed in almost any location and reliably transmit data. The only requirement for an Iridium unit is a clear view of the sky.

Advantages: Works in very remote areas

Disadvantages: High monthly/annual cost