I currently have a piece of avionics equipment that outputs a serial data stream. The stream contains a data field that is the total flight time--i.e., flight duration. I was hoping to find/pay someone to build a small external device that reads the serial data stream and triggers an alarm after a certain, user defined, flight duration is reached.
As a computer scientist, it is a bit beyond my skills to build. Ideally it should be a small lightweight box that is capable of reading the serial data stream and when a user selected duration (e.g., 1 hour) is reached an external LED and/or buzzer is triggered. The device should be capable of running off 12-14v DC current.
I can provide details of the serial data output stream coming from the avionics device. Here is an overview:
The RS-232 interface outputs pressure derived measurement, flight status as well as the GPS position. The ouput communication protocol is in "NMEA / pseudo NMEA”, with device specifier “PFA”.
The checksum is the 8-bit XOR of all characters in the sentence including the “,” delimiters, between but not including the “$” and “*” characters. All output messages are terminated with <CR><LF>
The Flight Status Data Packet is in the following format:
$PFA,FLT,f,s,dddddd,tttt,u,llll,v,aaaaaa*hh
where aaaaaa is the duration airborne in format HHMMSS, empty before takeoff
Thanks in advance for any help.
As a computer scientist, it is a bit beyond my skills to build. Ideally it should be a small lightweight box that is capable of reading the serial data stream and when a user selected duration (e.g., 1 hour) is reached an external LED and/or buzzer is triggered. The device should be capable of running off 12-14v DC current.
I can provide details of the serial data output stream coming from the avionics device. Here is an overview:
The RS-232 interface outputs pressure derived measurement, flight status as well as the GPS position. The ouput communication protocol is in "NMEA / pseudo NMEA”, with device specifier “PFA”.
The checksum is the 8-bit XOR of all characters in the sentence including the “,” delimiters, between but not including the “$” and “*” characters. All output messages are terminated with <CR><LF>
The Flight Status Data Packet is in the following format:
$PFA,FLT,f,s,dddddd,tttt,u,llll,v,aaaaaa*hh
where aaaaaa is the duration airborne in format HHMMSS, empty before takeoff
Thanks in advance for any help.