Henrik, I know that this topic has many posts. But in this post from July 21, 2024, I provided all the recommendations for carrying out the project. I recommend that you follow these recommendations so that your project works. Best regards. ESP32 FREQUENCY METER - NEW VERSION: https://www.esp32.com/...

Hi Wukon, In this project the minimum resolution of the oscillator is 1. A floating value is not allowed. if (resolution < 1) resolution = 1; // set min resolution //---------------------------------------------------------------------------- void init_osc_freq() // Initialize Oscillator to test Fre...

Hi Davyboy, The ESP32 frequency counter takes approximately 1 second (1 million microseconds) to make one measurement. uint32_t sample_time = 1000000; // Sample time of 1 second to count pulses To modify the program for frequency measurements up to 50 KHz, make the following changes: uint32_t sample...

Hi DavyBoy, First of all, this frequency meter only accepts digital signals up to 3.3V. Do not use analog signals directly. You will have to use a circuit to adapt analog signals. I may implement this in the future. "Now I am trying to increase the sampling rate because I want to use this device for...

Hi OSCPUDEV,

We hadn't thought of this alternative of using the MCPWM peripheral in our project. Maybe at the time of the project's development, there wasn't much documentation available. But thanks for the tips!

Take a look to this tutorial:
https://tronixstuff.com/2013/08/05/part ... ltiplexer/

HC4067 Datsheet:
https://www.ti.com/lit/ds/symlink/cd74hc4067.pdf

ESP32 FREQUENCY METER - 2 CHANNELS - Version 3 - Checking out Testing my old Crystal Oscillators - 20.000 MHz and 14.318180 MHz. Very Good! Breadboards and long wires are susceptible to noise and can interfere with measurements. The ideal is to assemble the entire circuit on a printed circuit board...

ESP32 FREQUENCY METER - 2 CHANNELS - WORKING !! As promised, I managed to fix the interference problem between the interrupts of the two Pulse Counters 0 and 1. The solution was to disable the Pulse Counter interrupt right after the complete count using the " pcnt_isr_unregister " function. After p...

There may be many differences. I suggest you compare the datasheets. MX25V16066M2I02 from Macronix - Datasheet: https://br.mouser.com/datasheet/2/819/MX25V16066_2c_2_5V_2c_16Mb_2c_v1_5-3401199.pdf W25Q16JVSNIQ from Winbond - Datashhet: https://br.mouser.com/datasheet/2/949/w25q16jv_spi_revg_03222018...

You may not be able to understand, but I suggest you start studying your display module.

ILI 9488 Datasheet:
https://www.hpinfotech.ro/ILI9488.pdf

https://forums.adafruit.com/viewtopic.php?t=205250

Some Code:
https://github.com/search?q=ili9488&type=repositories