Seeed Studio XIAO nRF54LM20A Sense is the latest ultra-low-power addition to the XIAO family, built around Nordic Semiconductor's nRF54LM20A SoC and paired with the nPM1300 PMIC for integrated battery charging and power regulation. Designed for always-on IoT and edge sensing applications, it supports BLE 6.0, Matter, Thread, Zigbee, and proprietary 2.4 GHz connectivity (up to 4 Mbps), with a deep sleep current as low as 4.76 µA and Ship Mode at 0.33 µA. The board offers 28 GPIOs, USB Type-C, onboard battery charging, NFC, an IPEX4 antenna connector, 6-axis IMU and digital microphone for production-ready wireless designs.

Powerful SoC with Advanced Connectivity & Security

Seeed Studio XIAO nRF54LM20A Sense is a compact, ultra-low-power wireless development board powered by Nordic Semiconductor’s nRF54LM20A SoC. It features a 128 MHz Arm Cortex-M33 processor, 512 KB RAM, 2 MB on-chip NVM, a 128 MHz RISC-V coprocessor, multiprotocol 2.4 GHz wireless connectivity, onboard IMU, digital microphone, 8MB external flash, IPEX antenna connector, and Nordic nPM1300 PMIC for efficient power management.

With support for Bluetooth LE, Bluetooth Channel Sounding, Bluetooth Mesh, Thread, Zigbee, Matter, and proprietary 2.4 GHz protocols up to 4 Mbps, this board is built for next-generation connected products. The onboard motion and audio sensors make it ideal for wearables, smart sensing, TinyML, gesture recognition, voice-triggered devices, and battery-powered IoT applications.

Comprehensive security features include secure boot, secure firmware updates, secure storage, TrustZone-enabled trusted execution environment, cryptographic acceleration with side-channel protection, and tamper detection, ensuring robust protection for IoT deployments.

Ultra-Low Power Efficiency

Built on Nordic nRF54LM20A and nPM1300 PMIC, XIAO nRF54LM20A Sense achieves a measured deep sleep current of only 4.76 µA under BAT power. Combined with the nPM1300 PMIC and its 0.33 µA Ship Mode BAT current, in active wireless operation, it records an average current of 3.87 mA with a 3.7 V simulated battery input and TX power set to +8 dBm, the board is ideal for long-life battery-powered sensing applications, wearables, and always-on IoT devices.

Streamlined Development Experience

Full support for Nordic nRF Connect SDK and PlatformIO (Zephyr) enables efficient embedded development workflows. Arduino IDE support available through nrf54-arduino-core.

Specifications:

• Product Name : Seeed Studio XIAO nRF54LM20A : Seeed Studio XIAO nRF54LM20A Sense
• Chipset : nRF54LM20A | nRF54LM20B Datasheet
• Processor : Arm® Cortex®-M33 128 MHz
• RISC-V 128 MHz Coprocessor
• RAM : 512KB
• Flash : 2 MB Non-volatile Memory (NVM)
• External Flash : 8 MB onboard external flash
• PMIC / Battery : nPM1300 PMIC for power regulation and battery charging
• Interface : 28x GPIO Pin
• 9x Analog Pin
• 1x I2C
• 1x UART
• 1x SPI
• 1x NFC
• 1 x SHPHLD
• Onboard : 1x User LED (R\G\B 3 Color)
• 1x Charge LED (Battery Charging Indicator)
• 1x Reset Button
• 1x User Button
• 1x IPEX4 Connector (for external antenna)
• / : 1x 6-Axis IMU
• 1x PDM Microphone
• Wireless Connectivity : Bluetooth LE 6.0（include Channel Sounding）
• Bluetooth Mesh
• NFC
• Thread
• Zigbee
• Matter
• Amazon Sidewalk
• Proprietary 2.4 GHz protocols
• Power Input : Type-C : 5V
• Battery : 3.7V
• Low Power Mode(3.7V@2A) : / : Light-Sleep: ~9.96µA
• Deep-Sleep(System OFF): ~4.76µA
• Deep-Sleep(System OFF、GRTC wake-up): ~4.92µA
• Ship-Mode: 0.33µA
• Software Compatibility : Nordic nRF Connect SDK
• PlatformIO
• Zephyr RTOS
• Working Temperature : -20°C to 70°C
• Dimensions : 21 x 17.8mm
• Various Versions : XIAO nRF54LM20A Pre-soldered : XIAO nRF54LM20A Sense Pre-soldered

Hardware Overview:

Application:

• Wearable motion and activity tracking
• Battery-powered Bluetooth LE sensor nodes
• Smart home devices with Matter, Thread, Zigbee, or Bluetooth Mesh
• TinyML and edge AI sensing
• Audio event detection and voice-triggered devices

Package Includes:

• 1 x Seeed Studio XIAO nRF54LM20A Sense - 100018440/100066112