Microhard Systems Inc 07P23 Manuel D’Utilisation
MHX2421 Operating Manual: Chapter2 General
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2. General
2.0 Product Overview
The MHX2421 is a high-performance embedded wireless data transceiver.
Operating in the 2400 - 2483.5 MHz ISM band, this a spread-spectrum
module is capable of providing reliable wireless data transfer between
almost any type of equipment. The small-size and superior RF performance
of this module make it ideal for many applications.
While a pair of MHX2421 modules can link two terminal devices (“point-
to-point” operation); multiple modules can be used together to create a
network of various topologies, including “point-to-multipoint” and
“repeater” operation. Multiple independent networks can operate
concurrently, so it is possible for unrelated communications to take place in
the same or a nearby area without sacrificing privacy or reliability.
Operating in the 2400 - 2483.5 MHz ISM band, this a spread-spectrum
module is capable of providing reliable wireless data transfer between
almost any type of equipment. The small-size and superior RF performance
of this module make it ideal for many applications.
While a pair of MHX2421 modules can link two terminal devices (“point-
to-point” operation); multiple modules can be used together to create a
network of various topologies, including “point-to-multipoint” and
“repeater” operation. Multiple independent networks can operate
concurrently, so it is possible for unrelated communications to take place in
the same or a nearby area without sacrificing privacy or reliability.
1.1 Features
Key features of the MHX2421 include:
transmission within a public, license-exempt band of the radio
spectrum
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– this means that it can be used without access fees
(such as those incurred by cellular airtime).
a serial I/O data port with handshaking and hardware flow
control, allowing the MHX2421 to interface directly to any
equipment with an asynchronous serial interface.
equipment with an asynchronous serial interface.
ease of installation and use – the MHX2421 module uses a
subset of standard AT style commands, very similar to those
used by traditional telephone line modems.
used by traditional telephone line modems.
all units in a system are physically identical, and can be
configured as a master, repeater or slave using the AT
command set. No hardware modifications are required
command set. No hardware modifications are required
128 sets of user-selectable pseudo-random hopping patterns,
intelligently designed to offer the possibility of separately
operating multiple networks while providing security,
reliability and high tolerance to interference.
operating multiple networks while providing security,
reliability and high tolerance to interference.
encryption key with 65536 user-selectable values to maximize
security and privacy of communications.
32-bit of CRC error detection and auto re-transmit to provide
accuracy and reliability of data.
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902-928 MHz, which is license-free within North America; may need to be factory-
configured differently for some countries.