[solved] hc-05 (no data by using jumper-wires)

Hello,

I've bought a HC-05 Für Arduino hp and the connection to my Blueterm-App (Android) and also to my Debian-Linux-PC (over Blueman or commandline) were successfull.

So I wanted to try out the tutorial http://www.espruino.com/Project+7. Instead of soldering the Bluetooth-module to the Espruino-Board, I wanted to plug it in with some jumper wires, as other connections are possible according to http://www.espruino.com/Wiring+Up.

My connection is:

HC-05 : Espruino
GND : GND
3.3 : 3.3
TXD : B7
RXD : B6

My problem is, I can't receive any data over the connection.

I tried out the following script, I found in the forum:

function onInit() { Serial1.setup(9600);}
Serial1.onData(function (e) {  print("--->"+e.data); });
setInterval(function() {
  Serial1.println("Hello");
}, 1000);

I would be glad, if somebody could help me!

Stefan

Can you try connecting to A9 and A10? Those are the pins that are suggested in http://www.espruino.com/Wiring+Up - it's the default location for Serial1...

Serial1.setup(9600) will not enable Serial1 on pins B7, B6. As Gordon said, Serial1 defaults to being on A9 and A10.

Serial1.setup(9600,{tx:B6,rx:B7}); should move the serial port to those pins - or you can switch your wires to A9/A10.

Hello Gordon and DrAzzy,

you're great! Both solution work well for me! In fact the "Serial1.setup(9600,{tx:B6,rx:B7}); " solution is more clear for somebody, who don't know the default pins. Perhaps this can be integrated in the http://www.espruino.com/Reference#Serial­ Reference (which I find very useful).

Many thanks for this quick answer!

Stefan

Nice! Glad it's working.

You should always specify the pins for uart/i2c/spi/etc before you try to use the interface in question. I think in most cases (certainly in some), the interfaces are not pointed at any pins by default (and/or the pins aren't pointed at the interfaces) until you call setup and specify pins.

Hi Stefan, thanks! I'll update the Serial.setup docs to mention default pins.

Yes, specifying the pins is much easier - however Serial1 is automatically initialised on A9/10, and if there is no USB connection then Espruino automatically moves the 'console' over to it. That means that if you plug the device into a USB charger or a battery, you'll be able to program Espruino wirelessly by bluetooth.

You can still do that on B6/B7 (with Serial.setup) - it's just that A9/10 is the default and for that, Serial1.setup is not needed at all.