The high integration of both modules simplifies system design. Equipped with single-chip, multi-core SoCs (Silicon Labs' EFR32FG25 and EFR32FG23 SoCs), they offer industry-leading security, low power consumption with fast wake-up times, and an integrated power amplifier that enables the next level of secure connectivity for IoT devices.
Both SoCs are based on 32-bit ARM Cortex-M33 cores, integrating advanced security and digital signal processing capabilities. They also feature peripherals such as converters, comparators, timers, and connectivity interfaces like USB, I2C, and U(S)ART, making them easily adaptable to any type of system and application.
Wi-SUN (Wireless Smart Utility Network) is a low-power wireless communication protocol for connecting large-scale devices, designed specifically for smart city and utility network applications. Based on IEEE 802.15.4g and standardized by the Wi-SUN Alliance, it utilizes the sub-GHz frequency band to create robust and scalable mesh networks, enabling the efficient connection and monitoring of numerous devices over long distances. Both modules are Wi-SUN Alliance certified for the PHY layer of the FAN 1.1 profile.

WM-Bus (Wireless Meter-Bus) is a wireless communication protocol specifically designed for the remote reading of meters, such as those for gas, water, electricity, and heating. It enables wireless data transmission, facilitating data collection with low power consumption. This standard ensures interoperability between different devices and improves the efficiency of managing and monitoring metering networks. M-Bus is optimized for operation in industrial and utility environments, guaranteeing robust and reliable data transmission even under harsh conditions.

Both modules are ideal for long-range, low-power transmissions, capable of transmitting over long distances with minimal data loss in dense urban canyon environments. The RFM25A12 supports up to 16 dBm of transmit power, while the RFM23A020 supports up to 20 dBm. Both modules also feature high sensitivity, optimizing signal reception and resulting in greater range and extremely robust communication links. They are an ideal solution for sub-GHz Internet of Things (IoT) applications, such as smart homes, security, lighting, building automation, and metering.

RFM25A12 specifications:
• Core: ARM Cortex-M33
• Flash memory: 1152 KB
• RAM: 256 KB
• Timers (16 bits): 6
• Maximum output power: 16 dBm
• Frequencies: 868 MHz, 915 MHz
• Modulation: OFDM, (G)FSK, (G)MSK, OQPSK
• Security: AES-128, AES-256, ECC, SHA-1, SHA-2
• Power supply: 1.8 V–3.8 V.
• Receive sensitivity: –125.8 dBm @ 915 MHz, 4.8 kbps OQPSK.
• Transmit current: 58.6 mA @ 13 dBm, 923.6 MHz; 76.6 mA @ 16 dBm, 915 MHz.
• Receive current: 6.3 mA @ 924 MHz.
• Sleep current: 4.6 µA.
• Supported protocol: Wi-SUN.
RFM23A020 specifications:
• Core: ARM Cortex-M33.
• Flash memory: 256 KB.
• RAM: 32 KB.
• Timers (16 bits): 4
• Maximum output power: 20 dBm.
• Frequencies: 868 MHz, 915 MHz.
• Modulation: OOK, (G)FSK, (G)MSK, OQPSK, OOK.
• Security: AES-128, AES-256, ECC, SHA-1, SHA-2.
• Power supply: 1.8 V–3.8 V.
• Receive sensitivity: –125.8 dBm @ 915 MHz, 4.8 kbps OQPSK.
• Transmit current: 85.5 mA @ 20 dBm, 915 MHz; 25 mA @ 14 dBm, 915 MHz.
• Receive current: 3.7 mA.
• Sleep current: 1.2 µA @ 868 MHz.
• Supported protocols: Wi-SUN, WM-BUS, Sidewalk, Connect.
Applications:
• Smart meters and meters.
• Home and building automation and security.
• Industrial automation.
• Street lighting.
• Wireless remote control.
For any technical or commercial inquiries, please contact Mecter SL, an authorized HOPERF distributor.