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576:-byte message payload and an optional 2-byte CRC checksum. The header consists of one protocol byte, a 2-byte message length (total length, including header and CRC), a 1-byte source port and a 1-byte destination port number. The destination port number should be 0x28 for SSI messages.
549:. The use of a checksum is defined by the SSI message/command type, with lower case commands indicating the use of CRC. The header consists of a start byte (0xFE), a 2-byte (total) length of the message and a 2-byte
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defined by nanoIP) is used as the message format. If individual messages are important, nanoTCP can be used, as it provides flow control and retransmission at a cost of message size and increase in network traffic.
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Point-to-point messaging with SSI can be done with SSI/UART. An SSI UART message consists of a 3-byte UART header, an SSI message as the payload and an optional
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SSI networking in a variable environment is done using nanoIP. In a typical case using SSI, an individual message is not important, and so nanoUDP (simplified
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219:) and a one byte message/command type. The different possible values for the message/command type are presented in SSI v1.2 command base.
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is a simple communications protocol designed for data transfer between computers or user terminals and smart sensors.
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and networking nanoIP applications. SSI also provides polling sensors and streaming sensor data. For
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215:-byte payload. The header consists of a one byte address (wildcard is '?', 0x3F in
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157:. Currently SSI is being developed within the Mimosa Project, part of the
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are used to find and configure sensor units utilizing the SSI-protocol.
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The SSI protocol is used in point-to-point communications over
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Framework
Programmes for Research and Technological Development
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A nanoUDP message consists of a 5-byte nanoUDP header, an
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sensor tags SSI specifies memory map for sensor data.
597:0.5 December 5, 2003, not compatible with previous
508:For data streaming purposes defined commands are:
211:An SSI message consists of a 2-byte header and an
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178:The criteria for SSI protocol development are:
141:The SSI protocol has been developed jointly by
615:1.2 May 27, 2006, not compatible with previous
192:Sample implementation of the SSI protocol for
505:are used to read sensor data infrequently.
357:Sensor response with one byte status field
188:small footprint on the server (sensor) side
50:. Unsourced material may be challenged and
556:length to help identify the frame start.
114:Learn how and when to remove this message
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533:M – data response with many data points
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368:Sensor response with many data points
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302:Get configuration data for a sensor.
324:Set configuration data for a sensor
48:adding citations to reliable sources
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501:D – data response with status field
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401:Delete sensor observer / listener
63:"Simple Sensor Interface protocol"
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456:Free data for custom purposes
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412:Observer / listener finished
203:during August 2006 by Nokia.
527:J – sensor listener created.
484:S – set sensor configuration
481:G – get sensor configuration
313:Configuration data response
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646:Application layer protocols
524:L – request sensor listener
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512:O – create sensor observer
185:simple – minimal overhead
434:Sensor listener created
423:Request sensor listener
544:Cyclic redundancy check
495:R – request sensor data
491:The group of commands:
462:The group of commands:
379:Create sensor observer
128:Simple Sensor Interface
153:, Ionific, Mermit and
603:0.7 December 22, 2004
521:U – observer finished
346:Sensor data response
223:SSI v1.2 command base
207:SSI message structure
199:will be published as
612:1.1 October 27, 2005
606:0.8 January 14, 2005
600:0.6 November 3, 2004
515:Y – observer created
472:C – sensor discovery
335:Request sensor data
291:Reset sensor device
44:improve this article
594:0.4 October 2, 2003
518:K – delete observer
475:N – discovery reply
609:1.0 April 11, 2005
588:0.2 April 29, 2003
585:0.1 March 14, 2003
538:Point-to-point SSI
155:University of Oulu
641:Network protocols
530:V – data response
498:V – data response
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450:F,f (0x46, 0x66)
439:E,e (0x45, 0x65)
428:J,j (0x4A, 0x6A)
417:L,l (0x4C, 0x6C)
406:U,u (0x55, 0x75)
395:K,k (0x4B, 0x6B)
390:Observer created
384:Y,y (0x59, 0x79)
373:O,o (0x4F, 0x6F)
362:M,m (0x4D, 0x6D)
351:D,d (0x44, 0x64)
340:V,v (0x56, 0x76)
329:R,r (0x52, 0x72)
318:S,s (0x53, 0x73)
307:X,x (0x58, 0x78)
296:G,g (0x47, 0x67)
285:Z,z (0x5A, 0x7A)
274:N,n (0x4E, 0x6E)
269:Discover sensors
263:C,c (0x43, 0x63)
252:A,a (0x41, 0x61)
241:Q,q (0x51, 0x71)
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591:0.3 May 20, 2003
280:Discovery reply
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182:general purpose
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104:December 2015
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65: –
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59:Find sources:
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29:This article
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236:Description
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42:Please help
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201:open source
635:Categories
453:<->
442:<->
409:<->
398:<->
233:Direction
74:newspapers
478:Z – reset
466:Q – query
31:does not
554:Negation
547:checksum
136:protocol
551:bitwise
431:C->
420:<-S
387:<-S
376:C->
365:<-S
354:<-S
343:<-S
332:C->
321:C->
310:<-S
299:C->
288:C->
277:<-S
266:C->
255:<-S
244:C->
147:Vaisala
88:scholar
52:removed
37:sources
626:nanoIP
445:Error
247:Query
194:MSP430
151:Suunto
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217:ASCII
143:Nokia
95:JSTOR
81:books
173:RFID
169:UART
126:The
67:news
35:any
33:cite
566:UDP
132:SSI
46:by
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