UMich Moo
 A Batteryless Programmable RFID-Scale Sensor Device

The UMich Moo is a passive Computational RFID that harvests RFID reader energy from the UHF band, communicates with an RFID reader, and processes data from its onboard temperature sensor and accelerometer. Its function can be extended with its general-purpose I/Os, serial buses, and 12-bit ADC/DAC ports. The Moo provides a RFID-scale, fully programmable, batteryless sensing platform. The programs execute on an MSP430 microcontroller. The Moo 1.0 derives from the open source Intel DL WISP 4.1. Why is it called the Moo? It's the beefiest embedded platform in its class with the most code space and RAM for the least energy. The device also resembles a longhorn steer.

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UMich Moo Discussion Forum

A step-by-step tutorial on getting started with the Moo.

An Introduction to the Architecture of Moo 1.0 (PDF, PPT).

Moo tutorial slides from RFIDSec 2011(PDF).

(a) Moo with antenna removed.

(b) Moo 1.0 + USB Programmer (zoom).

(c) Moo + RFID Reader. A USB programmer is not required for wireless operation.

RFID-Scale Devices in Concrete

The source code, schematics, and design files are available on GitHub:

Video Tutorial

We presented an all-day, hands-on tutorial on how to develop programs for the Moo during the RFIDSec'11 workshop. You can't eat the tutorial lunch, but you can watch the video. We apologize for the lousy audio in the second video, but we'd be happy to answer any specific questions.


Hands-on Programming of Batteryless, RFID-Scale Computers with Sensors (Part 1 of 2).

Part 1


Hands-on Programming of Batteryless, RFID-Scale Computers with Sensors (Part 2 of 2).


Kevin Fu (Faculty)
Matthew Hicks
Miran Alhaideri
Mark Schulte
Benjamin Ransford

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This material is based upon work supported by the National Science Foundation and the Office of the National Coordinator for Health Information Technology at the Department of Health and Human Services (HHS). Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.