Remotely waking up your device

When your vehicle is parked and ignition is off, your device will go to sleep to save power. But if you are working on a project remotely and want to access your device, its possible to wake up your device from sleep.

To do so, simply send a TEXT/SMS to the phone number associated with your SIM card. This will wake up the device.

Its also possible to list the TEXT/SMS send to the device (if you are using a pre-paid plan and want to check status). This can be done from the ec2x module:

Try this command from the terminal:

ec2x.list_sms

If you find your device not to respond to the SMS wake up, then there is two things you can check:

1) Check if the modem is "Power save" mode, during sleep. If you go to settings->dongles->advanced->power there is a new section called "modem" "Put modem into lower power mode during sleep? When enabled it is no longer possible to wakup device on SMS."

2) The modem/SIM has a limit on how many unread messages it can contain. To clear the message you can use this command:

ec2x.query 'AT+CMGD=1,4'

Please note: Remotely waking up the device is not possible if your device is in hibernation/deep sleep. This will happen if your battery is in poor condition and voltage drops below 12.2V. This is a precausive measure, to ensure that the AutoPi will never drain your battery.

Discussion

If you'd like to discuss this topic with us or other fellow community members, you can do so on our community page dedicated for this guide: Remotely waking up your device