D4.01 GSM Dialer with SMS Voltage and Battery Monitoring Testing Video

Just a little video showing some testing being performed on the new D4.01 PCB.  This will be available on the website shortly.

The PCB has two analogue terminals for voltage measurement which can be sent by SMS or by email.  The supply voltage is also monitored for 12V battery operation.
It also has four high/low digital inputs and one volt-free relay output which can be operated by SMS or call.

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