First tried with my new Board

bfs013 · May 11, 2020, 5:50pm

Hello,

I just received my nano BLE 33 board.
After having set up the Arduino IDE I started to Upload 2 different examples: Blink & Micro-speech.
Both examples were uploaded successful.
The problem is that it does not do anything special:

1 - The blink example just shows the power led (Green).
2 - The micro speech example just showed the Green + White led (Should change the led color when saying "Yes" right?)

Do these samples fit the nano ble 33 board?

Any idea what can be wrong?

Below the log of the upload process:

Sketch uses 145352 bytes (14%) of program storage space. Maximum is 983040 bytes.
Global variables use 76952 bytes (29%) of dynamic memory, leaving 185192 bytes for local variables. Maximum is 262144 bytes.
Device : nRF52840-QIAA
Version : Arduino Bootloader (SAM-BA extended) 2.0 [Arduino:IKXYZ]
Address : 0x0
Pages : 256
Page Size : 4096 bytes
Total Size : 1024KB
Planes : 1
Lock Regions : 0
Locked : none
Security : false
Erase flash

Done in 0.000 seconds
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bfs013 · May 11, 2020, 8:14pm

Ok I can understand why is the micro speech not working. There is no microphone on the boards.
But what about the blink example?

bfs013 · May 13, 2020, 4:46pm

Sorry again but anyone can help here?
Thanks!

pailhoux · May 13, 2020, 6:58pm

Hi
What did you expect ? Blink just blink the green led.

bfs013 · May 13, 2020, 7:03pm

Yes
I expected some led blinking....
But nothing.
By the way I also saw that there is a sample code for the NANO 33 BLE called PDMSerialPlotter:

This example reads audio data from the on-board PDM microphones, and prints
out the samples to the Serial console. The Serial Plotter built into the
Arduino IDE can be used to plot the audio data (Tools -> Serial Plotter)

SO is there a microphone on this board?
If it is the case so the micro -speech example detecting "Yes "should work also...

pailhoux · May 13, 2020, 7:32pm

Could you send us your blink code. Works perfectly on mine.

You can see here the digital microphone. But I never used it.

bfs013 · May 13, 2020, 7:42pm

According to the link you sent me you have the NANO 33 BLE SENSE which has a microphone for sure.

I work with NANO 33 BLE - See the link.

SO it seems that my board does not have a mic.

The code for the blinking is the arduino's one:

/*
This example reads audio data from the on-board PDM microphones, and prints
out the samples to the Serial console. The Serial Plotter built into the
Arduino IDE can be used to plot the audio data (Tools -> Serial Plotter)

Circuit:

Arduino Nano 33 BLE board

This example code is in the public domain.
*/

#include <PDM.h>

// buffer to read samples into, each sample is 16-bits
short sampleBuffer[256];

// number of samples read
volatile int samplesRead;

void setup() {
Serial.begin(9600);
while (!Serial);

// configure the data receive callback
PDM.onReceive(onPDMdata);

// optionally set the gain, defaults to 20
// PDM.setGain(30);

// initialize PDM with:
// - one channel (mono mode)
// - a 16 kHz sample rate
if (!PDM.begin(1, 16000)) {
Serial.println("Failed to start PDM!");
while (1);
}
}

void loop() {
// wait for samples to be read
if (samplesRead) {

// print samples to the serial monitor or plotter
for (int i = 0; i < samplesRead; i++) {
Serial.println(sampleBuffer*);*

}*
// clear the read count*
samplesRead = 0;*
}*
}
void onPDMdata() {
// query the number of bytes available*
int bytesAvailable = PDM.available();*
// read into the sample buffer*
PDM.read(sampleBuffer, bytesAvailable);*
// 16-bit, 2 bytes per sample*
samplesRead = bytesAvailable / 2;*
}
So maybe it is built for the SENSE version of this board.
Right now I am only looking for a code that fits my board
Fabrice

bfs013 · May 14, 2020, 5:34am

Oops sorry. I sent the audio example instead.
Here is the blink sample code:

/*
Blink

Turns an LED on for one second, then off for one second, repeatedly.

Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO
it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN is set to
the correct LED pin independent of which board is used.
If you want to know what pin the on-board LED is connected to on your Arduino
model, check the Technical Specs of your board at:

modified 8 May 2014
by Scott Fitzgerald
modified 2 Sep 2016
by Arturo Guadalupi
modified 8 Sep 2016
by Colby Newman

This example code is in the public domain.

*/

// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_BUILTIN, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}

Regards

gerrikoio · May 14, 2020, 10:01am

The nano 33 BLE actually has 2 LED's, which could be blinked.

One is referred to as LED_BUILTIN (which should be yellow and this is used in the blink example) and the other is LED_PWR (green).

Try swapping the LED_BUILTIN for LED_PWR to see what happens.

bfs013 · May 14, 2020, 11:29am

Thank you I will try that but only once I will make my board work again.

I tried to upload another simple sketch and after that I could not to the board anymore.

