communication:protocol
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communication:protocol [2013/02/01 17:41] mbrejza [Communications Protocol] |
communication:protocol [2015/04/03 09:49] (current) mfa298 removed eroneous , at the end of the example |
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| This is the typical protocol used by UKHAS members to transmit GPS data balloon to ground on the unlicensed bands. Parsing is handled by [[http://habitat.habhub.org/|habitat]] which can be configured to almost practically any format you can come up with, provided the string starts with $$CALLSIGN, end with a newline ('\n'), and contains printable ASCII characters. Fields are comma delimited. | This is the typical protocol used by UKHAS members to transmit GPS data balloon to ground on the unlicensed bands. Parsing is handled by [[http://habitat.habhub.org/|habitat]] which can be configured to almost practically any format you can come up with, provided the string starts with $$CALLSIGN, end with a newline ('\n'), and contains printable ASCII characters. Fields are comma delimited. | ||
| - | <code> $$CALLSIGN,sentence_id,time,latitude,longitude,altitude,optional speed,optional bearing,optional internal temperature,*CHECKSUM\n </code> | + | <code> $$CALLSIGN,sentence_id,time,latitude,longitude,altitude,optional speed,optional bearing,optional internal temperature*CHECKSUM\n </code> |
| * The individual fields can be of variable length, the minimum and maximum can be set in the payloads XML file. | * The individual fields can be of variable length, the minimum and maximum can be set in the payloads XML file. | ||
| Line 77: | Line 77: | ||
| **Useful code to calculate CRC16_CCITT checksum on the AVR** | **Useful code to calculate CRC16_CCITT checksum on the AVR** | ||
| + | |||
| + | (Refer to [[http://www.nongnu.org/avr-libc/user-manual/group__util__crc.html#gaca726c22a1900f9bad52594c8846115f | this page]] for implementation on other microcontrollers) | ||
| <code c>#include <stdio.h> | <code c>#include <stdio.h> | ||
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| return crc; | return crc; | ||
| }</code> | }</code> | ||
| - | |||
| ====== Getting Your Payload On the Tracker ====== | ====== Getting Your Payload On the Tracker ====== | ||
| You will need to fill out a flight document so the server can parse your telemetry strings and update the map.\\ | You will need to fill out a flight document so the server can parse your telemetry strings and update the map.\\ | ||
| Fill out the form here :[[http://habhub.org/genpayload/|Payload Document Generator]] the come and see us on [[ukhas:irc_channel|IRC]] to get it added. | Fill out the form here :[[http://habhub.org/genpayload/|Payload Document Generator]] the come and see us on [[ukhas:irc_channel|IRC]] to get it added. | ||
communication/protocol.1359740496.txt.gz ยท Last modified: 2013/02/01 17:41 by mbrejza
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