
Chapter 22: Sensors
Introduction
247
Psion Mobile Devices Developers Guide
22.1 Introduction
The following sensors are available on Psion computers:
• Accelerometer
•Gyroscope
• Digital Compass
• Light sensor
•Proximity Sensor
The Mobile Devices SDK includes APIs for reading data from these sensors, but not for configuring them.
They also cannot be configured through the GUI.
22.2 Accelerometer
A accelerometer measures linear acceleration.
The following Psion computers have an accelerometer that measures acceleration on three linear axes:
• Omnii XT15 (7545XA)
• Omnii RT15 (7545XC)
•EP10 (7515)
Default sensitivity
This is set to
±8 G
Default sampling rate
This is set to ~50 Hz
Mobile Devices SDK
The Mobile Devices SDK provides APIs that enable an application to make a single reading of the acceler-
ometer output, or to register a callback for repeated readings.
22.2.1 Getting Started with the Accelerometer
For articles on Ingenuity Working that will guide you in getting started with the accelerometer see
the following:
community.psion.com/tags/accelerometer/noteDG
22.2.2 Code Samples for the Accelerometer
For postings on Ingenuity Working that contain code samples that use the accelerometer see:
community.psion.com/tags/accelerometer/codeDG
22.2.3 Accelerometer API Elements
C: Accelerometer hardware on all computers with an accelerometer is read, using the
Accelerometer group.
.NET: Accelerometer hardware on all computers with an accelerometer is read, using the
PsionTeklogix.Sensors.Accelerometer class.
22.3 Gyroscope
A gyroscope is a device for measuring orientation. It measures angular velocity.
The following Psion computers have a gyroscope that measures angular acceleration on three axes:
•EP10 (7515)
Range
The maximum range is set to 250 degrees per second
Comentarios a estos manuales