Bluetooth "when connected" command?

[espruino-discuss3]

Posted at 2017-02-09 by BootySnorkeler

Hi,
I'm planning to make a datalogger with my espruino with a dht11 sensor.
I want to make it so that If I connect my mac to my espruino via bluetooth, which will be on my windowsill, the espruino will send me all the logged data through a text file.
Is this possible?
Is there a command/keyword that triggers when bluetooth is connected?
Also a command for sending files by bluetooth?
I checked the reference page but I can't find any.
Thanks!
by the way here's my code so far:

//Offline weather data logger for the Espruino Javascript microcontroller
//DHT11 sensor connected to pin c11
//Made by Eric Min - NO STEALING SOURCE CODE! IF YOU DO SO PLEASE CREDIT ME!!

var dht = require("DHT11").connect(c11); // requires the DHT11 module for temperature/humidity logging
var files = require("fs").readdirSync(); // requires the Filesystem module for reading, writing, and storing files
var f = E.openFile("log.txt","w");      // sets variable for file IO library
var x = 1;

function readTemp() {
    dht.read(function (a) {
        f.write(a.temp.toString() + a.rh.toString());

    });
}

function logTemperature() {
        dht.read(function (a) {
          f.write(a.temp.toString()+a.rh.toString());
        });
}

function logAtIntervals() {
  setInterval(logTemperature, 1800000);
  x++;
}

if (x <= 24) {
  console.log("Logging done!");
  f.write("Logging done! Entering sleep mode, good night!");
  f.close("log.txt");
}


logAtIntervals();

yeah I'm a noob so please point out any errors in my code please!

[espruino-discuss3]

Posted at 2017-02-09 by @gfwilliams

So this is an Original Espruino board with Bluetooth installed?

I'm afraid the bluetooth module (HC-05 / HC-06) acts as a simple serial port - so there's no file transfer or even connected/disconnected event.

You'd have to add a bit of software on the Mac to receive the file. It shouldn't be too bad for example if you have it send the string "\x10sendFile();\n" then it will silently call the sendFile function, which could send the contents.

You can then make a sendfile function on Espruino -something like:

function sendFile() {
var f = E.openFile('log.txt','r');
var d = f.read(100);
while (d!==undefined) {
  Serial1.write(d);
  d = f.read(100);
}
f.close();
Serial1.println("<<EOF>>");
}

Then your code only has to write everything it receives to a file until it gets the characters <<EOF>>

---

Posted at 2017-02-09 by BootySnorkeler

Thanks!
Wait then what is the bluetooth module for?
can I connect to my board by bluetooth and open up espruino(or screen/picocom/minicom) and program it wirelessly?

---

Posted at 2017-02-10 by @gfwilliams

can I connect to my board by bluetooth and open up espruino(or screen/picocom/minicom) and program it wirelessly?

Yes, that's the idea.

You can move the Espruino console away from Serial1 and use it directly to read and write individual bytes - but keeping the console on there is easier, and if there were some kind of error it'd get reported back to you over Bluetooth as well.