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MiWi™ Protocol

Low-Cost Embedded Connectivity for Wireless 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® protocol stack. This enables operation in microcontrollers with smaller memory/lower cost. A typical end node requires only 20 KB of code space.

Working With MiWi Products

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:

MiWi Proprietary Mesh Network Topology

Products Supporting the MiWi Protocol

Product Description Protocol Support
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™ Protocol
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 Protocol
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 Protocol
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 Protocol
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 Protocol
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 Protocol
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 Protocol
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 Protocol
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 Protocol
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 Protocol