Why Do You Have So Little Flash And Ram - Universal Devices ISY-994i User Manual

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24.6.1.1Why do you have so little flash and RAM?

• Because we do not need more. We have a multi-tasked web server with an SD based

file-system on board. With the current configuration, we still have around 75K of

free space left on the flash and 300K on the RAM.

• A derivative of uCOS runs in less than 170K. I shall not discuss the benefits of uCOS

(vs. ThreadX) simply because performing a copy/paste does not benefit this

HTTP Stack + Web Server

SOAP 1.1/1.2 Stack

UPnP Stack driven by Publish/Subscribe (DPWS to be available by end of 2007)

D2D Stack (triggering events on local/remote devices)

INSTEON driver - low level driver for communications with INSTEON

SMS/Pager/Email drivers

Scheduler with sunrise/sunset

Cryptography (3 levels: none, 1. Digital Signatures Only, 2. Digital Signatures with

Encryption, and 3. RSA). Default is 2

NTP client is available but disabled

• Java client based on subscriptions. No polling is ever done from the client to ISY.

Upon "any" state change, the clients are notified.

• JSDK: our Java SDK to develop an ISY client in a matter of days. One can even upload

files to ISY and have it served up.

• MCE Client for Microsoft Media Center which allows you to control ISY using MCE

remote control

• UDMobile client for Windows Mobile 5.0 platforms based on IBM J9