No real use making Ts a double if you then go cast it to an int anyway:

nextSample += (uint64_t)Ts


Suggest you make nextSample a double as well.

Hi Sprite ,
Thanks again for your help.
I’ve modified my code, and now I’m able to synchronize both signals (ESP vs. commercial system).
I’m ...

The error is fairly small - I'm eyeballing that at the end the amplitude is about 1/3rd of the actual waveforms, meaning it leads or lags by (sin-1(0.333)/2*pi=)0.04 cycles. On a total of 80 cycles, that's about 0.05%. That is probably be explained by the fact that you're using ints for Ts ...

The error is fairly small - I'm eyeballing that at the end the amplitude is about 1/3rd of the actual waveforms, meaning it leads or lags by (sin-1(0.333)/2*pi=)0.04 cycles. On a total of 80 cycles, that's about 0.05%. That is probably be explained by the fact that you're using ints for Ts ...

Hello everyone,

I am working with an ESP32 and an ICM-45686 IMU.
My goal is to acquire accelerometer and gyroscope data at 1.024 kHz and send it to a PC via serial. On the PC side, I have a Python script that receives the data and saves it.

I would like to evaluate whether the sampling rate of the ...