Telegesis ETRX357 zigbee® Radio Modules

The ETRX3 series modules have a footprint of just 19 mm x 25 mm for both standard and PA/LNA versions which represents a 40% reduction in size compared to the ETRX2 module. They will be available with either an on board antennae or a Hirose U.FL connector to allow connection of external antennae. A link budget of 105 dB on the standard ETRX3 module gives excellent performance and RF power can be further boosted by use of the ETRX3-LRS which adds the new SiGe SE2432 front-end module containing both LNA+PA for highest possible link budget. The ETRX3 series are low power 2.4 GHz zigbee Radio modules integrating a 2.4 GHz, IEEE 802.15.4 compliant transceiver with up to 192k of flash, 12k of RAM, and many advanced peripherals. The EM357 and EM351 utilise an efficient architecture that exceeds the dynamic range requirements imposed by the IEEE 802.15.4-2003 standard by over 15 dB. The integrated receive channel filtering allows for robust co-existence with other communication standards in the 2.4 GHz spectrum, such as IEEE 802.11 and Bluetooth®.

Module Specifications

Module Features:

  • EM300 series zigbee SOC featuring 32-bit ARM® Cortex®-M3 processor
  • Up to 192 k of Flash, 12 k of RAM
  • 128 µS Wakeup
  • Improved Hardware MAC Acceleration
  • JTAG Interface for Programming and Debugging
  • Improved Peripherals (ADC, timers etc.)
  • Chip Antenna or U.FL coaxial Connector


  • High RX Sensitivity -99 dBm (-100 dBm Boost)
  • TX output power 3dBm (8 dBm Boost)
  • RX current: 25 mA, TX current: 31mA at 3dBm


  • High RX Sensitivity -106 dBm
  • TX output power +20 dBm (adj. down to -21 dBm)
  • RX current: 31.5 mA, TX current: 140 mA at 20 dBm

Environmental & Qualifications:

  • FCC compliance modular approval
  • CE European Regulations
  • Approvals for Canada, S Africa, Australia & NZ


  • 19mm x 25 mm x 3 mm

Get Started with the ETRX357 Radio Module

ETRX357 Development Kit

The ETRX357 Development Kit is the ideal starting point for development and evaluation of the ETRX357 Module family. The Development Kit allows a zigbee mesh network to be set up in a few minutes without the need for any embedded firmware using the Telegesis AT command line interface running on a host PC.

Buy Kit

ETRX3 Modules Options

Part Number Buy Module Documentation Description
Telegesis Module, Chip Antenna, R309
ETRX357HR Telegesis Module, UFL, R309
ETRX357HR-LRS Telegesis Module, Long Range, UFL, R309
ETRX357HR-LRS-C31 Telegesis Module, Long Range, UFL, CICIE R310 Firmware for Automation Hubs and Gateways
ETRX357-LRS Telegesis Module, Long Range, Chip Antenna, R309
ETRX357-LRS-C31 Telegesis Module, Long Range, Chip Antenna, CICIE R310 Firmware for Automation Hubs and Gateways


