We detect you are using an unsupported browser. For the best experience, please visit the site using Chrome, Firefox, Safari, or Edge. X

Low-Cost Embedded Wireless Connectivity for Commercial and Smart Home Networks

Developed to enable low-cost, commercial and smart home networks, the MiWi™ protocol is used in applications such HVAC systems and alarm sensors where reliable self-healing mesh networking is needed. The MiWi protocol supports operation in the IEEE 802.15.4 radio PHY in the sub-GHz and 2.4 GHz ISM bands.

The MiWi protocol stack offers a significantly smaller footprint relative to the open standard-based Zigbee® compliant protocol stack. This enables operation in microcontrollers with smaller memory/lower cost. A typical end node requires only 20 KB of code space.

Our MiWi Mesh Stack is available for Microchip Studio, the Integrated Development Platform (IDP) for developing and debugging all AVR® and SAM microcontroller applications. Microchip Studio gives you a seamless and easy-to-use environment to write, build and debug your applications written in C/C++ or assembly code. The MiWi Mesh code is part of the Advanced Software Framework (ASF). Here are some links to other helpful resources:

Single-Chip Solutions that Support the MiWi Protocol in the ASF


Product Description Protocol Support Purchase from Microchip
ATSAMR30M18 Compact shielded 12.7 mm × 11.0 mm module based on the sub-GHz, 802.15.4 ATSAMR30E18A SiP with two regulatory-certified antenna reference designs MiWi

Buy Now

ATSAMR30E18A Single-chip Arm® Cortex®-M0+ based 32-bit microcontroller with low-power sub-GHz transceiver for IEEE® 802.15.4 applications with 256 KB Flash and 32 KB RAM in a 5 × 5 QFN32 package MiWi

Buy Now

ATSAMR30G18A Single-chip Arm Cortex-M0+ based 32-bit microcontroller with low-power sub-GHz transceiver for IEEE 802.15.4 applications with 256 KB Flash and 32 KB RAM in a 7 × 7 QFN48 package. MiWi

Buy Now

ATSAMR21E16A Single-chip Arm Cortex-M0+ based 32-bit microcontroller with low-power 2.4 GHz transceiver for IEEE 802.15.4 and Zigbee® applications with 64 KB Flash and 16 I/O pins in a QFN32 package. Zigbee, MiWi

Buy Now

ATSAMR21E17A Single-chip Arm Cortex-M0+ based 32-bit microcontroller with low-power 2.4 GHz transceiver for IEEE 802.15.4 and Zigbee applications with 128 KB Flash and 16 I/O pins in a QFN32 package. Zigbee, MiWi

Buy Now

ATSAMR21E18A Single-chip Arm Cortex-M0+ based 32-bit microcontroller with low-power 2.4 GHz transceiver for IEEE 802.15.4 and Zigbee applications with 256 KB Flash and 16 I/O pins in a QFN32 package. Zigbee, MiWi

Buy Now

ATSAMR21E19A Single-chip Arm Cortex-M0+ based 32-bit microcontroller with low-power 2.4 GHz transceiver for IEEE 802.15.4 and Zigbee applications with 256 KB (512 KB) Flash and 16 I/O pins in a QFN32 package. Zigbee, MiWi

Buy Now

ATSAMR21G16A Single-chip Arm Cortex-M0+ based 32-bit microcontroller with low-power 2.4 GHz transceiver for IEEE 802.15.4 and Zigbee applications with 64 KB Flash and 28 I/O pins in a QFN48 package. Zigbee, MiWi

Buy Now

ATSAMR21G17A Single-chip Arm Cortex-M0+ based 32-bit microcontroller with low-power 2.4 GHz transceiver for IEEE 802.15.4 and Zigbee applications with 128 KB Flash and 28 I/O pins in a QFN48 package. Zigbee, MiWi

Buy Now

ATSAMR21G18A Single-chip Arm Cortex-M0+ based 32-bit microcontroller with low-P\power 2.4 GHz transceiver for IEEE 802.15.4 and Zigbee applications with 256 KB Flash and 28 I/O pins in a QFN48 package. Zigbee, MiWi

Buy Now

Transceiver Modules that Support the MiWi Protocol


Transceivers that Support the MiWi Protocol


MRF89XA

Protocol Support: MiWi™

Sub-GHz radio transceiver (supports 863–870, 902–928 and 950–960 MHz)

MRF24J40

Protocol Support: Zigbee®, MiWi

2.4 GHz IEEE 802.15.4 radio transceiver

Introducing Microchip's WFI32 Wi-Fi 32-bit MCU Module

This video introduces Microchip’s first Trust&GO Wi-Fi® 32-bit MCU, which has market leading MCU functionalities and is pre-provisioned for cloud platforms.