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SWAP Protocol Decoder Encoder
danbim edited this page Apr 6, 2011
·
7 revisions
The SWAP protocol provides an easy and lightweight alternative to service oriented application level protocols like the Constrained Application Protocol (CoAP).
0: CMD_TYPE = 70
1: REQUEST_ID
2: REQUEST_TYPE
3: REQUEST_OPTIONS_LENGTH
4-n: REQUEST_OPTIONS
0: CMD_TYPE = 71
1: REQUEST_ID
2: RESPONSE_CODE
3: RESPONSE_PAYLOAD_LENGTH
4-n: RESPONSE_PAYLOAD
0: CMD_TYPE = 72
1: SUBSCRIPTION_ID
2: PAYLOAD_LENGTH
3-n: PAYLOAD
The following table shows the possible values for the various fields of request and response messages:
| REQUEST_TYPE | REQUEST_OPTIONS | RESPONSE_PAYLOAD |
|---|---|---|
| 0x00 GET_SENSORS | newline character-separated string of sensor names and associated key-value pairs, e.g., "temp=1\nhumid=2\nacc=3" | |
| 0x01 GET_SENSORNODE_META_DATA | key-value pairs, newline character-separated, e.g., "type=isense\nrevision=jennic85391" | |
| 0x02 GET_SENSOR_VALUE | 1 byte uint_8, identifying the sensor, e.g. "1", see GET_SENSORS | sensor-specific binary representation of a sensor value, see below |
| 0x03 GET_SENSOR_META_DATA | 1 byte uint_8, identifying the sensor, e.g. "1", see GET_SENSORS | key-value pairs, newline character-separated, e.g., "type=temperature\nunit=degreecelsius" |
| 0x04 SUBSCRIBE | key-value pairs, newline character-separated, e.g., "method=push\nduration=7200000" | 1 byte subscription ID |
| 0x05 UNSUBSCRIBE | 1 byte subscription ID | |
| 0x06 PUT_SENSOR_META_DATA | 1 byte identifying the sensor, e.g., "1", 1 byte string length, string with meta data as key-value pair, e.g., "type=temperature" | empty response with an appropriate response code |