Arduino Nano 33 ble sense separate RGB LED does not work

Official Hardware Nano Family Nano 33 BLE Sense
1

I'm trying to connect separate RGB Led to my board. I use ports 7,9 and 11 for R,G and B colors. At the beginning I checked this led with multimeter and all works well, the Led is not broken. Then I soldered GND port to my led and red color via resistor (capacity 220). And used such sample:

import machine
import time

led = machine.Pin(7, machine.Pin.OUT)
while True:
    led.value(1)
    time.sleep_ms(100)
    led.value(0)
    
    time.sleep_ms(500)
    led.value(1)
    time.sleep_ms(100)
    led.value(0)
    time.sleep_ms(200)
    led.value(1)
    time.sleep_ms(100)
    led.value(0)

and nothing works :frowning: I thought maybe I have to use 3.3V port instead, but also does not work. I thought that maybe I overheated led, but multimeter broke this hypothesis. I'm little bit confused, because I tried both variants of power and none of them works, that is little bit strange.

2

Thanks for posting the code properly. Looking at the schematic you did not post I will take a SWAG and say the LEDs have the opposite polarity then what you are wiring for.

3

Thank you for your reply, I don't know how it's works, but I returned C++ bootloader. And then with similar sketch all works well. The polarity is ok, I checked it several times. I'm little bit confused that microPython can not support full functionality of C++ in context of development. Maybe you have some ideas why does it happen?

4

Please post that sketch.

5

That code you posted is written in Python, are you running Python on your Nano 33 Ble?

6 
#define RED 9
#define BLU 11
#define GRN 7

int pause = 1000;

void setup() {
   pinMode(RED, OUTPUT);
   pinMode(BLU, OUTPUT);
   pinMode(GRN, OUTPUT);
}

void loop() {
   digitalWrite(RED, LOW);
   digitalWrite(BLU, HIGH);
   digitalWrite(GRN, HIGH);
   delay(pause);

   digitalWrite(RED, HIGH);
   digitalWrite(BLU, LOW);
   digitalWrite(GRN, HIGH);
   delay(pause);

   digitalWrite(RED, HIGH);
   digitalWrite(BLU, HIGH);
   digitalWrite(GRN, LOW);
   delay(pause);

   digitalWrite(RED, HIGH);
   digitalWrite(BLU, HIGH);
   digitalWrite(GRN, HIGH);
   delay(pause);
}
7

The code in my question and the arduino on the moment of this question creation was written in python, then I returned back C++ bootloader and tried C++ sketch which worked well not like python sketch what I can not understand

8

Your C++ and Python sketches are not quite the same. Your Python code changes only one pin (7) where the C++ code changes 3 pins (7, 9, 11). Also the timing is different, in the C++ code, all the delays are 1000ms but in the Python code they are different lengths and some are only a brief flash.

Are you sure you connected the led to the correct pin when running the Python code?

9

microPython and C++ are different languages as is German and English, not everything translates the same.

10

Pins are correct, I agree that these sketches are not the same, but general logic I think you will agree that work with pins. I can do similar like python on C++ but it will work not as with python. It's not very obvious for me why... :smiley:

11

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