ETRX357HR-LRS Telegesis Ltd, ETRX357HR-LRS Datasheet - Page 13

• Manufacturer Part Number: ETRX357HR-LRS
• Description: MODULE, ZIGBEE, ETRX3, PA+LNA, HIROS
• Manufacturer: Telegesis Ltd
• Series: -r

Specifications of ETRX357HR-LRS

• Rohs Compliant: YES
• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: General Purpose
• Power - Output: 20dBm (100mW)
• Sensitivity: -106dBm
• Voltage - Supply: 2.1V ~ 3.6V
• Current - Receiving: 33mA
• Current - Transmitting: 140mA
• Data Interface: Solder Pad
• Memory Size: 128kB Flash, 12kB RAM
• Antenna Connector: U.FL
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

ETRX351-LRS and ETRX357-LRS
5 Firmware Description
The modules will be pre-loaded with a standalone bootloader by Ember, which supports over-the-
air bootloading as well as serial bootloading of new firmware.
In order to enter the standalone bootloader using a hardware trigger pull PA5 to ground and
power-cycle or reset the module. To avoid entering the standalone bootloader unintentionally
make sure not to pull this pin down during boot-up unless the resistance to ground is >10kΩ.
A
pull-up is not required).
In addition to the standalone bootloader the modules also contain the current release of the
Telegesis AT-style command interface as described in the Telegesis AT command dictionary and
the Telegesis user guide. Check www.telegesis.com for updates. Each module comes with a
unique 64-bit 802.15.4 identifier which is stored in non-volatile memory. The commands and
responses pass through the serial port of the ETRX35x-LRS as ASCII text, so a simple terminal
application will usually suffice. Telegesis Terminal is provided as a development tool, but it is not
an essential feature.
The pre-loaded AT-style command interface firmware is based on the latest EmberZNet meshing
stack which implements routers/coordinators as well as (sleepy) end devices. [End devices have
no routing responsibility and therefore are allowed to go to sleep, whilst still being able to send and
receive messages via a parent router. In addition to a classical (sleepy) end device the module
firmware also supports mobile (sleepy) end devices capable of changing their parent quickly
whenever they change their position within the network.]
A router is typically a mains powered device whilst a sleepy end device (SED) can be battery
powered.
The module is also able to act as a PAN coordinator and Trust Centre through external host
control. The AT style command line supplies all the tools required to set up and manage a ZigBee
network by allowing easy access to the low-level functionality of the stack.
The Telegesis firmware uses the meshing and self healing EmberZNet PRO stack to overcome
®
many of the limitations of the tree network topology of the ZigBee
2006 stack by using the ZigBee
PRO feature-set.
The Telegesis firmware also allows low-level access to physical parameters such as radio channel
and power level. Parameters that define the functionality of the ETRX35x-LRS module and also
allow standalone functionality are saved in non-volatile memory organised in so-called S-
Registers. The SPI and I2C buses are not supported by the current firmware release, but can be
used with custom firmware.
5.1 Custom Firmware
For high volume customers the firmware can be customised on request. Customers can use the
ETRX35x-LRS module as hardware only and develop application specific firmware based on the
EmberZNet stack. In order to develop custom firmware the Ember Insight tool-chain is required.
©2011 Telegesis (UK) Ltd
- 13 -
ETRX35x-LRS Product Manual