I tried the double press button method but it does not work on my board.

I believe I need to open a different post for that issue

If you have some advise concerning this issue I will be please to get it.
Thanks a lot!

bfs013 · May 14, 2020, 11:49am

Ok I succeeded to solve the problem of the USB connection.

Now I tried your test and it is working fine. The green led is now blinking.

SO why does the other led not work?

I know that this led is working since when I upload the micro_speech sample, this led is emitting a strong white color (like a camera flash).

So what can be the problem?

bfs013 · May 16, 2020, 6:44pm

Hello,
I will be pleased if someone from Arduino Support can help here.
Can LED_BUILTIN be used with Nano BLE 33 HW?
Can the yellow/orange LED be burnt?

Thanks for the support.

Fabrice

Klaus_K · May 17, 2020, 3:03am

Both the Arduino Nano 33 BLE and the Arduino Nano 33 BLE Sense have a RGB LED onboard.

Here is a sketch that will blink all LEDs.

void setup()
{
  pinMode( LED_BUILTIN, OUTPUT );
  pinMode( LED_PWR, OUTPUT );
  pinMode( LEDR, OUTPUT );
  pinMode( LEDG, OUTPUT );
  pinMode( LEDB, OUTPUT );

  // Arduino Nano 33 BLE onboard RGB LED are active low
  digitalWrite( LEDR, HIGH );
  digitalWrite( LEDG, HIGH );
  digitalWrite( LEDB, HIGH );
}

void loop()
{
  long r = random( 7 ) + 2;
  blinkLed( r, 80 );
  r = random( 2 );
  blinkLed( r, 80 );
}

void blinkLed( int led, int d )
{
  switch ( led )
  {
    case 0:
      digitalWrite( LED_BUILTIN, HIGH );
      delay( d );
      digitalWrite( LED_BUILTIN, LOW );
      break;
    case 1:
      digitalWrite( LED_PWR, HIGH );
      delay( d );
      digitalWrite( LED_PWR, LOW );
      break;
    case 2:
      digitalWrite( LEDR, LOW );
      delay( d );
      digitalWrite( LEDR, HIGH );
      break;
    case 3:
      digitalWrite( LEDG, LOW );
      delay( d );
      digitalWrite( LEDG, HIGH );
      break;
    case 4:
      digitalWrite( LEDB, LOW );
      delay( d );
      digitalWrite( LEDB, HIGH );
      break;
    case 5:
      digitalWrite( LEDR, LOW );
      digitalWrite( LEDG, LOW );
      delay( d );
      digitalWrite( LEDR, HIGH );
      digitalWrite( LEDG, HIGH );
      break;
    case 6:
      digitalWrite( LEDR, LOW );
      digitalWrite( LEDB, LOW );
      delay( d );
      digitalWrite( LEDR, HIGH );
      digitalWrite( LEDB, HIGH );
      break;
    case 7:
      digitalWrite( LEDB, LOW );
      digitalWrite( LEDG, LOW );
      delay( d );
      digitalWrite( LEDB, HIGH );
      digitalWrite( LEDG, HIGH );
      break;
    default:
      digitalWrite( LEDR, LOW );
      digitalWrite( LEDG, LOW );
      digitalWrite( LEDB, LOW );
      delay( d );
      digitalWrite( LEDR, HIGH );
      digitalWrite( LEDG, HIGH );
      digitalWrite( LEDB, HIGH );
      break;
  }
}

Please note that the RGB LED has active LOW LEDs (see schematic). So, you need to write LOW to switch them ON.

bfs013 · May 17, 2020, 4:17pm

Klaus,
Thank you for your answer.
Using the blink code I succeeded to blink the PWR LED.
But replacing it with LED_BUILTIN does not blink the Yellow led.
I will try your code and update.
Thanks
Fabrice

bfs013 · May 17, 2020, 6:47pm

Hi Klaus,
Thank you for your code.
Actually the whole code works fine apart from the LED_BUILTIN.

I even erased all the code and keeping only the following:

digitalWrite( LED_BUILTIN, HIGH );
delay( d );
digitalWrite( LED_BUILTIN, LOW );

Using that,no LED was blinking.

Is it possible that the definition of LED_BUILTIN is now obsolete?

Fabrice

gerrikoio · May 17, 2020, 7:03pm

No, LED_BUILTIN should work. Sounds like the LED itself is faulty.

bfs013 · May 18, 2020, 7:19pm

Yes probably. This led is near the USB connector right? like the Power LED but the other side?

Klaus_K · May 18, 2020, 8:40pm

bfs013:
Yes probably. This led is near the USB connector right? like the Power LED but the other side?

Yes, that is the one. This is not a software but a hardware issue. The LED can be faulty or maybe placed the wrong way around.

bfs013 · May 18, 2020, 8:41pm

Understood.
Thanks a lot!

ralphhipps · August 28, 2020, 4:43am

I tried it out, works great! All the LEDs are blinking away like mad! I love it.

Thanks!!

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