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Hello,
I'm trying to get Bluetooth working on an ESP32 but running into a problem.

When I run

ESP32.enableBLE(true);

I see an error like below. Not sure what it means.

https://imgur.com/yjQ38EY

In the IDE I tried running the below code

NRF.setServices({
  "3e440001-f5bb-357d-719d-179272e4d4d9": {
    "3e440002-f5bb-357d-719d-179272e4d4d9": {
      value : [0],
      maxLen : 1,
      writable : true,
      onWrite : function(evt) {
        // When the characteristic is written, raise flag
        print(evt);
      }
    }
  }
});

  NRF.setAdvertising({}, {name:"Flag"});

The code uploads and I'm can connect to the device using NRF Connect app. However, when I try to send a value I get the below error

https://imgur.com/yjQ38EY

Please let me know what I'm doing wrong.

Code formatting will be really awesome to have.

Thanks a lot @Gordon and @Wilberforce. I have tried the new code. Good news is that I no longer get "Guru Meditation error", but I get data like below.

I understand that DHT11 now works for @Gustav on ESP32. There is as much time that you guys can spend on this, I have read that DHT11 is not the best sensor as well. I am pretty sure this works flawlessly on the official boards. I'll try to get myself one.

Thanks a lot for all the help. Really appreciate it.

{"err":true,"checksumError":true,"raw":"­101010100110000000000010111000","temp":-­1,"rh":-1}
{"err":true,"checksumError":false,"raw":­"","temp":-1,"rh":-1}
{"err":true,"checksumError":true,"raw":"­1010101001100000000000101110000000001101­0101","temp":-1,"rh":-1}
{"err":true,"checksumError":false,"raw":­"0","temp":-1,"rh":-1}
{"err":true,"checksumError":false,"raw":­"0","temp":-1,"rh":-1}
{"raw":"01010100110000000000010111000000­00011010101","rh":83,"temp":23}
{"err":true,"checksumError":false,"raw":­"","temp":-1,"rh":-1}
{"err":true,"checksumError":false,"raw":­"0","temp":-1,"rh":-1}
{"err":true,"checksumError":true,"raw":"­1010101001000000000000101110000","temp":­-1,"rh":-1}
{"err":true,"checksumError":false,"raw":­"0","temp":-1,"rh":-1}
{"err":true,"checksumError":false,"raw":­"","temp":-1,"rh":-1}
{"err":true,"checksumError":false,"raw":­"","temp":-1,"rh":-1}
{"raw":"10101010010000000000001011100000­000011010011","rh":169,"temp":11}

Thanks for your reply. I have already tried pin D16 (comment #7) and I get an error "Guru Meditation Error of type IllegalInstruction occurred on core 0".

I am powering DHT11 with 5 volts.

I believe I have confused you, sorry. I am using an external DHT11(not integrated with ESP32), but I get the same error as the other person(with integrated DHT11) if I connect DHT11 to Pin 22.

Hello,
I originally had a 10k pull-up resistor between the Data and Vcc pins. I have now tried 1K resistor but that has not helped either.

Interestingly, I have observed that I either get No data or a "Guru Meditation Error of type IllegalInstruction occurred on core 0. Exception was unhandled." based on which pin I choose.

e.g.

    pin 15 - {"temp":-1,"rh":-1}
    pin 22 - Guru Meditation Error of type IllegalInstruction occurred on core  0
    pin 16 - Guru Meditation Error of type IllegalInstruction occurred on core  0

I think this person is facing the same issue. http://forum.espruino.com/conversations/­316936/

Thanks a lot.

Thanks for the reply. Much appreciated.

I am using 1v95 firmware. I have also downloaded the latest "espruino_1v95_esp32.bin" from http://www.espruino.com/binaries/travis/­master/
but no success.

Hello,
I am trying to get DHT11(temperature and humidity) sensor working with Espruino on ESP32. I get the below output, which as per the documentation means no data is being received.

{"err":true,"checksumError":false,"raw":­"","temp":-1,"rh":-1}

Code

var dht = require("DHT11").connect(D17);

function onInit() {
    setInterval(function () {
        dht.read(function (a) {
            console.log(JSON.stringify(a));
        });
    }, 3000);
}

onInit();

Interestingly, with the same wiring DHT11 works fine using "Arduino core for ESP32". Not sure what I am doing wrong in the Espruino.

This is the board that I am using https://wiki.wemos.cc/products:lolin32:l­olin32
Pin out - https://arduino-projekte.info/wp-content­/uploads/2017/07/lolin32_pinout.png

Thanks in advance.

You are right, I was unnecessarily complicating things. Thanks a lot for your suggestion @DrAzzy

This is what I have got now

let ledBrightness = 0;
let ledPin = D15;
let fadeIn = false;

function fadeLED() {
 if((ledBrightness <= 0) || (ledBrightness >= 1)){
   fadeIn = !fadeIn;
 }
  
  setLedBrightness(fadeIn);

}

function setLedBrightness(fadeIn){
    if(fadeIn){
    ledBrightness += 0.01;
  }
  else {
    ledBrightness -=0.01;
  }
  
  analogWrite(ledPin, ledBrightness);
}

setInterval(fadeLED , 10);

I have got it to work(sort of), but I am not happy with it. It feels like there is/should be a better way to do it than below.

While googling I found this jhonny-five example, which is quite nice. https://github.com/rwaldron/johnny-five/­blob/master/docs/led-fade.md

A LED class might make it easier for a beginner like me to start with Espruino. In all, loving Espruino so far. Need to learn Javascript to fully appreciate it though.

/* This example works by dividing 1 second into 10 ms time intervals and increasing/decreasing the led's analogWrite output by .01 per interval, to produce the fade-in and fade-out effects.
*/

var ledPower =0;
var ledPin = D15;

function fadeIn(callback){
  //start fadeIn effect should take 1 second to finish.
    var result = setInterval(function(){
      analogWrite(ledPin, ledPower);
      ledPower+= 0.01;
       if(ledPower >= 1){
        clearInterval(result);
        return;
      }
  }, 10);
  
  //set the fade-out effect to start after 1 second.
  setTimeout(callback, 1000);
}

function fadeOut(){
    var result = setInterval(function(){
      analogWrite(ledPin, ledPower);
      ledPower-= 0.01;
       if(ledPower <= 0){
        clearInterval(result);
        return;
      }
  }, 10);
}


setInterval(function(){
  fadeIn(fadeOut);
} , 2000);

Hello,
I am new to Espruino and Javascript and am struggling with the asynchronous nature of it. For my first shot at Espruino, I tried to fade in and out an LED. I have done this before in Arduino, but struggling here. What's the best way to do it?

Here is what I did, but I realize this is wrong as both the fadeIn and fadeOut methods a running in parallel. Thanks in advance.

var ledPower = 0;
var ledPin = D15;

function fadeIn(){
    var result = setInterval(function(){
      if(ledPower >= 1){
        clearInterval(result);
      }
      ledPower+= 0.001;
      analogWrite(ledPin, ledPower);
  }, 50);
}

function fadeOut(){
   result = setInterval(function(){
      if(ledPower <= 0){
        clearInterval(result);
      }
      ledPower-= 0.001;
      analogWrite(ledPin, ledPower);
  }, 50);
}

while(true){
  ledPower =0;
  fadeIn();
  fadeOut();
}