Can i use it to measure on one pin a 4khz signal?

I was using the adc with i2s dma. My code looks like this: I2S config: void configure_i2s(){ //pinMode(36,INPUT); i2s_config_t i2s_config = { .mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX | I2S_MODE_ADC_BUILT_IN), // I2S receive mode with ADC .sample_rate = 144444, // sample rate .bits_per_sam...

Thank you all for your patience and help.
The problem was with the adxl module.
In this module version was a 0 ohm resistor on the miso pin to the gnd, and it was pulled the line to low all the time.

ESP's internal ADC is crap in itself. I can not measure properly in it. I was used the adc1 with i2s dma before, and the signal was noisy A.F. I realized that i need to pull the gpio36 and 39 down because of the noise. So i lost two pins because of just that. After that i realized that if i get any ...

Did you solved it?

Hello guys! I want to use two spi interface of the esp32. I'am already using the TFT_eSPI.h lib with the VSPI of the esp32 on core0. Now i want to implement the HSPI on core1 for an ADXL345 accelerometer. I have this sketch that i'am trying to implement but this is not working for some reason. I al...

Is anybody used an external adc with esp32?
I want to use the MCP33131D SPI adc.
https://www.microchip.com/wwwproducts/en/MCP33131D-10
Any toughts?

Hello guys! I have an RFID reader. I attach an interrupt on one of the ADC1 pins (GPIO32 , 33, 34, 35, 36 39) . for falling edge. If i touch a tag card to it, i get the interrupt and i can read from it. The problem is that after i get the first interrupt, i get several more interrupts. But this pro...

Hello guys! I want to use an external ADC module for my esp32 project. Do you have any recommendation what can i use for this? My goal is to measure at least a 4khz signal in a very accurate way. -What is the differences on SPI and I2C adc? -Is SPI faster? If it is faster why i need it to be faster...

Iam reading an analog value on the GPIO36 PIN with i2s dma. The thing is when an interrupt comes on GPIO39 or 34 or 35, my i2s adc read goes crazy and generating very wrong reads. The interrupt comes from an RFID reader when a member touching its tag to it. These pins are INPUT only pins, so the int...