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No words.. It is incredible the time that is lost for stupid mistakes :(

Thank you !

Daniele.

Hello guys, I'm trying to read pin status of a mcp23017 in one shot using the Adafruit_mcp23017 library (https://github.com/adafruit/Adafruit-MCP23017-Arduino-Library);

The sketch:



#include...

Hello guys, after almost a year I'm still here..:cool:
Now I'm trying this lib: https://github.com/maxgerhardt/rotary-encoder-over-mcp23017

I've the polling example running fine with 1 encoder....

This sketch: http://www.g7smy.co.uk/2014/08/rotary-encoders-on-the-i2c-bus/ with polling instead of interrupt, works.
So something in interrupt setup is not ok in previous sketch.. :(

Hi, I did all the changes you suggest me, nothing.
I added some debug ouput and if I manually short interruptPin to gnd, the sketch works !
So the problem is on the the mcp side.
13627

I've:...

HI guys, I'm trying to use this sketch: https://github.com/raspibo/I2C_rotary_encoder/blob/master/I2C_rotary_encoder.ino..
First of all, a basic sketch like this:...

What about Keypad library ?

4x4 matrix without additional IC:


/* @file MultiKey.ino
|| @version 1.0
|| @author Mark Stanley
|| @contact mstanley@technologist.com
||

Great !

Test sketch:


String nname[] = {"C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"};
int mname;
int oc;

void setup() {

Hi, how to convert mdi note to note name?

0 ->C0
51 -> D#3
..

First thing that comes to my mind is an big array of string: string name[] ={"C0","C#0,"D0"....}

Are there better...

Ah ok, thanks !

Daniele.

Sorry, my mistake. int32_t enc1_val = 0; needs to be outside setup(), otherwise there's a scope error in loop().

Last question, is there a way to rewrite the encoder value ? Something like...

Thanks ! Example sketch with 4 counts default config works fine !

But I' have some trouble make it working in a real sketch. I would call read() inside loop() but with begin() inside setup(),...

What exactly ? As I wrote, with Encoder lib, I get 4x count (as expected..). Do I need QuadDecode lib from linked thread ?
Or is about polling vs interrupt ?

Thanks,
Daniele.

Hi guys, I want to use few encoders as pot, it's a midi controller so at the end, I need to read 0-127.

Encoders are cheap ALPS.
With the encoder lib, I get 4 values for each step (1 2 3 4 - 5 6...

HI guys, for a simple midithru (serial<->usb), do I need the whole midithru() function posted in this thread or can be semplified ? A very simple "pass everything as is".

Thanks,
Daniele.

Hi, ehm.. ERR_CONNECTION_TIMED_OUT

Daniele.

Right, 5v. So you need 5v for the input part. Not sure about the output.. Do you already have that board ?
Daniele.

Why 5v ? 3.3v is ok for midi output.

Daniele.

Two more questions before start soldering..
Can I get 3.3v from the 5v with voltage divider (47k+91k)? One wire less..
Can I attach a led to show midi activity ? I think that should be ok to attach...

Thanks Paul, works fine with 3.3v.

10259

A bit ugly but it's only for a quick test.

Daniele.

Well my 6n137 is this: 6N137.pdf and is 5v.

So what to do ?

Sorry for these silly questions but I came back to this hobby after 20 years so I need to relearning almost everything :(

Thanks,...

Output done! Used 2 62 ohm resistor 'cause I don't have 0.5w resistor right now..
Tomorrow I'll test the input.
I still don't understand if the 6n137 works with 3.3v. In some datasheet is 4.5-5.5...

I suspected it... asked just to be sure.



The optocoupler 6n137..
I guess the answer ;)

Thanks guys !
Daniele.

Thanks and if may ask, what do you think about this: http://karg-music.blogspot.it/2016/01/midification.html. On midi out there is only 220 ohm resistor to 3.3v and the 6n137 is fed by 3.3v but the...

Hi guys, I'm making a midi interface too and I have a doubt but for the output..
For the midi spec, with 3.3v, there should be a 10ohm 0.25w resistor from UART to pin 5 and 33 ohm 0.5w from v+ to...

Hi guys, first post here so first of all, HELLO ! And sorry for my bad english.

Now, I'm here with Teensy 3.2 and my first Lcd 16x2 with i2c adaptor based on PCF8574AT chip.

So which lib ?...