RE: NRF51822 - reduce frequency trasmission, string in the trasmission and sleep mode

Håkon Alseth — Tue, 28 Jul 2020 13:49:12 GMT

Hi,

[quote user=""]I want to reduce the frequency of trasmission data (to reduce the power consumption), and I don't know what is the parameter need to change. I have changed the 'APP_ADV_INTERVAL' but nothing is happen. It trasmit every 1 second. Can you help me?[/quote]

This will change your advertising interval, not the connection interval. You can set your peripherals limits by changing defines "MIN_CONN_INTERVAL" and "MAX_CONN_INTERVAL", but its ultimately up to the central to set a interval the peripheral shall operate with.

There's good information related to how bluetooth LE works here:

https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy

[quote user=""]When I receive the data in my phone I only see the value HEX of the ADC. I'd like to see also the words 'ADC value is: 0x00000000000'. Is it possible?[/quote]

If you create an custom application on your phone, yes; that is possible. But, not by using the nRF connect application.

[quote user=""]3) Is there a possibility to wake up the chip ever 'x' second, acquire the data, trasmit and return in sleep mode?[/quote]

You can use an app_timer instance that triggers periodically for this. See this guide for detailed info:

https://devzone.nordicsemi.com/nordic/short-range-guides/b/software-development-kit/posts/application-timer-tutorial

Kind regards,

Håkon