RM126x Ultra-Low Power LoRaWAN Module
Overview
The Laird Connectivity RM126x series of modules (RM1261 and RM1262) is based on Silicon Labs EFM32 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 Laird Connectivity 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 Laird Connectivity Sub Ghz Antennas - FlexPIFA and i-FlexPIFA antennas under development for use with RM126x.
Register For a Chance to Win: RM126x DVKs
Start prototyping your next IoT application today. Stay up to date and register for a chance to win one of 6 RM126x Series development kits.
The RM1262 kit contains:
- RM1262 DVK Board (exposes all available HW interfaces)
- 1x USB cable
- 1x Laird Connectivity i-FlexPIFA antenna (902-928 MHz)
The RM1261 kit contains:
- RM1261 DVK Board (exposes all available HW interfaces)
- 1x USB cable
- 2x Laird Connectivity i-FlexPIFA antenna (863-870 MHz and 902-928 MHz)

Specifications
RM1261: EU, UKCA, NCC, MIC, IN
LoRa 250kHz
LoRa 500kHz
FSK 50kbps (as per RP002-1.0.3 )
Part Number | Chipset (MCU) | Chipset (Wireless) | Connector | Frequency Range (Max) | Frequency Range (Min) | Frequency Range 2 (Max) | Frequency Range 2 (Min) | Packaging | Power Consumption (Tx) |
---|---|---|---|---|---|---|---|---|---|
453-00139R Recommended for New Design (RND) Buy Now | Silicon Labs EFR32 | Semtech SX1262 | MHF4 | 928 MHz | 902 MHz | Tape / Reel | Up to 22dBm | ||
453-00139C Recommended for New Design (RND) Buy Now | Silicon Labs EFR32 | Semtech SX1262 | MHF4 | 928 MHz | 902 MHz | Cut Tape | Up to 22dBm | ||
453-00140R Recommended for New Design (RND) Buy Now | Silicon Labs EFR32 | Semtech SX1261 | MHF4 | 870 MHz | 863 MHz | 928 MHz | 902 MHz | Tape / Reel | Up to 14dBm |
453-00140C Recommended for New Design (RND) Buy Now | Silicon Labs EFR32 | Semtech SX1261 | MHF4 | 870 MHz | 863 MHz | 928 MHz | 902 MHz | Cut Tape | Up to 14dBm |
Development Kits
Documentation
Certified Antennas
How can I build my own UART DFU utility (also known as uart_dfu or bt_host_uart_dfu) under Windows and/or Linux?
The UART DFU utility (also known as uart_dfu or bt_host_uart_dfu) is provided by Silicon Labs. It is a console application which enables firmware updates over a serial UART connection.
This host example is available in C and part of the official Gecko SDK (GSDK). In Windows the application can be built using, for example, MinGW or Cygwin. Under Linux or Mac the program can be compiled with the GCC toolchain.
Before starting, please make sure that Simplicity Studio 5 is installed on your Windows or Linux system. The Gecko SDK − 32-bit and Wireless MCUs technology / software component is mandatory, and the latest available version can be downloaded through the Installation Manager in Simplicity Studio at any time if needed.
Windows
You can either find the UART DFU host example under C:\SiliconLabs\SimplicityStudio\v5\developer\sdks\gecko_sdk_suite\
- Download the latest available Mingw-w64 compiler binaries for Windows and extract them e.g. under C:\mingw64 with 7-Zip. In our example we are using the x86_64-12.2.0-release-posix-seh-rt_v10-rev0.7z release on a Windows 10 Enterprise (21H2) x64 system.
- Search under Windows for the Edit environment variables for your account shortcut or quick access item. Under User Variables, modify the Path variable. Click Edit and New and add your MinGW-w64 installation path to it. In our example it is C:\mingw64\bin. The bin folder is very important here. Click OK and save your environment variables. There is no need to reboot your computer. All environment variable changes are applied immediately.
- Next open a Command Prompt (cmd.exe) window, update the environment variables with the set PATH=C:\mingw64\bin;%PATH% command and navigate into the UART DFU host example folder. In our example we are using the cd C:\Users\Laird\SimplicityStudio\SDKs\gecko_sdk\app\bluetooth\example_host\bt_host_uart_dfu command.
- Now build the UART DFU host example by entering the mingw32-make command. This will take a few seconds. The bt_host_uart_dfu.exe binary can be found in a subfolder called "exe" once successfully completed.
- Use the cd exe command to navigate into the exe directory. For testing, enter bt_host_uart_dfu.exe which should print a similar usage information text as following: bt_host_uart_dfu.exe -t
| -u [-b ] [-f] [-l ] [-h]
Linux
You can either find the UART DFU host example under /opt/SiliconLabs/SimplicityStudio/v5/developer/sdks/gecko_sdk_suite/
- Make sure that the build-essential package is installed on your Linux system with the sudo apt install build-essential command. In our example we are using a Ubuntu 22.04 LTS x64 system.
- Next open a Terminal window and navigate into the UART DFU host example folder. In our example we are using the cd /root/SimplicityStudio/SDKs/gecko_sdk/app/bluetooth/example_host/bt_host_uart_dfu command.
- Now build the UART DFU host example by entering the make command. This will take a few seconds. The bt_host_uart_dfu binary can be found in a subfolder called "exe" once successfully completed.
- Use the cd exe command to navigate into the exe directory. For testing, enter ./bt_host_uart_dfu which should print a similar usage information text as following: bt_host_uart_dfu -t
| -u [-b ] [-f] [-l ] [-h]
What is Laird Connectivity's product lifecycle EOL and PCN policy?
