RF-TO-USB2-RD Silicon Laboratories Inc, RF-TO-USB2-RD Datasheet

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RF-TO-USB2-RD

Manufacturer Part Number
RF-TO-USB2-RD
Description
RF TO USB EVAL REF DESIGN
Manufacturer
Silicon Laboratories Inc
Series
-r
Type
Sensor Demor
Datasheet

Specifications of RF-TO-USB2-RD

Frequency
915MHz
Lead Free Status / Rohs Status
Contains lead / RoHS non-compliant
For Use With/related Products
-
Other names
336-2139
RF
1. Kit Contents
The RF to USB Reference Design contains the following items:
2. Introduction
This kit is intended to serve both as a simple, low-power analog data collection example and as a development
platform for wireless sensing projects.
The demonstration uses one or more node boards to communicate with a USB dongle, which acts as a network
coordinator and data collector. The system measures temperature and voltage on each dongle board and displays
them on a PC window.
The development example uses two node boards to communicate to each other. A simple code example is
provided as a jump-start for custom projects. Peripheral or low power functionality can be added to this example by
referencing an available library of code examples.
This system is intended to be a simple starting point. For more advanced radio or peripheral evaluation, a full
Si1000DK development kit is recommended.
This kit, RF to USB Reference Design 2, replaces the original RF to USB Reference Design.
3. Quick Start
This section guides you through the setup of a data collection example using two node boards to wirelessly
transmit analog measurements to a PC-based user interface.
1. Install the RF to USB Reference Design software and firmware examples from your installer package, either
2. Plug the dongle into an available USB port as shown in Figure 1.
Rev. 0.2 5/11
RF to USB Node Boards (2)
AAA batteries (2)
RF to USB Dongle (1)
Tool Stick Programming Adapter (1)
Retractable USB cord (1)
downloaded from
TO
USB R
www.silabs.com/RFtoUSB
EFERENCE
Figure 1. RF USB Dongle Connect
Copyright © 2011 by Silicon Laboratories
or from a CD.
D
ESIGN
R F - t o - U S B - R D 2
2 U
SER
S
G
UIDE
RF-to-USB-RD2

Related parts for RF-TO-USB2-RD

RF-TO-USB2-RD Summary of contents

Page 1

... This section guides you through the setup of a data collection example using two node boards to wirelessly transmit analog measurements to a PC-based user interface. 1. Install the RF to USB Reference Design software and firmware examples from your installer package, either downloaded from www.silabs.com/RFtoUSB 2 ...

Page 2

... Note “old firmware” warning is received, click “yes” to update as shown in Figure 3. 5. Insert the battery into one of the node boards as shown in Figure 4. 2 Figure 2. Click Connect Figure 3. Old Firmware Warning - + - + - AAA Figure 4. RF USB Node Battery In Rev. 0.2   +   ...

Page 3

... Associate the board with the dongle and PC application, and press the button as shown in Figure 6. a.Press the button. b.Note that the first board is assigned as Node 1 (Figure 7). Figure 7. First Node Assigned as Node 1 Figure 5. RF USB Node Power On Figure 6. RF USB Node Button Press Rev. 0.2 RF-to-USB-RD2   ...

Page 4

... Vary the ADC input by turning the potentiometer as shown in Figure 8. Figure 8. RF USB Node Potentiometer 4. Touch the Si1014 package to warm the internal temperature sensor as shown in Figure 9. Figure 9. RF USB Node Temperature Changes Note: The node board transmits periodically for a fixed time, then goes to sleep. Press the button again to restart. 4 ...

Page 5

... RF to USB Data Collection Demo The RF to USB kit features a wireless data sensor demonstration. This demo uses one or more node boards to transmit analog data (temperature and a potentiometer value USB dongle at a fixed frequency of 919.84 MHz. Refer to "3. Quick Start" on page 1 for installation and basic use. Detailed options follow. ...

Page 6

... This displays a normalized ADC reading from the node. The voltage measured by the ADC is set by a potentiometer on the board. Note: The second generation RF to USB Reference Design is not backward-compatible with the earlier version because the over-the-air protocol has changed. First-generation node boards are identified by part number “4431-DASNF912 HB”, whereas second-generation node boards are identified by part number “ ...

Page 7

... Developing an Application with the RF to USB Kit The RF to USB Kit is intended demonstration and starting point for low-power/single-cell wireless sensor applications. This section details the development features of the kit. 5.1. Firmware Development This kit includes multiple nodes, a programming adapter, and firmware examples to help start your development. ...

