seconds to change from on to off) This is the only way to truly disable the
cellular module.
Mic+ and Mic- connections for attaching an electret microphone for audio
applications (external audio interface)
Spk+ and Spk- connections for attaching a 8 ohm 1W speaker for audio
applications (external audio interface)
FONA connections & LEDs
All the way to the right we have the cellular-only connection parts. Up top is a
standard uFL connector, you attach your GSM antenna here
Below that is the bluetooth antenna (small white rectangle with red marking)
At the bottom are the two cell-status LEDs.
The middle PWR LED will light up green whenever the cellular module is active and
has good power.
The NET LED will blink in blue let you know the status of the cellular connection You
can use this for checking the current state without sending an AT command:
64ms on, 800ms off - the module is running but hasn't made connection to the
cellular network yet
64ms on, 3 seconds off - the module has made contact with the cellular network
and can send/receive voice and SMS
64ms on, 300ms off - the GPRS data connection you requested is active
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©Adafruit Industries
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