Search found 2715 matches

by Roberthh
Fri Jun 18, 2021 6:21 am
Forum: Raspberry Pi microcontroller boards
Topic: Play audio file in pi pico
Replies: 5
Views: 523

Re: Play audio file in pi pico

You have to connect the speaker and the capacitor in series between GP2 and GND. Then you may hear some very faint sound. If I see that sample video right, the RP2 was connected to an active speaker with built-in Amplifier. That is the best approach to take.
by Roberthh
Fri Jun 18, 2021 6:18 am
Forum: ESP32 boards
Topic: How to get the full capacity of an 8MB or 16MB flash chip?
Replies: 18
Views: 1615

Re: How to get the full capacity of an 8MB or 16MB flash chip?

That mechanism should still work. Compare it to the setup for the board UM_FEATHERS2
by Roberthh
Fri Jun 18, 2021 5:46 am
Forum: General Discussion and Questions
Topic: Can I use a USB mass storage?
Replies: 7
Views: 169

Re: Can I use a USB mass storage?

The Teensy port of Micropython does not support USB mass storage. I do not know if any port does. There is Circuitpython for Teensy 4.x which supports SD Card, and SD card support for the MP port for Teensy 4.x - or to say better MIMXRT devices - is under construction. It may take a few weeks before...
by Roberthh
Thu Jun 17, 2021 4:21 pm
Forum: General Discussion and Questions
Topic: Implementing SENT Interface in MicroPython?
Replies: 10
Views: 255

Re: Implementing SENT Interface in MicroPython?

I do not expect it to work at that frequency. The time to call a python function on a F407 is about 4 µs.
by Roberthh
Thu Jun 17, 2021 8:17 am
Forum: General Discussion and Questions
Topic: Compile new firmware, UART not available.
Replies: 1
Views: 58

Re: Compile new firmware, UART not available.

UART, SPI and I2C are classes of the machine module. Did you call

from machine import UART

upfront?
by Roberthh
Wed Jun 16, 2021 5:21 pm
Forum: General Discussion and Questions
Topic: [Errno 19] ENODEV
Replies: 10
Views: 148

Re: [Errno 19] ENODEV

If I see the colors right, the rings on the resistor are red red gold gold, This is 2.2 Ohm. 2.2K has the colors red red red gold.
by Roberthh
Wed Jun 16, 2021 5:05 pm
Forum: General Discussion and Questions
Topic: [Errno 19] ENODEV
Replies: 10
Views: 148

Re: [Errno 19] ENODEV

Whar are the values of the resistors you've added? What are the colors? And it seems that on the HM5883 breakout there are resistors too.
by Roberthh
Wed Jun 16, 2021 4:36 pm
Forum: General Discussion and Questions
Topic: [Errno 19] ENODEV
Replies: 10
Views: 148

Re: [Errno 19] ENODEV

No. Address pointer refers to the register stack of the HMC5883L. The picture is hard to read, especially the numbers of the board. But it looks like you swapped SDA and SCL.
by Roberthh
Wed Jun 16, 2021 3:38 pm
Forum: General Discussion and Questions
Topic: [Errno 19] ENODEV
Replies: 10
Views: 148

Re: [Errno 19] ENODEV

If the returned list is empty then there is a connection problem. It should show the I2C address of the device, 0x3c or 60 decimal. Please check, that you connected SDA, SCL, GND and Vcc properly.