If it can help anyone, I used some code from internet, modified it so that you can use a variable to convert.

// C program to convert hexadecimal to decimal

#include <math.h>
#include <stdio.h>
#include <string.h>

int decimalNumber = 0;

uint8_t hexa1;
uint8_t year;
void hextodec (void ...

I have time values that are retrieved and stored as decimal values. But the same value needs to be written as BCD to the registers of an external RTC.

For example

uint8_t year = 19; //year is 2019, value in decimal

spi_rtcc_wr( rtcc reg: RTCYEAR, time_var: 0x19); //but external RTC needs that 19 ...

The internal RTC is written into by the example SNTP code of the ESP-IDF. The timeinfo is the structure used to get the internal RTC data. The structure has members for year, hour, minutes... that are accessible by reading .tm_year, .tm_hour, .tm_min...etc...

The good thing is I can get the data ...

I think I may have found an answer, but need to test more.

I did

uint8_t hrt = timeinfo.tm_hour;

and then to test I printed

ESP_LOGI(TAG, "The formatted int hour is : %d", hrt);

And it printed the correct value of the current hour that was stored in the internal RTC. Does this make sense?

Hello,

I'm working with Espressif-IDE and framework 5.3.1. I am able to get the updated time from SNTP and have it written to the ESP32 RTC. And I can also retrieve individual elements of the RTC time using specifiers in the strftime function, for example

strftime(MY_TIME, sizeof(MY_TIME), "%I:%M ...

Yes this is reassuring. I also looked up your name and saw that you are an Espressif engineer, so that confirmed things.
Will Espressif be updating their how-to install page to also recommend the IDE? Thanks

I had Eclipse with ESP-IDF setup a few years ago using Kolban's youtube guides. I'm trying to get back into it but of course versions are newer so that guide doesn't apply 100% now. But now I see this Espressif-IDE. It doesn't seem to be officially backed by Espressif but is used by some. My ...

With nothing connected to the pin,

- Internal Pull-down value: ~45K
- Your Vcc: 3.3V (?)
= 73uA per pin

Depending on the external circuitry hooked to those pins, it could increase the current drain as well.

The 45K pull-down is average, it can vary a lot.

Can you share the general connection ...

The I2C bus can hang up.

"If the data line (SDA) is stuck LOW, the master should send nine clock pulses.The device that held the bus LOW should release it sometime within those nine clocks.If not, then use the HW reset or cycle power to clear the bus. The master I2C must be
able to generate this ...

Well I can see how I may have caused the issue. With old age comes bad eyes. The GND pin that I thought I connected my logic analyzer to was actually the CMD pin of the ESP32 flash on my dev kit. Now I know why I was seeing crazy garbage on my SPI pins!
SPI is better now, but I still have the ...