Page 8

... Building and Downloading the Project 1. Open the Silabs IDE and load the project: C:\Silabs\MCU\RF_to_USB_RD\Firmware\PreProcessorPHY_TxRx\ppPhyTxRx.wsp 2. Set the power switch on one of the two node boards to “TS 3.3V” (ToolStick 3 Plug the node board in to the ToolStick Programming Adapter, and connect the adapter to your PC's USB port as shown in Figure 12 ...

Page 9

... Verify successful build and download as shown in Figure 15. Figure 15. Verify Successful Build and Download 7. Disconnect the IDE as shown in Figure 16. Figure 16. Disconnect IDE Rev. 0.2 RF-to-USB-RD2   9 ...

Page 10

... RF-to-USB-RD2 8. Remove the Node board from the ToolStick Debug Adapter as shown in Figure 17. Figure 17. Remove Node Board from Toolstick Adapter 9. Repeat for the second Node board. 10 Rev. 0.2 ...

Page 11

... Figure 18. Insert Battery in Node Board 2. Slide the power switch to BATT. Figure 19. Slide Power Switch to BATT 3. Press the button and observe the LEDs change on the other node board with each press. Figure 20. LEDs on Other Node Board Change with Press RF-to-USB-RD2 - + - + - ...

Page 12

... RF-to-USB-RD2 5.4. Understanding the Project Examine the user code. One file, mainTxRx.c, contains the user code. Other files contain the code modules from the ppPhy and do not need to be modified. The first items called in main.c set the Si1014's DC-DC converter. In this example, the DC-DC converter is used to step a single-cell battery voltage ...

Page 13

... MCU core in low-power, waking up on keypress real-time clock.  Making a measurement with the ADC: See code examples under C:\SiLabs\MCU\Examples\Si101x\ADC.  Adding communications via UART or SPI: See code examples under C:\SiLabs\MCU\Examples\Si101x\UART and C:\SiLabs\MCU\Examples\Si101x\SPI Note that these code examples are installed as part of the Silicon Laboratories IDE installation. RF-to-USB-RD2 Rev. 0.2 13 ...

Page 14

... RF-to-USB-RD2 5.5. Hardware Development The RF to USB node design is a realistic reference design for a low-power wireless sensor node for a number of reasons:  Low-power operation possible using a 32 kHz timer or keypress to wake  Low-voltage operation using a single AAA cell and on-chip dc-dc boost converter  ...

Page 15

... V regulated power, derived from USB 5 V supply  C2 programming/debugging interface  UART interface via ToolStick Terminal 9. Test / Prototype Points DC-DC converter input voltage, ground. 10.Potentiometer Wiper connected to ADC input via P0.1. Potentiometer enabled by pulling port P0.0 low. P0.0 normally high impedance for power savings ...

Page 16

... RF-to-USB-RD2 6. PCB Schematics and Layouts 16 Rev. 0.2 ...

Page 17

... RF-to-USB-RD2 Rev. 0.2 17 ...

Page 18

... RF-to-USB-RD2 18 Rev. 0.2 ...

Page 19

... RF-to-USB-RD2 Rev. 0.2 19 ...

Page 20

... RF-to-USB-RD2 Figure 28. Dongle PCB Layout (L1 Top) 20 Figure 29. Dongle PCB Layout (L2) Rev. 0.2 ...

Page 21

... Figure 30. Dongle PCB Layout (L3) Figure 31. Dongle PCB Layout (L4 Bottom) Rev. 0.2 RF-to-USB-RD2 21 ...

Page 22

... RF-to-USB-RD2 Figure 32. Dongle PCB Layout (Top Assembly) Figure 33. Dongle PCB Layout (L4 Bottom Test Points) 22 Rev. 0.2 ...

Page 23

... References The RF to USB Reference Design Demo uses a 919.84 MHz RF link. The demo firmware is written on top of ® EZMAC PRO. The RF link data rate is 128 kbps using GFSK modulation. Both demo applications use EZMAC PRO channel 19. The output power is +13 dB for both the USB Dongle and Sensor Node. The PCB antennas on both Sensor Node and USB Dongle are designed for lowest possible cost, not maximum range ...

Page 24

... RF-to-USB-RD2 OCUMENT HANGE IST Revision 0.1 to Revision 0.2  Content completely revised. 24 Rev. 0.2 ...

Page 25

... N : OTES RF-to-USB-RD2 Rev. 0.2 25 ...

Page 26

... RF-to-USB-RD2 C I ONTACT NFORMATION Silicon Laboratories Inc. 400 West Cesar Chavez Austin, TX 78701 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Toll Free: 1+(877) 444-3032 Please visit the Silicon Labs Technical Support web page: https://www.silabs.com/support/pages/contacttechnicalsupport.aspx and register to submit a technical support request. The information in this document is believed to be accurate in all respects at the time of publication but is subject to change without notice. ...

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