433MHz/868MHz/915MHz  Wireless Transceiver Module with Silicon Labs EFR32FG23 SoC 

DL-EFG23-B is a high-performance Sub-1GHz RF module developed by DreamLNK based on the EFR32FG23 wireless SoC (with an integrated ARM Cortex-M33 processor) of Silicon Labs. This chip integrates an advanced RF transceiver, a low-power management unit, and a rich set of peripheral interfaces. It supports multiple frequency bands such as 433/868/915MHz, and features high output power (up to +20 dBm) and high receiving sensitivity (up to -123 dBm), offering excellent RF performance and strong anti-interference ability.

Thi DL-EFG23-B RF module combines an integrated RF controller (Cortex®-M33) with a powerful Arm® Cortex®-M33 processor. The main clock frequency can reach up to 78MHz, with 256K of FLASH and 32K of RAM. With its fully functional built-in AT Commands, the module support any serial baud rate from 2400 to 921600bps, which can improve communication efficiency. Through the AT commands, users can easily configure wireless network parmeters. Moreover, the software internally supports obtaining RSSI (Received Signal Strength Indication) and implementing common wireless communication topologies such as point-to-point and point-to-multipoint, greatly simplifying the application development process.

Though a multi-functional firmware is pre-installed at the factory, you can also conduct secondary development based on Silicon Labs development environment if needed.

(Note: these RF modules will be sold base on our standard firmware. For specific requirements, please feel free to contact us.)

Application Scenarios | Empowering Long-distance, Low-power, High-speed Applications

Power & Energy (Smart Grid Monitoring)

Real-time monitoring of substations, cable tunnel equipment, fault warning, intelligent inspection, power generation efficiency optimization, etc.

Industrial Manufacturing

Industrial Internet of Things (IIoT) 

Equipment condition monitoring, predictive maintenance, and production process optimization through sensors and wireless connectivity.

Smart City  

Smart street lamps, parking lots, manhole covers  

Ultra-long coverage capability reduces gateway deployment, upgrading urban infrastructure to “automatic management.”

Advanced Metering

High-End Smart Meters 

Smart water meters, electricity meters, gas meters, heat meters, industrial flow meters, etc. – stable and power-efficient.

Industrial Automation

Industrial Data Acquisition Systems

Completely avoids congestion; wide-temperature design and high reliability meet the demanding conditions of industrial sites.

Intelligent Mining

Unmanned Mining / Intelligent Mining

Remote control of mining equipment, unmanned intelligent inspection, ensuring safe production.

New Energy 

Remote Operation & Maintenance of Energy Equipment

Remote data monitoring and fault diagnosis for equipment such as wind farms and oil & gas fields.

Smart Healthcare

Wireless Medical Devices

Remote patient monitoring, medical asset tracking, pharmaceutical cold chain monitoring, etc.

Key Features 

Hardware Features:

● Support a wide power supply voltage range :1.7~3.8V;

● Sleep current: <1uA (EM4 mode), suitable for battery-powered remote sensors and network nodes.

● High - efficiency receiving performance (RX current: 8mA);

● TX transmission power: up to +20dbm;

● Excellent receiver sensitivity: -123dBm @ 2.4kbps; -110dBm @ 50kbps.

● Accurate signal strength indication and channel evaluation

● AES-128 or AES-256 hardware encryption support

Software Features:

● Use AT commands for configuration and saving, facilitating development and debugging;

● Support transparent transmission mode for data transfer;

● Support control of data flow in transparent transmission mode;

● Support any serial port baud rate from 2400 - 921600bps;

● Support RSSI acquisition at any time for channel idle detection;

● Support channel switching to avoid co-frequency interference;

● Can implement fixed - point transmission, broadcast and monitoring transmission modes

Download Center

Data Sheet of DL-EFG23-B Wireless Module V1.3 

Brief Introduction of DL-EFG23-B SoC Wireless Module 

Key Advantages: 

The DL-EFG23-B is a high-performance Sub-GHz RF module designed for Industrial IoT, smart metering, and all-scenario wireless communication. It integrates ultra-long range communication, ultra-low power consumption, industrial-grade reliability, and financial-grade security to help customers accelerate product deployment.

1).  Excellent RF Performance — Long Range · Strong Penetration · Low Latency

Sub-GHz frequency band effectively avoids congestion and interference from the 2.4 GHz band (Wi-Fi/Bluetooth), with strong diffraction capability for stable communication in complex environments.

Built-in CRC checking and AFC automatic frequency offset correction, supporting RSSI channel detection and dynamic channel switching to ensure communication quality.

2).  Ultra-Low Power Consumption — Up to 10-Year Battery Life

No external power supply required, ideal for battery-powered wireless sensors, smart meters, and other long-term unattended applications.

Ultra-fast wake-up mechanism balances low power consumption with real-time responsiveness.

3).  Industrial-Grade Reliability & Wide Voltage Range

Easily handles extreme industrial environments including severe cold, high heat, and strong electromagnetic interference.

Wide voltage input compatible with various power supply options such as coin cells and lithium batteries.

4).  Financial-Grade Security — PSA Level 3 Certified

Awarded PSA Certified Level 3 hardware security certification, fully compliant with IEC 62443 industrial network security standards.

Hardware Cryptographic Acceleration Engine: Supports AES128/192/256, ChaCha20-Poly1305, SHA-1/256/384/512, ECDSA/ECDH (P-192 ~ P-521), Ed25519, Curve25519, J-PAKE, PBKDF2.

Complete Security Components: Arm® TrustZone®, Secure Boot (Root of Trust Secure Loader), Secure Debug Lock, Physical Tamper Detection, DPA Countermeasures, PUF-based Secure Key Management, True Random Number Generator (TRNG), Security Attestation.

Transparent Transmission Encryption: Plaintext input via serial port → ciphertext output over the air — no user programming required, out-of-the-box.

5).  Flexible & Easy to Use — Zero-Programming Deployment + Deep Customization

Secure Boot firmware authentication ensures only digitally signed and authorized trusted firmware can be loaded and executed.

Supports mainstream protocols such as Wi-SUN FAN / WM-BUS / Wirepas Mesh, easily building city-scale networks covering millions of nodes.

Technical Parameter

Pins Definition:

Product size:

DL-EFG23-B Core Value: Sub-GHz long-range penetration + µA-level power consumption + industrial wide-temp & wide-voltage + PSA L3 security certification + AT-command zero-barrier development — delivering a "plug-and-play, long-lasting, highly secure, wide-coverage" all-in-one wireless module solution for Industrial IoT and smart metering applications.

DreamLNK is a high-tech enterprise specializing in ISM band micropower wireless communication technology, providing different kinds of wireless modules and one-stop IoT solutions, including 433/868/915MHz wireless modules, 2.4G wireless Modules, FSK Transceiver Modules, LoRa Modules, Antennas, Remote Controls, and customized wireless RF solutions. Welcome to inquire!