Gude HTTP over serial: Unterschied zwischen den Versionen
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HTTP over Serial | HTTP over Serial | ||
* offers the [[EPC HTTP Interface]] over serial interface | * offers the [[EPC HTTP Interface]] over serial interface | ||
| + | |||
| + | |||
| + | Serial interface Paramaters | ||
| + | * 115200 8N1 | ||
| + | ** 115200 Baud | ||
| + | ** 8bits | ||
| + | ** no parity | ||
| + | ** one stop bit | ||
| Zeile 8: | Zeile 16: | ||
** [message string] (CGI in, JSON out) | ** [message string] (CGI in, JSON out) | ||
** [ETX] end of text (0x03) | ** [ETX] end of text (0x03) | ||
| − | ** CRC: 2 bytes | + | ** CRC: 2 bytes xmodem CRC |
| + | |||
| + | |||
| + | Example 1: | ||
| + | request -> [STX] statusjsn.js?components=16384&svt=1&svi=1&svf=1&brief=1 [ETX] [CRC:0x5d49] | ||
| + | answer <- [STX] { "sensor_values":[[[1,1,null,1],[[237.310]]]],"eof":1 } [ETX] [CRC:0x5d49] | ||
| + | |||
| + | |||
| + | Example 2: | ||
| + | ./hosd --port /dev/ttyS0 --cgi "statusjsn.js?components=16384&svt=1&svi=1&svf=1&brief=1" --batch | python -m json.tool | ||
| + | |||
| + | { | ||
| + | "eof": 1, | ||
| + | "sensor_values": [ | ||
| + | [ | ||
| + | [ | ||
| + | 1, | ||
| + | 1, | ||
| + | null, | ||
| + | 1 | ||
| + | ], | ||
| + | [ | ||
| + | [ | ||
| + | 236.61 | ||
| + | ] | ||
| + | ] | ||
| + | ] | ||
| + | ] | ||
| + | } | ||
Version vom 30. Mai 2014, 13:38 Uhr
HTTP over Serial
- offers the EPC HTTP Interface over serial interface
Serial interface Paramaters
- 115200 8N1
- 115200 Baud
- 8bits
- no parity
- one stop bit
Packet format:
- [STX][message-string][ETX][CRX]
- [STX] start of text, (0x02)
- [message string] (CGI in, JSON out)
- [ETX] end of text (0x03)
- CRC: 2 bytes xmodem CRC
Example 1:
request -> [STX] statusjsn.js?components=16384&svt=1&svi=1&svf=1&brief=1 [ETX] [CRC:0x5d49]
answer <- [STX] { "sensor_values":[[[1,1,null,1],237.310]],"eof":1 } [ETX] [CRC:0x5d49]
Example 2:
./hosd --port /dev/ttyS0 --cgi "statusjsn.js?components=16384&svt=1&svi=1&svf=1&brief=1" --batch | python -m json.tool
{
"eof": 1,
"sensor_values": [
[
[
1,
1,
null,
1
],
[
[
236.61
]
]
]
]
}