Which device is connected to the I2C bus? Does this device already have pullup resistors?
I suggest testing I2C addressing with this scanner

https://www.esp32.com/viewtopic.php?f=18&t=4742

I've been working with Golang for a few months now, despite not being a professional programmer. Very fascinated with simplicity and efficiency. I've done some tests with Tiny Go with another microcontroller. My dream is to use Go to program all microcontrollers. And forget about the complexity of t...

Hello,

Installing ESP32 Board in Arduino IDE 2.0 (Windows, Mac OS X, Linux)
https://randomnerdtutorials.com/install ... o-ide-2-0/

Bom dia Luis,
If you need help with any project, I suggest you open a new topic in the Lab de Garagem.
https://labdegaragem.com/
https://labdegaragem.com/forum/topic/new
Best regards,
Gustavo Murta

Hello Luis, " What would be the shortest time for sampling a frequency?" In our project, the sampling time was defined as one second, to give more precision in measuring the frequency. sample_time = 1000000; ( one million miliseconds) There is nothing to reduce this time, but be aware that you will ...

Hi Minatel,
did you test the project?
Thank you,
Gustavo

Hi Deviashin,
As described in the project, you must use three gpios to make the frequency meter.
Use a Port expander for your other needs.

Did you understand all about of this information? " The SPI frame consists of: • The Master writes on the MOSI line the 7-bit address of the register to be read from or written to. • The next bit on the MOSI line is the read/write (RW) indicator. A high state indicates a Read and a low state indicat...

Hi Askhay, First, you must select the appropriate model for your option: ACS71020KMABTR-030B3-SPI (VCC = 3,3V and SPI interface). Maximum SPI Clock Frequency = 10 MHz (I suggest you do initial tests with 1 MHz) "It is recommended that the ACS71020 be the only device on the SPI bus if using SPI commu...

Hi don,
Very good! We are happy to know that the project works fine for you.
We are thinking of another method of measuring frequency - counting the duration time of each pulse (for low frequencies).
And then Dual Slope DVM.
Wait for it!