MicroPython Forum (Archive)

I've made this test with adc pin 32 not connected to anything (floating in the air)

with the default sensitivity 0DB attenuation, and I get a quite nice 50Hz sin wave.

Quite interesting EMC show case...

Hi thalesmaoa, I know you have switched from esp32 to Pyb. But just in case here under is a hack from Roberth to poll pin at max speed on ESP32 Original topic : https://forum.micropython.org/viewtopic.php?f=18&t=8791&start=10 from machine import Pin, ADC import machine import time from array import ...

@pythoncoder do you have some specific binary counter ref in mind ?

On my side I have investigate and found: NXP - PCF8593 with i2c interface

Thanks for sharing this mcauser, Could this device can be used to count pulses ? I'm searching a work around to the lack of pulse counter support for ESP32. (in official firmware at least) I understand that shift register device can be used to do exactly that, am I right ? Do you know if 74HC595 can...

Ok, so it may be a good idea to mention in the doc that this function is not included in the firmware, isn't it?
I will create an issue on github.

Thank's Stijn,

So if understand it right this statement in the doc : "This function is a MicroPython extension" mean that this function is not included in the firmware right ?

Hello, In the doc: http://docs.micropython.org/en/latest/library/usys.html I found information about the sys.atexit() function but I'm not able to import it with the latest firmware: MicroPython v1.15 on 2021-04-29; ESP32 module with ESP32 Type "help()" for more information. >>> from usys import ate...

Thanks

Thanks for your answer Roberthh,



According to the 2n7000 specification, how should I wire it ?

1: Source -> ground
2: Gate -> Esp32 pin (set as an output 0 or 3.3v)
3: Drain -> switch pin

Hello, I have a device with momentary switches, this device is powered with 0/+5V. I would like to simulate switch press with external mcu : ESP32 I know that esp32 pins can be configured in open drain mode to simulate a switch, but has the device to control is powered with grater voltage than esp32...