User Manual

User Manual
Page 77 of 78
Pins 1 and 2 must be supplied with 3.0 Volts and powers the digital and RF functional entities of the modem.
The modem has internal filtering circuitry to smooth out the supply voltage but it has no onboard regulators.
All of the remaining pins of the modem are I/O lines of the processor.
The voltage on any of the I/O lines should never exceed VCC+0.3 V.
Pins 1 and 3 are the TX and RX pins of UART 1. Pins 4 and 6 are the TX and RX of UART2. If connecting to
the serial port of a PC, a level-shifting transceiver must be employed in order to provide the appropriate voltage
levels on the RX and TX lines.
3. Operation of the Nivis Radio Modem
Communication with the NIVIS radio modem happens through serial port 1. The baud rate is set to be 9600,
8N1.
3.1. Getting started
Open a terminal software on a serial port with the above settings and connect to the RF modem. Any command
is single line followed by enter command. Format of command is: command param1 param2 … <enter>
Typing “help” will bring up a list of commands with a detailed description of each command.
4. RF Exposure Limit Warning
To comply with FCC’s RF exposure limits for general population / uncontrolled exposure, the antenna(s) used
for this transmitter must be installed to provide a separation distance of at least 20cm from all persons and must
not be co-located or operating in conjunction with any other antenna or transmitter.
5. Compliance Statement (Part 15.19)
This Device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference, and
2. This device must accept any interference received, including interference that may cause undesired
operation.