Carey Payette
Published © GPL3+

Long Range UHF RFID Item Tracking System

For makerspaces to keep track of tools and other items. Tag items with inexpensive RFID tags and track their physical locations.

IntermediateFull instructions provided52,140
Long Range UHF RFID Item Tracking System

Things used in this project

Hardware components

Raspberry Pi 2 Model B
Raspberry Pi 2 Model B
×1
Cottonwood: TTL UART Long Range UHF RFID reader (ISO18000-6C EPC G2)
×1
8dbi Mid-Range UHF RFID Antenna
For best results, a commercial grade long range UHF RFID circular antenna is recommended
×1
Male N-J to MMCX-J Interface Cable
×1
CP2102 USB 2.0 to UART TTL 6PIN Module Serial Converter
×1
5VDC 2A Power Supply Center-positive 5.5x2.1mm barrel connector
The Cottonwood board requires it's own power supply
×1

Software apps and online services

Microsoft Azure
Microsoft Azure
Web management interface and Web API service end-point hosting, database hosting
Windows 10 IoT Core
Microsoft Windows 10 IoT Core

Story

Read more

Schematics

USB to UART TTL Wiring

USB to UART TTL Wiring
Wp 20150916 20 59 05 rich

Cottonwood Wiring

- CP2102 GND to Cottonwood GND
- CP2102 TX to Cottonwood RX
- CP2102 RX to Cottonwood TX
Wp 20150916 21 03 12 rich

Code

trackerwebdb Database Script

SQL
Create a SQL Azure database named trackerwebdb and run this script
USE [trackerwebdb]
GO
/****** Object:  Table [dbo].[Monitor]    Script Date: 9/17/2015 4:07:52 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[Monitor](
	[Id] [int] IDENTITY(1,1) NOT NULL,
	[IpAddress] [varchar](23) NULL,
	[FriendlyName] [varchar](50) NULL,
	[Location] [varchar](255) NULL,
	[Status] [int] NULL,
	[LastPing] [datetime] NULL,
PRIMARY KEY CLUSTERED 
(
	[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
)

GO
SET ANSI_PADDING OFF
GO
/****** Object:  Table [dbo].[Tag]    Script Date: 9/17/2015 4:07:54 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[Tag](
	[Id] [int] IDENTITY(1,1) NOT NULL,
	[TagId] [varchar](35) NULL,
	[FriendlyName] [varchar](50) NULL,
	[Description] [varchar](500) NULL,
	[BlobId] [varchar](300) NULL,
	[Status] [int] NULL,
PRIMARY KEY CLUSTERED 
(
	[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
)

GO
SET ANSI_PADDING OFF
GO
/****** Object:  Table [dbo].[Tracking]    Script Date: 9/17/2015 4:07:54 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[Tracking](
	[Id] [int] IDENTITY(1,1) NOT NULL,
	[TagId] [int] NULL,
	[MonitorId] [int] NULL,
	[Reading] [datetime] NULL,
PRIMARY KEY CLUSTERED 
(
	[Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON)
)

GO
/****** Object:  View [dbo].[InventoryView]    Script Date: 9/17/2015 4:07:54 PM ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE VIEW [dbo].[InventoryView]
	AS 
	select t.id as TagId,
	   t.friendlyname as TagFriendlyName,
	   (select max(tj.reading) from tracking tj where tj.tagid=t.id) as Reading,
	   CASE WHEN (select max(tk.reading) from tracking tk where tk.tagid=t.id) IS NOT NULL THEN
			(select m.location from monitor m 
					inner join tracking tk on m.id=tk.monitorid
			where tk.tagid=t.id and tk.reading=(select max(reading) from tracking where tagid=t.id))
	   ELSE
		'N/A'
	   END as Location
	from tag t
GO
ALTER TABLE [dbo].[Tracking]  WITH CHECK ADD  CONSTRAINT [FK_Tracking_Monitor] FOREIGN KEY([MonitorId])
REFERENCES [dbo].[Monitor] ([Id])
GO
ALTER TABLE [dbo].[Tracking] CHECK CONSTRAINT [FK_Tracking_Monitor]
GO
ALTER TABLE [dbo].[Tracking]  WITH CHECK ADD  CONSTRAINT [FK_Tracking_Tag] FOREIGN KEY([TagId])
REFERENCES [dbo].[Tag] ([Id])
GO
ALTER TABLE [dbo].[Tracking] CHECK CONSTRAINT [FK_Tracking_Tag]
GO

Headed Cottonwood Tester Application

A headed universal application that allows you to manually communicate with the Cottonwood Long Range UHF RFID board

Web interface for monitor and device management, web api reading endpoint

Web interface that allows the user to register monitors and tags. Also provides Web API end point for readings from the Monitors.

RFID Scanner - Background Application that reads UHF RFID tags

Background Universal Application that reads available UHF RFID tags from the Cottonwood board and sends them to a cloud service. Also contains the class library of the Cottonwood class.

Credits

Carey Payette

Carey Payette

11 projects • 114 followers
Sr. Software Engineer at Independent
Contact

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