The VOL KW41Z module is an ultra-compact, low power, high sensitivity module that supports Zigbee®, Thread with IEEE 802.15.4 and Bluetooth Low Energy (BLE 4.2) RF connectivity. Built with a 32-bit ARM® Cortex® M0+ CPU operating up to 48 MHz, and an integrated chip antenna, VOL KW41Z provides OEMs with a dual RF solution for dynamic application needs, with minimal development, reduced risk, and faster time-to-market. VOL KW41Z is enriched with mikroBUS™ compatibility to connect to third-party products with a single click. It is an ideal solution for true single-chip designs that require concurrent communication on Zigbee®, Bluetooth Low Energy 4.2 and 802.15.4 based networks such as Thread, at reduced BOM cost. This multi-mode functionality as Thread module and Bluetooth module allows direct integration into thread mesh networks and direct communication with mobile devices via BLE.
- Powerful 32-bit ARM® Cortex®-M0+ operating up to 48 MHz
- Zigbee®, Thread (802.15.4) and BLE 4.2 support
- Ultra-compact design (19 mm x 11.5 mm)
- FCC, IC, CE – RED certified
- MikroBUS™ compatible option
- Configurable 9 MCU Low Power Modes
- Configurable max.output power: +3.5dbm
- Hardware encryption support for AES 128-bit
- Home and Building Control
- Smart Lighting
- Energy and Utility
- Consumer Electronics
- Healthcare
- Automotive
- Wearables
- Asset Tracking
CPU | 32bit ARM® Cortex®-M0+ operating up to 48 MHz |
Memory | 64KB of SRAM 512KB of Flash |
RF Connectivity | Zigbee® Thread (IEEE 802.15.4) Bluetooth Low Energy (BLE 4.2) |
Compatibility | MikroBUS™ compatible |
Antenna | On-board chip antenna (chip antenna gain - 2dbi) |
Dimensions | LxWxH – 19 mm x 11.5 mm x 2.8mm (KW41Z module) LxWxH – 25.4 mm x 28.6 mm x 12.8mm (With MikroBUS™ Interface Board) |
Operating Temperature | -40 °C to +85 °C |
Power | 9 MCU Low-Power Modes Low Power Mode (VLLS0) Current: ˜180 mA |
Tx only @ 0dbm, Bypass mode | 15mA |
Rx only, Bypass mode | 17mA |
Normal Mode CPU @ 48MHz @ 3.0V, DC-DC enabled | 5mA |
Supply Voltage | 0.9V – 4.2V |
Receiver Sensitivity (BLE) | -96dbm |
Receiver Sensitivity (802.15.4) | -100dbm |
Programmable Transmitter Output Power | +3.5dbm |
Bluetooth Low Energy 4.2 Modulation | GFSK |
IEEE Standard 802.15.4 | QPSK |
2x SPI | Two independent SPI channel with Master and Slave mode, double buffered transmit and receive data |
1x UART | Single channel full duplex with hardware flow control RTS/CTS and programmable data format |
2x I2C | Two I2C channel, compatible with SMBus spec, up to 400KHz operation |
ADC | 16-bit, conversation at 500Ksps, input clock selection |
DAC | 12-bit, 1uS at high-speed and 2uS at low-speed, guaranteed 6-sigma monotonicity |
3x PWM | Three PWM channel (One with 4 channel and two with 2 channel), programmable prescaler |
Timers | Single channel 16-bit low power timer |
TSI | Supports up to 16 external electrodes, capability to wake MCU from low power modes |
PIT | Up to two interrupt timers with 32-bit resolution |
CMP | Up to eight selectable comparator inputs |
RoHS | Compliant |
FCC, FCC ID | Yes |
CE-RED | Yes |
IC, IC ID | Yes |
512KB of Flash
Bluetooth Low Energy (BLE 4.2)
LxWxH – 25.4 mm x 28.6 mm x 12.8mm (With MikroBUS™ Interface Board)

The Modular Edge Node Platform development board (MENP) is an advanced multi-module compatible end node that supports various hardware modules through mikroBUS™ connectors. VOL KW41Z module is mounted on this board to utilize the complete range of features and functions of the module.
The development board has two mikroBUS™ compatible sockets which provide SPI, I2C, UART and GPIO interfaces. This ready-to-use development board can be used to build Thread/BLE based end device prototypes with faster time to market.
For further information on this development board, read more.
VOL KW41Z Product Brief
VOL KW41Z Datasheet
VOL KW41Z CE-RED
VOL KW41Z FCC
VOL KW41Z IC