Can it compare two RSSIs in nRF51822?

RE: Can it compare two RSSIs in nRF51822?

Einar Thorsrud — Thu, 03 Mar 2016 06:57:50 GMT

I'm happy to help. If you are satisfied with my answer I would appreciate it if you could accept it by clicking the circle checkmark to the left of it.

RE: Can it compare two RSSIs in nRF51822?

Toru — Wed, 02 Mar 2016 23:46:07 GMT

Thank you for quick reply. I will check the Nordic UART Service Client example and the refered SDK.

Thanks for any helps.

RE: Can it compare two RSSIs in nRF51822?

Einar Thorsrud — Wed, 02 Mar 2016 07:34:54 GMT

You can find the code for the Nordic UART Service Client example that I refer to in SDK version 11 alpha. It is located under <SDK folder>\examples\ble_central\ble_app_uart_c.

RE: Can it compare two RSSIs in nRF51822?

Toru — Wed, 02 Mar 2016 02:38:28 GMT

Thank you for your answer. I could not find this sample code. How can I find a sample code when I need an other sample code?

RE: Can it compare two RSSIs in nRF51822?

Einar Thorsrud — Wed, 24 Feb 2016 09:20:26 GMT

Yes, when you have decided which of the advertisers has the highest RSSI, setting a GPIO accordingly is trivial. You can configure a GPIO as output using nrf_gpio_cfg_output(), set it using nrf_gpio_pin_set() and clear it using nrf_gpio_pin_clear.

RE: Can it compare two RSSIs in nRF51822?

Toru — Wed, 24 Feb 2016 09:00:31 GMT

Thank you for your answer. I have one more question.

Can it get an output signal using a GPIO port of nRF51882 after it have gotten the address and RSSI of an Advertiser by BLE_GAP_EVT_ADV_REPORT?

For Example, A1=Advertiser1, A2=Advertizer2, Can it get a high signal level from a GPIO port, when the RSSI of A1 was higher than A2?

Thank for your help.

RE: Can it compare two RSSIs in nRF51822?

Einar Thorsrud — Tue, 23 Feb 2016 09:46:08 GMT

You will get a BLE_GAP_EVT_ADV_REPORT event whenever an advertisement is received. The advertisement report (ble_gap_evt_adv_report_t) will contain both the peer address and RSSI. Using this information, you can compare the RSSI of various advertisers.

You can see an example of how advertisement data is used this in the on_ble_evt() function in main.c of the Nordic UART Service Client example (though this does not use the RSSI).