Error while opening serial port under Windows

[gozzoo]

• SerialPort Version: 6.0.0-beta2
• NodeJS Version: 7.9.0 (Electron 1.8.1)
• Operating System and Hardware Platform: Windows 7 32 bit

Summary of Problem

I get this error when trying to open existing but not connected port:

Error: Open (SetCommState): Unknown error code 87

Steps and Code to Reproduce the Issue

Here is my code:

var baudRate = 0;
SerialPort = require('serialport');
let conf = { baudRate }
let port = new SerialPort('COM1', conf)

var Readline = SerialPort.parsers.Readline;
const parser = new Readline();
port.pipe(parser)
parser.on('data', (data) => {
	console.log(data)    
}) 
port.on('error', err =>  console.error(t.port + ' error: ', err))

[reconbot]

Does it work in node?

…

On Sat, Oct 7, 2017, 10:50 AM Evgeni Milev ***@***.***> wrote: - *SerialPort Version*: 6.0.0-beta2 - *NodeJS Version*: 7.9.0 (Electron 1.8.1) - *Operating System* and *Hardware Platform*: Windows 7 - Have you checked the right *version* of the *api docs?*: yes - Are you having trouble installing and you checked the *Installation Special Cases* docs? yes - Are you using *Electron* and have you checked the *Electron Docs*?: yes Summary of Problem I get this error when trying to open existing but not connected port: Error: Open (SetCommState): Unknown error code 87 Steps and Code to Reproduce the Issue Here is my code: let port = 'COM1' let conf = { baudRate: Number(speed) } port = new SerialPort(port, conf) const parser = new Readline(); port.pipe(parser) parser.on('data', (data) => { console.log(data) }) port.on('error', err => console.error(t.port + ' error: ', err)) — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#1353>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AABlbmqUO8iUtBNfKTcosQrgrnCa2tYcks5sp4-0gaJpZM4PxX5G> .

[gozzoo]

It works fine with node 8.6.0 (latest). I'll downgrade node to the version of Electron and I'll try again.

[gozzoo]

It also works fine with node 7.9.0

What's interesting tough is that with serialport 5.0.0 my program hangs, and with 6.0.0-beta2 it exists immediately. I don't know if this is related to the error I'm getting with Electron.

[gozzoo]

I reproduced the problem with all node versions. I was pasing 0 as baudRate. I don't know if 0 is a valid value but 'error code 87' is not a very clear error message.

[reconbot]

It appears that the c++ code is running ok, the open error SetCommState has to do with configuring the ports setting and baudrate... A baudrate of 0 is not valid however.

[reconbot]

It's what the OS gives us ¯\_(ツ)_/¯

…

On Sat, Oct 7, 2017, 4:52 PM Evgeni Milev ***@***.***> wrote: I reproduced the problem with all node versions. I was pasing 0 as baudRate. I don't know if 0 is a valid value but 'error code 87' is not a very clear error message. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#1353 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AABlblMEcfPqq9R7gGhOBJYHPHuJyx2yks5sp-SLgaJpZM4PxX5G> .

[reconbot]

I would 100% take a pr that throws on this error, if it hit you it has hit others too.

…

On Sat, Oct 7, 2017, 5:33 PM Francis Gulotta ***@***.***> wrote: It's what the OS gives us ¯\_(ツ)_/¯ On Sat, Oct 7, 2017, 4:52 PM Evgeni Milev ***@***.***> wrote: > I reproduced the problem with all node versions. I was pasing 0 as > baudRate. I don't know if 0 is a valid value but 'error code 87' is not > a very clear error message. > > — > You are receiving this because you commented. > Reply to this email directly, view it on GitHub > <#1353 (comment)>, > or mute the thread > <https://github.com/notifications/unsubscribe-auth/AABlblMEcfPqq9R7gGhOBJYHPHuJyx2yks5sp-SLgaJpZM4PxX5G> > . >

[reconbot]

Thanks for the patch @gozzoo!