Can I measure battery level without any external components nrf51

[Mikhail]

I want to undestand this. I can't see any examples with it. In the example ble_app_proximity I always received 100% level. If it possible, can anybody give a ADC config example for it? Thanks.

[awneil]

What do you mean by battery "level" ?

Note that battery voltage may not give any useful indication of the remaining battery life!

[awneil]

Did you actually read all the comments - and follow the link?

[Mikhail]

I watched same example in SDK 9. But I can't see config of ADC for internal battery measure. Your link I can't open. Relink pls.

[Mikhail]

I readed all comments, but I can't follow to link above. It doesn't open. Relink pls.

[Mikhail]

in my same example on SDK9 I have next code

/**

• @brief ADC initialization. */ void adc_config(void) { const nrf_adc_config_t nrf_adc_config = NRF_ADC_CONFIG_DEFAULT;

  // Initialize and configure ADC nrf_adc_configure( (nrf_adc_config_t *)&nrf_adc_config); nrf_adc_input_select(NRF_ADC_CONFIG_INPUT_2); nrf_adc_int_enable(ADC_INTENSET_END_Enabled << ADC_INTENSET_END_Pos); NVIC_SetPriority(ADC_IRQn, NRF_APP_PRIORITY_HIGH); NVIC_EnableIRQ(ADC_IRQn); }

As we see, it is no measure internal batt level by code:

nrf_adc_input_select(NRF_ADC_CONFIG_INPUT_2);