Laird Connectivity is committed to the long-term supply of all its standard embedded wireless modules and packaged products. Laird Connectivity’s products are specifically designed to meet the needs of the industrial and medical markets, which typically require 7 – 10 years product lifecycle. Although Laird Connectivity can’t guarantee that a component used in our products will not be obsoleted and cannot be reasonably substituted, Laird Connectivity can assure customers we will continue to sell our product when we have customer demand and can obtain the necessary components to build our products.
Become a Laird Connectivity Customer and Gain Exclusive Access to Our Design Services Team
- Antenna Scans
- Antenna selection and placement
- Custom antenna design
- Worldwide EMC testing / certifications
- Embedded RF hardware / firmware design
- Cloud architecture and integration
- Mobile application development
- Product & Industrial Design
Buy Now
Distributor | Part | In Stock | Region | Buy |
---|---|---|---|---|
DigiKey | 453-00139-K1 | 25 | North America | Buy Now |
Mouser | 453-00139-K1 | 15 | North America | Buy Now |
Farnell | 453-00139-K1 | 10 | EMEA | Buy Now |
Newark | 453-00139-K1 | 10 | North America | Buy Now |
element14 APAC | 453-00139-K1 | 10 | APAC | Buy Now |
Symmetry Electronics | 453-00139-K1 | 5 | North America | Buy Now |
Avnet | 453-00139-K1 | 0 | North America | Buy Now |
Avnet | 453-00139C | 250 | North America | Buy Now |
Symmetry Electronics | 453-00139C | 250 | North America | Buy Now |
Mouser | 453-00139C | 244 | North America | Buy Now |
Farnell | 453-00139C | 0 | EMEA | Buy Now |
Farnell | 453-00139C | 0 | EMEA | Buy Now |
DigiKey | 453-00139R | 2000 | North America | Buy Now |
DigiKey | 453-00139R | 2000 | North America | Buy Now |
DigiKey | 453-00139R | 2000 | North America | Buy Now |
Avnet | 453-00139R | 1000 | North America | Buy Now |
Mouser | 453-00139R | 1000 | North America | Buy Now |
Symmetry Electronics | 453-00139R | 0 | North America | Buy Now |
DigiKey | 453-00140-K1 | 27 | North America | Buy Now |
Farnell | 453-00140-K1 | 10 | EMEA | Buy Now |
Newark | 453-00140-K1 | 10 | North America | Buy Now |
element14 APAC | 453-00140-K1 | 10 | APAC | Buy Now |
Mouser | 453-00140-K1 | 7 | North America | Buy Now |
Symmetry Electronics | 453-00140-K1 | 5 | North America | Buy Now |
Avnet | 453-00140-K1 | 0 | North America | Buy Now |
Farnell | 453-00140C | 250 | EMEA | Buy Now |
Farnell | 453-00140C | 250 | EMEA | Buy Now |
Mouser | 453-00140C | 250 | North America | Buy Now |
Newark | 453-00140C | 250 | North America | Buy Now |
Symmetry Electronics | 453-00140C | 250 | North America | Buy Now |
element14 APAC | 453-00140C | 250 | APAC | Buy Now |
element14 APAC | 453-00140C | 250 | APAC | Buy Now |
Avnet | 453-00140C | 0 | North America | Buy Now |
DigiKey | 453-00140R | 1995 | North America | Buy Now |
DigiKey | 453-00140R | 1995 | North America | Buy Now |
DigiKey | 453-00140R | 1000 | North America | Buy Now |
Mouser | 453-00140R | 985 | North America | Buy Now |
Avnet | 453-00140R | 0 | North America | Buy Now |
Symmetry Electronics | 453-00140R | 0 | North America | Buy Now |
Distributors
Distributor | Phone Number | Region | Website |
---|---|---|---|
Alpha Micro UK Only | +44 1256-851770 |
EMEA | Website |
Arrow Electronics | 1-855-326-4757 +44 2039 365486 |
APAC, North America, South America, EMEA | Website |
Avnet | 1-480-643-2000 +44 1628 512900 |
APAC, North America, South America, EMEA | Website |
Braemac Australia, New Zealand, South East Asia | +61 2 9550 6600 +64 9 477 2148 |
APAC | Website |
Cal-Chip Connect | 1-215-942-8900 |
North America | Website |
Digi-Key | 1-800-344-4539 |
North America, South America, APAC, EMEA | Website |
EBV Elektronik | EMEA | Website | |
Farlink Technology China, Hong Kong | +86 13266922199 |
APAC | Website |
Farnell | 1-800-936-198 +44 3447 11 11 22 |
EMEA | Website |
Future Electronics | 1-800-675-1619 1-514-428-8470 |
North America, South America, APAC, EMEA | Website |
Glyn | +49-6126-590-0 |
EMEA | Website |
Jetronic China, Hong Kong and Taiwan | 852-27636806 |
APAC | Website |
Laird Connectivity | 1-847-839-6925 +44 1628 858941 |
North America, South America, APAC, EMEA | Website |
M2M Germany | +49-6081-587386-0 |
EMEA | Website |
Martinsson | +46 8 7440300 |
EMEA | Website |
McCoy South East Asia | +65 6515 2988 |
APAC | Website |
Mouser | 1-800-346-6873 +44 1494 427500 |
North America, South America, APAC, EMEA | Website |
RS Components | +852-2421-9898 +44 3457-201201 |
North America, South America, APAC, EMEA | Website |
Ryoyo Japan | +81-3-3543-7711 |
APAC | Website |
Solid State Supplies UK Only | +44 (0) 1527 830800 |
EMEA | Website |
Supreme Components International India, South East Asia | +65 6848-1178 |
APAC | Website |
Symmetry Electronics | 1-866-506-8829 |
North America | Website |
Tekdis Australia and New Zealand | +61 3 8669 1210 |
APAC | Website |
Telsys | +972 3 7657666 |
EMEA | Website |