Small Bluetooth Module MK01

  • Nordic® Semiconductor nRF52832 SoC solution
  • Bluetooth 5 (2Mbps CSA#2 Advertising Extensions)
  • 512kB Flash and 64kB RAM
  • Wide supply voltage range: 1.7 V to 3.6 V
  • Full set of digital interfaces including SPI/2-wire/I²S/UART/PDM/QDEC
  • NFC-A Tag
  • Dimension: 10.0×10.0x2.0mm (with shield)
  • 22 GPIOs
  • Antenna (MK01A – Ceramic chip antenna MK01B – u.FL connector)
MK01 Smallest Bluetooth Mosule Certificate icon
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Product Instruction

MK01 series is a powerful, highly flexible, ultra low power tiny Bluetooth® 5 modules based on Nordic® Semiconductor nRF52832 SoC solution, which has a 32 bit Arm® Cortex™-M4 CPU with floating-point unit running at 64 MHz.

MK01 smallest Bluetooth module has an ultra-small size of 10mm x 10mm with 28 LGA (Land Grid Array) 0.4mm x 0.4mm pad pins providing 22 GPIOs (including 32.768 kHz crystal and reset pins) of nRF52832CIAA (WLCSP package).

MK01 series Bluetooth module has two different models — MK01A & MK01B.

MK01 Tiny Bluetooth Module Structure diagram
MK01A Smallest Bluetooth module


MK01A integrates a high-performance ceramic chip antenna.

MK01B Smallest Bluetooth module


MK01B uses a u.FL connector and requires an external antenna.

Product Specifications

Detail Description
Bluetooth version Bluetooth® Low Energy, Bluetooth® Mesh, 1M LE PHY, 2M LE PHY, Advertising Extensions, CSA #2
Security AES-128
LE connections Concurrent central, observer, peripheral, and broadcaster roles with up to twenty concurrent connections along with one observer and one broadcaster
Frequency 2360MHz - 2500Mhz
Modulations GFSK at 1 Mbps/ 2 Mbps data rates
Transmit power +4dBm maximum Configurable down to -40dBm
Receiver sensitivity -96 dBm in 1 Mbps Bluetooth® low energy mode
-89 dBm in 2 Mbps Bluetooth® low energy mode
-93 dBm in 1 Mbps ANT mode -30 dBm in whisper mode
Antenna MK01A - Ceramic chip, Peak Gain: 0.9dBi, Efficiency: -1.8dB (66%)
MK01B - Peak Gain: 3dBi, Efficiency: 85% (2.4GHz 3dBi Terminal Mount Dipole Antenna)
Current consumption
TX only (DCDC enabled, 3V) @ +4dBm / 0dBm / -4dBm / -20dBm / -40dBm 7.5mA / 5.3mA / 4.2mA / 3.2mA / 2.7mA
TX only @ +4dBm / 0dBm / -4dBm / -20dBm / -40dBm 16.6mA / 11.6mA / 9.3mA / 7.0mA / 5.9mA
RX only (DCDC enabled, 3V) @1Msps / 1Msps BLE 5.4mA
RX only @ 1Msps / 1Mbps BLE 11.7mA
RX only (DCDC enabled, 3V) @2Msps / 2Msps BLE 5.8mA
RX only @ 2Msps / 2Mbps BLE 12.9mA
System OFF mode(3V) 0.3uA
System OFF mode with full 64 kB RAM retention(3V) 0.7uA
System ON mode, no RAM retention, wake on RTC(3V) 1.9uA
Mechanical Design
Dimensions Length: 10mm±0.2mm
Width: 10mm±0.2mm
Height: 2.0mm+0.1mm/-0.15mm
Package 36 LGA (Land Grid Array) pads
PCB material FR-4
Impedance 50 Ω
CPU ARM® Cortex®-M4 32-bit processor with FPU, 64 MHz
Memory 512 kB flash / 64 kB RAM
Interfaces 3x SPI master/slave with EasyDMA
2x I2 C compatible 2-wire master/slave
22 GPIOs
7x 12bit, 200ksps ADC
3x real-time counter (RTC)
3x 4-channel pulse width modulator (PWM) unit with EasyDMA
I 2 S with EasyDMA
Digital microphone interface (PDM)
Quadrature decoder (QDEC)
Power supply 1.7V to 3.6V
Operating temperature range -40 to 85 ℃
Clock control Internal 32.768 kHz +/-250 ppm RC oscillator
Power regulator Internal LDO regulator setup

Evaluation Board

MK01-KIT evaluation board is applicable for MK01A and MK01B mini Bluetooth® module. It is a full featured evaluation board that provides a complete I/O pin and debug pin(SWD) out to headers, external 32.768 kHz crystal setup, DC/DC regulator setup, power port over USB Type-C, NFC antenna FPC connector, one RESET button, one user button and one user RGB-LED. The evaluation boards also provide the option to be powered from a CR2032 coin cell battery and have current sense hole to allow for convenient current measurements.

development board for small bluetooth module mk01


Type Title Date
Product Brief MK01_Bluetooth_Module_Datasheet.pdf 2022-12-29