Integration and RF Test
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The $RT (Receive Test) command will
return the RSSI value of your device’s
background noise. This value should be
between -93 and -117 dBm to be able
to transmit data to a Swarm Satellite:
You can measure this value by
commanding the Tile to print it at any
interval you wish:
$RT 5*13
(5 second interval)
$RT 10*27
(10 second interval)
$RT 20*24
(20 second interval)
$RT 0*16
(0 response/cancel)
Adjust your hardware configuration
and location until the RSSI value is
consistently between -93 and -117
dBm.
$RT 10*27
$RT OK*23
$RT RSSI=-109
$RT RSSI=-111
$RT RSSI=-108
$RT RSSI=-110
$RT RSSI=-111
...
Place the Eval Kit outdoors (but within
range of your WiFi Network), with a
clear view of the sky.
You may mount the Eval Kit to provide
a better field of view, ensuring that the
VHF antenna does not make contact
with any objects other than the SMA
mount.
One example mounting solution is
shown above.
The Eval Kit will have best transmission
results outdoors and ~5 km away from
cities (where RF noise is common).
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