6 EM50R RADIO TELEMETRY Em50 Series
6.1.2 Transmit Best Practices
Transmit modes are most useful when you have three or more loggers
installed within radio range of each other. There is no set limit to
the number of radio loggers broadcasting to a DataStation. Use this
mode for as few as one logger and as many as 50 or more loggers.
You should use the Telemetry Test feature of ECH20 Utility to test
the connection from your logger to the DataStation.
Note: Em50R loggers must have firmware version 1.12 or later to
enable the Confirmed Delivery Transmit mode and Telemetry Test
feature. Your DataStation must have firmware version 1.09 or later
to receive Confirmed Delivery Transmit mode data packets. Contact
Decagon for an application note that covers the steps needed to up-
grade your hardware.
Note: See section on DataStation Networks for step by step instruc-
tions for configuring your DataStation and remote radio loggers.
6.2 Two-Way Radio Telemetry
The two-way Telemetry Mode lets you establish a two-way connec-
tion with a remote radio logger. Once connected to the remote logger,
you can download data and change most settings just like you were
connected directly to the logger with a serial cable. Communicat-
ing with a remote radio logger requires you to have a Rm-1 radio
modem connected to your computer. Connect to the remote radio
logger through the Rm-1.
When a logger is in a two-way Radio Mode, it turns on its radio every
45 seconds. While the radio is on, the logger listens for connection
attempts from a Rm-1. If the logger does not hear any connection
attempts, it turns off the radio. If the logger hears a connection at-
tempt, it leaves the radio on for several seconds listening for login
commands from ECH20 Utility. It takes up to 60 seconds to connect
to the remote logger.
When you are finished interacting with the remote radio logger, you
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