How to processing the data retured from the serial port?

junwei...@gmail.com

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Feb 9, 2017, 11:16:38 PM2/9/17

to qz-print

I want to test the serial communication from the tutorial here (https://qz.io/wiki/2.0-serial-communication#process-results), but I don't know how to display the data retured from the serial port on the web page. Could you please give me some guidance? THS!!

Tres Finocchiaro

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Feb 10, 2017, 12:49:42 AM2/10/17

to junwei...@gmail.com, qz-print

If it's logging to the console properly, you simply have to update the webpage with more JavaScript and would make this is more of a JS/HTML question than a QZ Tray question...

  qz.serial.setSerialCallbacks(function(evt) {
    if (evt.type !== 'ERROR') {
       console.log('Serial', evt.portName, 'received output', evt.output);
+      document.getElementById("field").value="whatever you want here";
    } else {
       console.error(evt.exception);
    }
  });
  // ...
+ </script>
+ <body>
+ <input type="text" id="field">
+ <!-- etc...

- Tres.Fin...@gmail.com

On Thu, Feb 9, 2017 at 11:16 PM, <junwei...@gmail.com> wrote:

I want to test the serial communication from the tutorial here (https://qz.io/wiki/2.0-serial-communication#process-results), but I don't know how to display the data retured from the serial port on the web page. Could you please give me some guidance? THS!!

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bryan martinez

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Nov 20, 2023, 3:39:57 PM11/20/23

to qz-print

Hi, I am trying to return the callback information by using qz.serial.sendData, but the responses give me undefained

qz.serial.setSerialCallbacks(function (streamEvent) {
if (streamEvent.type !== 'ERROR') {
console.log('Serial', streamEvent.portName, 'received output', streamEvent.output);
if (streamEvent.portName == 'COM6') {
datosHex = stringToHex(streamEvent.output);
console.log('Datos en hexadecimal:', datosHex);
} else if (streamEvent.portName == 'COM3') {
datosHex = stringToHex(streamEvent.output);
console.log('Datos en hexadecimal:', datosHex);

}

return streamEvent.portName

} else {
console.log(streamEvent.exception);

}
});

In the callback I actually have the answer but I don't know how I can return that answer from my sendHexa function, can you help me?. thank you

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Tres Finocchiaro

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Nov 20, 2023, 5:11:40 PM11/20/23

to bryan martinez, qz-print

I don't know how I can return that answer from my sendHexa function

I do not see your sendHexa function, but I believe this is more of a question about asynchronous programming, right?

I believe one of the rx parameters start/end, width, untilNewline are required otherwise the callback won't know how often to fire.

Tres Finocchiaro

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Nov 22, 2023, 10:32:21 AM11/22/23

to bryan martinez, qz-print

+qz-print

I wanted to know if that response can be consulted when I invoke the sinHexa() function

Not easily, it would require some type of promise resolver or global callback.

- Tres.Fin...@gmail.com

On Wed, Nov 22, 2023 at 9:57 AM bryan martinez <braya.na...@gmail.com> wrote:

Hello, thank you very much for answering me. this is my sendHexa function function sendHexa(cmdHexa, port, rx) {

let properties = {};
if (!rx) {
rx = {
encoding: 'ISO-8859-1',
start: null,
end: null,
width: null,
lengthBytes: null,
crcBytes: null,

until new line: false
};
}

if (port == 'COM6') {
properties = {
Baud rate: 9600,
data bits: 8.
stop bits: 1,
parity: 'NONE',
Flow control: 'NONE',
rx: rx
};
}

if (port == 'COM3') {
properties = {
Baud rate: 9600,
data bits: 7.
stop bits: 1,
parity: 'EVEN',
Flow control: 'NONE',

rx: rx
};
}

let serialData = {

type: 'hexadecimal',
data: cmdHexa
};

constant data = qz.serial.sendData(port, serialData, properties)
.then(answer => {
console.log('Data sent successfully:', response);

})
.catch(error => {
console.error('Error sending serial data:', error);
reject(error);
});

}

in the "rx" parameter I am sending the rx object with the desired response length, if I consult the response from qz.serial.setSerialCallbacks(function (streamEvent) {

if (streamEvent.type !== 'ERROR') {

console.log(streamEvent.output);

} else {
console.log(streamEvent.exception);

}
});

In streamEvent.output the response from my device arrives, however I wanted to know if that response can be consulted when I invoke the sinHexa() function

thank you

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