Now available: The LR 11 868MHz and LR 11 915 MHz click boards, powered by our RM126x modules!

The Ezurio RM126x series of modules (RM1261 and RM1262) is based on Silicon Labs EFR32 SoC and the Semtech SX126x radio. They provide a low power, long range solution for you to easily develop your LoRaWAN implementation. The RM126x series supports LoRaWAN classes A, B and C,  and also includes a LoRa Point to Point (LoRa P2P) capability which enables you to create your own private ultra-long range radio network between two RM126x modules.

The RM126x series modules are small form factor PCB modules with a built in MHF4 connector, TCXO and a DC-DC converter. The module is designed to operate in both hosted and hostless modes.

  • Hosted Mode – When connected to an external microcontroller, it can be simply and easily programmed with our AT command set.
  • Hostless Mode – Utilizing the powerful Cortex-M33 core which includes 512kB flash and 32K of RAM. Full support is offered by Silicon Labs' Simplicity Studio for development purposes with a range of sample applications being offered by Ezurio to simplify customer development.
  • Small Form Factor – 14mm x 13mm PCB module designed for compact IoT devices.
  • LoRa P2P Communication – Enables you to create your own proprietary wireless network.
  • Quick to market - Built in TCXO, DC-DC converter and on board MHF4 antenna connector.
  • Ultra-Low Power Consumption - Years of use on a single battery.
  • Qualified Ezurio Sub Ghz Antennas - Certified to work with Ezurio Sub-GHz FlexPIFA, Sub-GHZ i-FlexPIFA and Sub-GHz Flexdipole antenna. 
  • LoRaWAN Certified - RM1261 and RM1262 (Test Reports)

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Start prototyping your next IoT application today.

The RM1262 kit contains:

  • RM1262 DVK Board (exposes all available HW interfaces)
  • 1x USB cable
  • 1x Ezurio i-FlexPIFA antenna (902-928 MHz)

The RM1261 kit contains:

  • RM1261 DVK Board (exposes all available HW interfaces)
  • 1x USB cable
  • 2x Ezurio i-FlexPIFA antenna (863-870 MHz and 902-928 MHz)
453-00140-md.png
  • 453-00139-K1

    453-00139-K1

    Recommended for New Design (RND)

    Development Kit, RM1262, SX1262, MHF4

    Learn More
  • 453-00140-K1

    453-00140-K1

    Recommended for New Design (RND)

    Development Kit, RM1261, SX1261, MHF4

    Learn More
Chipset
Silicon Labs EFR32
Dimensions (L x W x H)
14 x 13 x 2
Connector
MHF4
Certifications
RM1262: FCC, ISED, AS/NZS
RM1261: EU, UKCA, NCC, MIC, IN
Data Rate
LoRa 125kHz
LoRa 250kHz
LoRa 500kHz
FSK 50kbps (as per RP002-1.0.3 )
Frequency Range
863 MHz - 870 MHz
Frequency Range 2
902 MHz - 928 MHz
LoRa Version Class
Version V1.0.4 LoRa MAC Class A,B & C
Operating Temp (°C)
-40 °C - +85 °C
Part Number
  • 453-00139C
  • 453-00139R
  • 453-00140C
  • 453-00140R
Price @ 1k
  • N/A
Chipset (MCU)
  • Silicon Labs EFR32
Chipset (Wireless)
  • Semtech SX1261
  • Semtech SX1262
Connector
  • MHF4
Frequency Range (Max)
  • 870 MHz
  • 928 MHz
Frequency Range (Min)
  • 863 MHz
  • 902 MHz
Frequency Range 2 (Max)
  • N/A
  • 928 MHz
Frequency Range 2 (Min)
  • N/A
  • 902 MHz
Packaging
  • Cut Tape
  • Tape / Reel
Power Consumption (Tx)
  • Up to 14dBm
  • Up to 22dBm
Product Type
  • Embedded Module
453-00139C
453-00139C
Active
Buy Options
N/ASilicon Labs EFR32 Semtech SX1262 MHF4 928 MHz902 MHzCut Tape Up to 22dBm Embedded Module
453-00139R
453-00139R
Active
Buy Options
N/ASilicon Labs EFR32 Semtech SX1262 MHF4 928 MHz902 MHzTape / Reel Up to 22dBm Embedded Module
453-00140C
453-00140C
Active
Buy Options
N/ASilicon Labs EFR32 Semtech SX1261 MHF4 870 MHz863 MHz928 MHz902 MHzCut Tape Up to 14dBm Embedded Module
453-00140R
453-00140R
Active
Buy Options
N/ASilicon Labs EFR32 Semtech SX1261 MHF4 870 MHz863 MHz928 MHz902 MHzTape / Reel Up to 14dBm Embedded Module

Product Brief 1 total

Name
Part
Last Updated
Product Brief - RM126X Series All 05/14/2024

Datasheet 1 total

Name
Part
Last Updated
Datasheet - RM126x LoRaWAN Module All 04/10/2024

Software 2 total

Name
Part
Last Updated
Firmware - RM126x Series (GitHub) All 08/15/2023
RM126x GSDK Extension (GitHub) All 02/05/2025

Can I send a binary stream in P2P Mode?

Can I configure RM1261 to operate in the 9xx MHz range via AT commands?

What data rates are available for LoRaWAN and p2p in RM1262 in US?

No UART messages show up after adding USART0 through configurator in Simplicity Studio.

Why Epoch time is required for RM126x p2p in US?

"Debug access is locked" message popped up while programming custom C application.

How can I send downlink LoRaWAN message from AWS?

Is it safe to test P2P functionality with RM126x modules when they are in close proximity?

Is it safe to set up a LoRaWAN communication between a module and a gateway in close proximity?

What tools are required for RM126x module Hosted Mode vs Hostless Mode?

Which LoRa / LoRaWAN Basics Modem (LBM) stack and software library version is the AT Interface app for the RM126x series based on?

Do you provide support for the RM126x and Lyra development boards through the Simplicity Studio 5 Software & IDE?

What sort of power consumption should I expect when using Laird RM126x P2P mode?

Can I switch the RM126x LoRaWAN Class device on the fly?

Can I really expect 15 km distance transmission using LoRaWAN in my day to day application operation?

What Error 14 means when trying to start an RM126x P2P session?

How to lower the latency in my RM126x P2P network in Europe?

Is there a programming way to differentiate RM126x variant if I develop my own firmware?

How RM1261 P2P message channels and duty cycle are managed in Europe?

When using RM126x P2P mode, do the beacon and data rates need to match?

When using RM126x P2P mode, can I queue multiple messages to be sent?

When using RM126x P2P mode, what does Class: [Fail] error message mean?

How can I build my own UART DFU utility (also known as uart_dfu or bt_host_uart_dfu) under Windows and/or Linux?

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