communication:protocol
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communication:protocol [2013/02/01 17:38] – [Communications Protocol] mbrejza | communication:protocol [2015/04/03 09:49] (current) – removed eroneous , at the end of the example mfa298 | ||
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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:// | 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:// | ||
- | < | + | < |
* 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. | ||
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**Useful code to calculate NMEA xor checksum** | **Useful code to calculate NMEA xor checksum** | ||
- | Please note: The use of xor checksum is not advised, the CCITT checksum below has much better performance and is preferred | + | |
+ | Please note: The use of xor checksum | ||
<code c># | <code c># | ||
#include < | #include < | ||
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**Useful code to calculate CRC16_CCITT checksum on the AVR** | **Useful code to calculate CRC16_CCITT checksum on the AVR** | ||
+ | |||
+ | (Refer to [[http:// | ||
<code c># | <code c># | ||
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return crc; | return crc; | ||
}</ | }</ | ||
- | |||
====== 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 : | Fill out the form here : |
communication/protocol.1359740331.txt.gz · Last modified: 2013/02/01 17:38 by mbrejza