remote wake up

[karoun]

Hello,

I am integrating saadc example to ble_uart in order to receive analog input signals and send them via ble connection to android application. Low power consumption is an important consideration in this application. I am looking for a way that I could send a wake up call to the device via android application and then device start advertising and sending data(for example in blinky example there is this possibility of turning on LED using android app). But I do not know how to do it. Is there any example that I can look at?

Best regards,

Kosar

[awneil]

The Central (eg, phone) cannot see the Peripheral unless it is advertising - so there is no way to do this using BLE alone.

karoun said:

Low power consumption is an important consideration

How "low", exactly?

Even when advertising, the time that the radio is actually active is only a small fraction of the total time.

Could you use another wakeup signal; eg, NFC, a tap. etc ?

Choose your advertising parameters carefully - it's a tradeoff between how quickly & reliably the Central can find the device, and how much power you use.