Turn it on and off
Power On
Briefly press the button using a stick or a pen.
Watch the led reaction.
If slow continuous blinking:
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Capacitor charging is in progress, wait for a few minutes.
If steady (~10s):
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The device is turning on and sending an initial message.
It will then perform a GPS location for approximately 45 seconds.
The first measurements will be received around 10 minutes later.
Power Off
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Press the button again. The LED blinks rapidly 5 times then fades.