RC11xx(HP)-TM
RC25xx(HP)-TM
RC17xx(HP)-TM
2016 Radiocrafts AS
RC11xx(HP)/25xx(HP)/17xx(HP)-TM Data Sheet rev. 1.48 Page 16 of 86
2016 Tiny Mesh AS
Radiocrafts
Embedded Wireless Solutions
Circuit Description
The Tinymesh™
module contains a communications controller with embedded Tinymesh™ protocol
stack firmware, a high performance RF transceiver and an internal voltage regulator.
The communications controller handles the radio packet protocol, the UART interface and controls the
RF transceiver. Data to be sent by the host is received at the RXD pin and buffered in the
communications controller. The data packet is then assembled with preamble, start-of-frame delimiter
(SOF), network routing information and CRC check sum before it is transmitted on RF.
The RF transceiver modulates the data to be transmitted on RF frequency, and demodulates data that
are received. Received data are checked for correct address and CRC by the communication controller.
If the address matches the module's own address, and no CRC errors were detected, the data packet is
acknowledged before re-transmitted.
The asynchronous UART interface consists of RXD, TXD, RTS and CTS. The CTS output will be TRUE
LOW when the module is ready to receive data. CTS must be monitored on a
byte-by-byte basis
to
avoid losing data when the default CTS handshake configuration is enabled.
When the CONFIG pin is pulled low, the communications controller interprets data received on the RXD
pin as configuration commands. There are commands to change the radio channel, the output power,
the RF Data Rate etc. Configuration parameters are stored in non-volatile memory. For a full overview of
configuration commands, please see
MODULE CONFIGURATION
Selecting the Right Module for Your Application
Radiocrafts modules with embedded Tinymesh™ Protocol Stack are available for all the international
license free frequency bands, in two different selections of output power, and as high performance, long
range Ultra Narrow Band version. As new members are added to the Radiocrafts family of modules, the
Tinymesh™ Stack will be introduced on the new platforms.
All Radiocrafts modules are fully tested and footprint-compatible, allowing equipment manufacturers to
use the same electronics design for several markets and varying applications.
The inherent capability to select and configure communications parameters in the protocol stack
provides an unsurpassed level of flexibility in adapting the design to the application requirements.
The right module for your application may be selected from a decision matrix weighting the importance
of radio range coverage, RF compliance requirements, customer requirements, hardware cost and
available power supply limitations.
Note: High- and Low power modules should not be mixed in the same network, unless the output power
settings for all modules are limited to the same dBm level.
Transmission from the higher powered module may be received by the lower powered module, while the
high powered module will not be able to detect transmission from the low power device.
End Devices or Router Devices configured to transmit in
FIXED DESTINATION AND
“Walk By” Mode
represent an exception to the rule, as these devices will transmit without expecting a response (ACK)
and hence will not require a balanced connection link.
Indicative Module Selection Guide
Lower RF frequency
Higher RF frequency
