Puck.js Connect to Adafruit Feather Board

Lots of progress - thank you both for your patience and guidance!!! In the process, I'm learning a lot about the environments (BLE, Aurduino, and Espruino).

I have the Puck and the Feather talking to each other!!! I'm not sure EXACTLY what made it happen, but I'll go with it

Here is what I have on the Puck that works.

var feather = "ff:8d:05:ae:17:64 random";

// Blink green for 100ms
function blinkGreen() {
  LED2.write(true);
  setTimeout(function () { LED2.write(false); }, 100);
}

// Function to send a message
function sendMessage() {
  console.log("Trying to Connect");

  NRF.requestDevice({ filters: [{ id: feather }], active:true }).then(function(device) {
    print(device);
    return require("ble_simple_uart").write(device,­ "true");
  }).then(function() {
    console.log('Done!');
  });
}

// Send a message when the button is pressed
setWatch(function() {
  blinkGreen();
  sendMessage();
}, BTN, { edge: "rising", debounce: 50, repeat: true });

Here is what I have on the Feather. I am able to read the serial and then I have an if statement to check the value and if it matches then it triggers another function. This is just a simple example to test it, but it works.

[#include](https://forum.espruino.com/se­arch/?q=%23include) <Arduino.h>
[#include](https://forum.espruino.com/se­arch/?q=%23include) <SPI.h>
[#include](https://forum.espruino.com/se­arch/?q=%23include) "Adafruit_BLE.h"
[#include](https://forum.espruino.com/se­arch/?q=%23include) "Adafruit_BluefruitLE_SPI.h"
[#include](https://forum.espruino.com/se­arch/?q=%23include) "Adafruit_BluefruitLE_UART.h"

[#include](https://forum.espruino.com/se­arch/?q=%23include) "BluefruitConfig.h"

[#if](https://forum.espruino.com/search/­?q=%23if) SOFTWARE_SERIAL_AVAILABLE
  [#include](https://forum.espruino.com/se­arch/?q=%23include) <SoftwareSerial.h>
[#endif](https://forum.espruino.com/sear­ch/?q=%23endif)

/*======================================­===================================
    ----------------------------------------­-------------------------------*/
    [#define](https://forum.espruino.com/sea­rch/?q=%23define) FACTORYRESET_ENABLE         1
    [#define](https://forum.espruino.com/sea­rch/?q=%23define) MINIMUM_FIRMWARE_VERSION    "0.6.6"
    [#define](https://forum.espruino.com/sea­rch/?q=%23define) MODE_LED_BEHAVIOUR          "MODE"
    [#define](https://forum.espruino.com/sea­rch/?q=%23define) LED_BUILTIN                 13
/*======================================­===================================*/

Adafruit_BluefruitLE_SPI ble(BLUEFRUIT_SPI_CS, BLUEFRUIT_SPI_IRQ, BLUEFRUIT_SPI_RST);

// A small helper
void error(const __FlashStringHelper*err) {
  Serial.println(err);
  while (1);
}

/***************************************­***********************************/
/*!
    @brief  Sets up the HW an the BLE module (this function is called
            automatically on startup)
*/
/***************************************­***********************************/

int incomingByte = 0; // for incoming serial data
String readString;

void testFunction(){
  Serial.println(F("if statement worked"));
}

void setup() {
  // Start the hardware serial communication at 9600 baud rate
  Serial.begin(115200); // Serial Monitor
  Serial1.begin(115200); // UART Communication (Replace Serial1 with appropriate Serial for your Feather)

  /* Initialise the module */
  Serial.print(F("Initialising the Splitz Start Beacon"));
  Serial.println(F("----------------------­-----------------"));

  if ( !ble.begin(VERBOSE_MODE) ){
    error(F("Couldn't find Bluefruit, make sure it's in CoMmanD mode & check wiring?"));
  }
  Serial.println( F("OK!") );

  if ( FACTORYRESET_ENABLE ){
    /* Perform a factory reset to make sure everything is in a known state */
    Serial.println(F("Performing a factory reset: "));
    if ( ! ble.factoryReset() ){
      error(F("Couldn't factory reset"));
    }
  }

  /* Disable command echo from Bluefruit */
  ble.echo(false);

  Serial.println("Requesting Bluefruit info:");
  /* Print Bluefruit information */
  ble.info();
  Serial.println();

  ble.verbose(false);  // debug info is a little annoying after this point!

  /* Change the device name to make it easier to find */
  Serial.println(F("Setting device name to 'Splitz Start Beacon'"));
  if (!ble.sendCommandCheckOK(F("AT+GAPDEVNAM­E=Splitz Start Beacon"))) {
    error(F("Could not set device name?"));
  }

  // Set module to DATA mode
  Serial.println( F("Switching to DATA mode!") );
  ble.setMode(BLUEFRUIT_MODE_DATA);

  /* Wait for connection */
  while (! ble.isConnected()) {
      delay(500);
  }

  if(ble.isConnected()){
    Serial.println(F("Device is connected."));
  }

  pinMode(13, OUTPUT); // Optional: Use the built-in LED to indicate received data
}

void loop() {
  // Echo received data
  while ( ble.available() )
  {
    char c = ble.read();
    readString += c; //makes the String readString
    delay(3);  //slow looping to allow buffer to fill with next character
  } 

  if (readString.length() > 0) {
    Serial.println(readString);  //so you can see the captured String
    if (readString == "true"){
      testFunction();
    }
    readString = "";
  }
}

The only issue is that it disconnects after it sends the info. How would I be able to persist the connection?

I tried the below. It connects to the board but doesn't write to the serial like "requestDevice " did.

  NRF.connect(feather).then(function(d){
    print(d);
    return require("ble_simple_uart").write(d, "true");
  }).then(function() {
    console.log('Done!');
  });