Ascii text is garbled when Arduino message is displayed in ScripCraft

[sisomm]

So I have managed to send commands from ScriptCraft to an Arduino, and the Arduino responds over the serial port.

I use the mosquitto_pub command listening on the serial port
tail -f /dev/tty.usbserial-A702MUZO | /usr/local/Cellar/mosquitto/1.2.3/bin/mosquitto_pub -t /arduino/1/status -l
And it shows up nicely in the queue with topic /arduino/1/status:
Pin: 13 State: LOW
Pin: 13 State: HIGH
Pin: 13 State: LOW
Pin: 13 State: HIGH

Now, when I subscribe to this in ScriptCraft, Using your the code :

client.subscribe('/arduino/1/status');
.
.
.

client.onMessageArrived(function(topic, message){
// handle incoming messages here.
var bytes = message.payload;
player.sendMessage(bytes);
});

• the text above is totally garbled. How do I convert it to readable text?

Pathetic excuse: I have tried to google it. I know that it is a binary payload, and It should be converted somehow - both from ASCII to UniCode and from byte array to String. This is stretching me a bit, since I don´t know JavaScript and I am quite rusty as a programmer (ten years have gone since I did it professionally)

AND I assume that such a conversion will come in handy for many others, hence could be part of your library

[walterhiggins]

Hi Simen,

You can reconstruct the original string like this...

var bytes = message.payload;
var javaString = new java.lang.String(bytes);
player.sendMessage(javaString);

I'll update the documentation.

[walterhiggins]

... interesting. So you're not using an Arduino wifi or ethernet shield? Your arduino is connected to the usb and you simply want to pipe serial output from the arduino through an mqtt broker? I hadn't thought of that. I'd assumed you were using a network-enabled arduino. Have you considered looking at the RxTx java library? It might also suit your needs.

[sisomm]

The Wifi shield just arrived from china. AND will be used. Have you looked at node.red? It is orchestration on top of mqtt. I discovered it this morning, but haven't tested it

Vennlig hilsen

Simen Sommerfeldt |
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http://www.bouvet.no | simen.sommerfeldt@bouvet.no

On 19. jan. 2014, at 13:10, Walter Higgins notifications@github.com wrote:

... interesting. So you're not using an Arduino wifi or ethernet shield? Your arduino is connected to the usb and you simply want to pipe serial output from the arduino through an mqtt broker? I hadn't thought of that. I'd assumed you were using a network-enabled arduino. Have you considered looking at the RxTx java library? It might also suit your needs.

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