read battery status using nfc with nrf52832

RE: read battery status using nfc with nrf52832

pd@learner — Wed, 27 Mar 2019 10:41:14 GMT

The problem is now solved. Actually problem is with my pca10040 board.I have tried with another pca10040 board and got required output.

RE: read battery status using nfc with nrf52832

Edvin — Wed, 27 Mar 2019 09:17:39 GMT

Ok. Do you get the callback from the saadc? Does it have any values, or is it 0?

And en_text_rec, is it 0, or does it contain a value?

Have you tried debugging (turn off optimization in your project) to see where it fails?

RE: read battery status using nfc with nrf52832

pd@learner — Tue, 26 Mar 2019 11:53:35 GMT

uint8_t  percentage_batt_lvl;

void get_battery_status()
{
	saadc_init();
	nrf_drv_saadc_sample();
	nrf_delay_us(200);
	nrf_drv_saadc_uninit();
  
}
void sperNum(uint8_t sepNum, uint8_t num[])
{
   
   num[0] = sepNum%10+48;
   num[1] = (sepNum/10)%10+48;
   num[2] = (sepNum/100)+48;
   
   
}
static void en_record_add(nfc_ndef_msg_desc_t * p_ndef_msg_desc)
{
/** @snippet [NFC text usage_1] */
uint32_t err_code;

static const uint8_t en_code[] = {'e', 'n'};

uint8_t p[3];

sperNum(percentage_batt_lvl,p);

NFC_NDEF_TEXT_RECORD_DESC_DEF(en_text_rec,
UTF_8,
en_code,
sizeof(en_code),
p,
sizeof(p));
/** @snippet [NFC text usage_1] */

err_code = nfc_ndef_msg_record_add(p_ndef_msg_desc,
&NFC_NDEF_TEXT_RECORD_DESC(en_text_rec));
APP_ERROR_CHECK(err_code);

}

I have called get_battery_status function in main context in for loop.

RE: read battery status using nfc with nrf52832

Edvin — Tue, 26 Mar 2019 11:13:26 GMT

[quote user="pd@learner"]But when i am trying to read battery status every time it reads 0 value. [/quote]

How exactly do you measure the battery level, and how do you pass on to the NFC?

RE: read battery status using nfc with nrf52832

pd@learner — Mon, 25 Mar 2019 13:40:37 GMT

Thanks For quick response.

I have tried sdk12.3.0\examples\nfc\record_text. It reads 'Hello World' in three different languages. But when i am trying to read battery status every time it reads 0 value.

RE: read battery status using nfc with nrf52832

Edvin — Mon, 25 Mar 2019 13:26:46 GMT

Hello,

Yes. You can write whatever data you want to the NFC tag. Please check out the example:

SDK15.3.0\examples\nfc\record_text

Best regards,

Edvin