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The APRS on-the-air protocol (see my APRS page) also allows for a wide range of telemetry experiments. I am using a 68HC11 based microcontroller system (LEMPS) to carry out some telemetry experiments. The present idea is to use it as a remote weather station by adding various additional sensors (pressure, humidity, etc.). Telemetry data are transmitted as AX.25 packets in the 144 MHz amateur radio 2-meter band using the APRS digipeater network.
Below you can have a closer look at the telemetry system itself and at a telemetry recording.
Data recorded by the LEMPS weather station can be reviewed here.
This plot shows light intensity and temperature (°Celsius) recorded in Zauggenried (JN37SB) on August 20th, 1999.
The "noise" on the light intensity (blue) corresponds to clouds briefly hiding the sun.
Ernst Niggli's Home Page | Ernst Niggli's Group Page | HB9PVI APRS Page |
These on-the-air packets are then analyzed by MacAPRS software and an example is shown below.
Ernst Niggli's Home Page | Ernst Niggli's Group Page | HB9PVI APRS Page |
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