Title Version Resource Type
ETRX35xx CE Test Reports and DoC Miscellaneous
ETRXN Factory Default Utility Software 2.0.0 Software
Telegesis Terminal Software for PC 4.0.2 Software
ETRX358USB CE Test Reports and DoC Miscellaneous
PB #1611162: Additional assembly test ship site for ETRX357-LRS ETRX357HR-LRS Product Change Notifications (PCN)
ETRX3 Library 1.0 Schematic and Layout Files
ETRX35x Zigbee Modules Data Sheet 1.20 Data Sheets
Wireless IoT Modules Master Errata for Shield Marking 1.0 Errata
ETRX35x-LRS ZigBee Modules Data Sheet 1.08 Data Sheets
Wireless Selector Guide 7 Brochures
PB #1606031: Inner Box Label Change Product Change Notifications (PCN)
AN0822: Simplicity Studio™ User's Guide 0.5 Application Notes
AN1121: Headless Builds with Simplicity Studio v4 0.1 Application Notes
Using Telegesis Demonstration Software with ETRX3 IPD and Mock Meter Firmware User's Guide 2.0 User Guides
Using Telegesis Terminal with HA Combined Interface and Five-In-One Device Firmware User's Guide 2.0 User Guides
AT Command Set for In-Premises Display Product Manual 3.02 User Guides
UG228: Bootloading New Firmware onto an ETRX358USB User's Guide 0.1 User Guides
ZigBee RangeFinder User's Guide 8.0 User Guides
Using Telegesis Terminal with ETRX3 IPD and Mock Meter Firmware User's Guide 2.0 User Guides
ETRX3DVK Development Kit Quick-Start Guide 1.03 Quick Start Guides
ZigBee RangeFinder Quick-Start Guide 4.0 Quick Start Guides
17040523 UMI-357ARM Devices End of Life (EOL) and Last Time Buy (LTB) Product Change Notifications (PCN)
AN1003: TG-PM-0523-CICIE R3xx CICIE AT Command Set 0.1 Application Notes
ETRX3585-LRS ZigBee® Modules Product Manual 2.0 Application Notes
AN: ETRX2 and ETRX35x ZigBee Modules 2.02 Application Notes
AN: Writing Customized Firmware for the ETRX35x-LRS 1.01 Application Notes
AN: ETRX357 ZigBee Module 2.01 Application Notes
AN: ETRX2 ad ETRX357 Wireless Mesh Networking Modules 1.01 Application Notes
AN1002: ZigBee HA CICIE AT Command Set Usage Scenarios 0.2 Application Notes
AN: Using R3xx Firmware in a Home Automation Network 3.0 Application Notes
ETRX3 Series ZigBee® Modules AT-Command Dictionary 3.09 Reference Manuals
ETRX358x ZigBee® Modules Product Manual 7.0 Reference Manuals
Telegesis ZigBee Communications Gateway Product Manual 4.0 Reference Manuals
AT Command Set for Combined Interface & Control Indicating Equipment Product Manual 13 Reference Manuals
ETRX358x-LRS ZigBee® Modules Product Manual 7.0 Reference Manuals
ZigBee® USB Sticks: ETRX3USB, ETRX3USB-LRS, ETRX3USB+8M, ETRX3USB-LRS+8M Product Manual 4.0 Reference Manuals
Router-E and Router-E-PA Wireless Router Product Manual 1.02 Reference Manuals
ETRX357DVK – Telegesis Development Kit for ZigBee® Technology Product Manual 1.12 Reference Manuals
R3xx Firmware User's Guide 2.00 User Guides
ETRX2-PA and ETRX2HR-PA ZigBee® Modules Product Manual 1.10 Reference Designs
17052273 Relocation of Singapore Test Centre and Order Fulfillment Centre, Modules Product Change Notifications (PCN)
ETRX2 and ETRX2HR ZigBee® Modules Product Manual 1.10 Application Notes
Additional_assembly_test_ship_site_for ERTX module Product Change Notifications (PCN)
180822330 Module Label Change - RoHS Label Only Product Change Notifications (PCN)
Thread usage of 6LoWPAN White Paper from Thread Group 1 White Papers
Thread Stack Fundamentals White Paper from Thread Group 1 White Papers
Thread Battery Operated Devices 1 White Papers
Thread Border Routers White Paper from Thread Group 1 White Papers
Thread Commisioning White Paper from Thread Group 1 White Papers
AN1118 Supporting Materials Application Notes
Wireless Starter Kit (WSTK) Mainboard BRD4001A Schematic A01 Schematic and Layout Files
AN1117: Migrating the Zigbee HA Profile to Zigbee 3.0 0.2 Application Notes
AN1118: Certifying Zigbee 3.0 Devices 0.3 Application Notes
AN1144: Using Device Management Service with Zigbee Gateways 0.2 Application Notes
EmberZNet SDK Release Notes 6.3 Release Notes
EmberZnet SDK Release Notes 6.3 Release Notes
AN1136: Using the Thread Test Harness in Auto Device Under Test Mode 0.1 Application Notes
AN1017: Zigbee® and Thread Coexistence with Wi-Fi 1.4 Application Notes
AN728: Over-the-Air Bootload Server and Client Setup 1.0 Application Notes
AN1160: Project Collaboration with Simplicity Studio 0.1 Application Notes
UG103.2: ZigBee Fundamentals 1.1 User Guides
AN1135: Using Third Generation Non-Volatile Memory (NVM3) Data Storage 0.5 Application Notes
UG103.15: Silicon Labs Green Power Fundamentals 0.2 User Guides
UG305: Dynamic Multiprotocol User’s Guide 0.5 User Guides
UG103.16: Multiprotocol Fundamentals 0.2 User Guides
AN1154: Using Tokens for Non-Volatile Data Storage 0.3 Application Notes
UG103.6: Bootloading Fundamentals 1.3 User Guides
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