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

MiWi™ Protocol

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

The MiWi stack offers a significantly smaller foot-print 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.

MIWI Dev Env Block thumb

Microchip’s MiWi Mesh Stack is now available for Atmel Studio 7 the Integrated Development Platform (IDP) for developing and debugging all AVR® and SAM microcontroller applications. The Atmel Studio 7 IDP gives you a seamless and easy-to-use environment to write, build and debug your applications written in C/C++ or assembly code. 

Atmel Studio 7 is available at: http://www.microchip.com/avr-support/atmel-studio-7 and the MiWi Mesh code is part of the latest Advanced Software Framework (ASF) release for Studio, available at: http://www.microchip.com/avr-support/advanced-software-framework-(asf).

  • SAM R21 – Cortex® M0+ with an 802.15.4 2.4 GHz Transceiver
  • SAM R30 – Cortex M0+ with an 802.15.4 Sub-Ghz Transceiver

Single-chip Solutions that Support the Latest MiWi Protocol Release in Studio ASF

ZigBee®, MiWi™ZigBee®, MiWi™
ProductDescriptionProtocol SupportMicrochipDIRECT
ATSAMR30E18A Single-chip ARM® Cortex®-M0+ based 32-bit Microcontroller with Low Power Sub-GHz Transceiver for IEEE 802.15.4 Applications with 256K Flash and 32KB RAM in a 5x5 QFN32 packageMiWi™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 256K Flash and 32KB RAM in a 7x7 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 64KB 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 128KB 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 256KB 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 256KB(512KB) 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 64KB 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 128KB 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 Power 2.4 GHz Transceiver for IEEE 802.15.4 and ZigBee Applications with 256KB Flash and 28 I/O pins in a QFN48 package.ZigBee®, MiWi™Buy Now

Transceiver Modules that support the MiWi Protocol

ProductDescriptionProtocol SupportMicrochipDIRECT
MRF24J40MA_thumb
MRF24J40MA
2.4 GHz IEEE 802.15.4 Radio Transceiver Module with PCB antennaZigBee®, MiWi™Buy Now
MRF24J40MB_thumb
MRF24J40MD
2.4 GHz IEEE 802.15.4 Radio Transceiver Module with PCB antenna and PA/LNAZigBee®, MiWi™Buy Now
microchiptechnologyinc_29170950430
MRF24J40ME
2.4 GHz IEEE 802.15.4 Radio Transceiver Module with U.FL Connector and PA/LNAZigBee®, MiWi™Buy Now
14101-MRF89XAM8A-M9A
MMRF89XAM8A
Sub-GHz 868 MHz Radio Transceiver ModuleMiWi™Buy Now
14101-MRF89XAM8A-M9A
MRF89XAM9A
Sub-GHz 915 MHz Radio Transceiver ModuleMiWi™Buy Now

Transceivers that support the MiWi Protocol

ProductDescriptionProtocol SupportMicrochipDIRECT
14102-MRF89XA
MRF89XA
Sub-GHz Radio Transceiver (supports 863-870, 902-928, and 950-960 MHz)MiWi™Buy Now
14102-MRF24J40
MRF24J40
2.4 GHz IEEE 802.15.4 Radio TransceiverZigBee®, MiWi™Buy Now