Silicon Laboratories Sensor-EXP-EVB User manual

Rev. 0.2 5/14 Copyright © 2014 by Silicon Laboratories Sensor EXP EVB UG
Sensor EXP EVB UG
Sensor EXP Evaluation Board USER’SGUIDE
1. Introduction
This Sensor-EXP-EVB is a hardware plugin card for the EFM32 starter kits (STKs). It contains the Si7013 humidity
and temperature sensor as well as the Si1147 UV and proximity sensor. A weather station software demo is
available to download to the Zero or Tiny Gecko STK through simplicity studio. When downloaded to the
EFM32ZG-STK3200 Zero Gecko STK or the EFM32TG-STK3300 Tiny Gecko STK, the demo displays humidity,
temperature, and UV index and performs gesture detection. Right or left gestures move the display type and, on
the temperature screen, up or down gestures move the display between °C or °F.
1.1. Features
Si7013 Humidity and Temperature sensor
Si1147 proximity sensor
3 IR LEDs for gesture detection
20-pin expansion header
Battery operation with long battery life
1.2. Getting Started
The first step to get started with your new Sensor-EXP-EVB is to go to www.silabs.com/simplicity-studio.
The simplicity studio software package contains all the tools, drivers, software examples and documentation
needed to use the Sensor-EXP-EVB.
You will need to connect the Sensor-EXP-EVB to the EFM32ZG-STK3200 Zero Gecko STK or the EFM32TG-
STK3300 Tiny Gecko STK. The demo code can be loaded using the USB cable and J-Link debug interface.

Sensor EXP EVB UG
2 Rev. 0.2
2. Weather Station Demo
2.1. Loading the Demo
Connect the USB cable to the STK and launch Simplicity Studio. Click on “Detect connected device” then click on
the Demos button (top right) and select the Sensor-EXP weather station demo from the list. Make sure the Bat/Dbg
switch on the STK is set to DBG and click Start to download the demo. The following figures show the Zero Gecko
STK screens.
Figure 1. Simplicity Studio

Sensor EXP EVB UG
Rev. 0.2 3
Figure 2. Device Detection


Sensor EXP EVB UG
4 Rev. 0.2
Figure 3. Select Demos

Sensor EXP EVB UG
Rev. 0.2 5
Figure 4. Demo Selection


Sensor EXP EVB UG
6 Rev. 0.2
2.2. Using the Demo
After download, the USB cable can be disconnected and the demo will run from battery power by switching the
Bat/Dbg switch to battery.
The demonstration will first show a start screen with some basic instructions. In order to conserve power the
demonstration code wakes up every few seconds and looks for a proximity event before looking for gestures. To
initiate a proximity event, hold your hand (with fingers closed) over the Sensor-EXP-EVB. Once the proximity event
has been detected, gesture detection is enabled. The gesture control state is fairly high-power compared to the idle
state, so the code will automatically terminate gesture detection after one minute of inactivity. Swiping your hand
across the Sensor-EXP-EVB in left and right motions will change the display as shown in Figure 5.
Figure 5. Displays
While on the temperature display, an up or down swipe motion will change the units to °C or °F.
Humidity
(Si7013) UV Index (Si1147)
Temperature
(Si7013)

Sensor EXP EVB UG
Rev. 0.2 7
3. Block Diagram
Figure 6. Sensor EXP Component Layout
Battery to
5V
converter
JP3
I2C
INTERFACE
All other lines
VMCU
(Battery)
5V
JP4
Si1147 UV
and
Proximity
sensor
Si7013
Humidity and
Temperature
sensor
LEDs

Sensor EXP EVB UG
8 Rev. 0.2
4. EXP Hardware Layout
4.1. Sensor-EXP-Evaluation Board
Figure 7. Assembled Demo Platform
Si1147 UV and proximity
sensor
Si7013 Humidity and
Temperature sensor
IR LEDs I2C ribbon connector
EXP connector for EFM32 STK

Sensor EXP EVB UG
Rev. 0.2 9
4.2. Sensor-EXP-EVB Connected to Zero Gecko STK
Figure 8. Sensor-EXP-EVB Connected to Zero Gecko STK
Hover hand to create a proximity event (Figure 9).
Figure 9. Hover Gesture
Swipe hand right or left to change display (Figure 10). Swipe up and down to change temperature display units.
Figure 10. Left/Right Swipe Gesture

Sensor EXP EVB UG
10 Rev. 0.2
5. Connectors
On the left hand side of the board there is a right-angle 20-pin expansion header is to allow connection to the
EFM32 STK board. This connector is not currently compatible with Wonder, Giant, or Leopard Gecko STKs.
However, with hardware modifications, the sensor-EXP-EVB can be used with these STKs as well. On the right
hand side of the board there is another connector to allow connection to another plugin card. J6 is a flat ribbon
cable connector to connect other devices such as additional sensors to the I2C bus.
6. Schematics, Assembly Drawings and BOM
The schematics, assembly drawings and bill of materials (BOM) for the Sensor-EXP-EVB are available through
simplicity studio when the EXP documentation package has been installed.

Sensor EXP EVB UG
Rev. 0.2 11
DOCUMENT CHANGE LIST
Revision 0.1 to Revision 0.2
Added Tiny Gecko.
Updated Figure 7 on page 8.
Updated Figure 8 on page 9.
Updated Figure 9 on page 9.
Updated Figure 10 on page 9.

Sensor EXP EVB UG
12 Rev. 0.2
CONTACT INFORMATION
Silicon Laboratories Inc.
400 West Cesar Chavez
Austin, TX 78701
Tel: 1+[phone]
Fax: 1+[phone]
Toll Free: 1+[phone]
Please visit the Silicon Labs Technical Support web page:
https://www.siliconlabs.com/support/pages/contacttechnicalsupport.aspx
and register to submit a technical support request.
Patent Notice
Silicon Labs invests in research and development to help our customers differentiate in the market with innovative low-power, small size, analog-
intensive mixed-signal solutions. Silicon Labs' extensive patent portfolio is a testament to our unique approach and world-class engineering team.
Silicon Laboratories and Silicon Labs are trademarks of Silicon Laboratories Inc.
Other products or brandnames mentioned herein are trademarks or registered trademarks of their respective holders.
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.
Silicon Laboratories assumes no responsibility for errors and omissions, and disclaims responsibility for any consequences resulting from
the use of information included herein. Additionally, Silicon Laboratories assumes no responsibility for the functioning of undescribed fea-
tures or parameters. Silicon Laboratories reserves the right to make changes without further notice. Silicon Laboratories makes no warran-
ty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Silicon Laboratories assume any
liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation
consequential or incidental damages. Silicon Laboratories products are not designed, intended, or authorized for use in applications intend-
ed to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where
personal injury or death may occur. Should Buyer purchase or use Silicon Laboratories products for any such unintended or unauthorized
application, Buyer shall indemnify and hold Silicon Laboratories harmless against all claims and damages.

Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Silicon Laboratories:
SENSOR-EXP-EVB