MicroPython Forum (Archive)

Hi here ! I have 2 i2c sensors one flowmeter and one bmp280 (temp / pressure sensor). My fondamental question is I wants to grab my datas on micropython array, encode it with json fromat and send it to serial protocol to a PC Cpython script which will collect various datas. When I will do my measure...

Hi, I wonder if it's possible to pass an array with pyboard.py from micropython to python like : Mes_Temp = float(pyb.exec("mes.Mes_Temp()")) Where the micropython function Mes_Temp() returning an array of float values from micropython board to my python script from my computer. This is the good way...

Hi, I works a lot and developp this code. I 've tryied différents methods for finding the enveloppe (peak method, diff method, hilbert and yours) I have a problem on the diff method that I developped several year ago for my thesis on free reeds acoustics. This was working on matlab but here I get we...

Here I recorded some sound from my accordions with differents 'vibrato' (beating frequency)
I don't know how to convert this on CyThon

https://labodezao.fr/old/share/beat_exemples.wav

I will try to convert this in array

Good !
I will use the i2S script of mike and then grab the i2s mic into the sd card and send it here

Best Regards, and a lot of thanks !

I have also tried this code : import numpy as np import matplotlib.pyplot as plt from scipy.signal import hilbert, chirp duration = 1.0 fs = 400.0 samples = int(fs*duration) t = np.arange(samples) / fs signal = chirp(t, 20.0, t[-1], 100.0) signal *= (1.0 + 0.5 * np.sin(2.0*np.pi*3.0*t) ) analytic_si...

Good !
How to find the fundamental frequency of this output in micropython with a realtime optimization ? i should double it due to absolute value opération right ?
You think I should use a fft ?

Best

Ewen

My application is realtime
I will use a buffer

I never learn assembler at school
I will try to make it with your comments !

In all the case I will need the table with the coefficient right ?

Could I start from this file ?
https://github.com/peterhinch/micropyth ... ter/lpf.py