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Looking to Echo Serial 0 to Serial 2 - Marlin 1.X

distantkitty

Looking to Echo Serial 0 to Serial 2 - Marlin 1.X
June 09, 2020 01:34PM

Registered: 7 years ago
Posts: 7

Hello,

I'm looking to control my printer via USB with a host program, but I would also like to read values over serial on a second device. More specifically, I would like to parse an M114 command for axis position data.

I have added #define SERIAL_PORT_2 2 in Marlin, but curious how to echo all the data to this port as well.

Thanks!

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Dust

Re: Looking to Echo Serial 0 to Serial 2 - Marlin 1.X
June 09, 2020 09:28PM

Admin
Registered: 13 years ago
Posts: 7,005

This is not a standard feature...

Its a communication channel, its responds to commands sent on the channel. To get responses on port_2 you need to send commands on port_2...

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distantkitty

Re: Looking to Echo Serial 0 to Serial 2 - Marlin 1.X
June 09, 2020 09:44PM

Registered: 7 years ago
Posts: 7

I have been able to successfully open two ports simultaneously and each has display the typical preamble such as build dates and such.

If I start a toolpath on port 0 from the host, my port 2 call of M114, still shows X0 Y0 Z0 E0, which is not indicative of what the coordinates are from the host connection.

I'm not using the LCD, do you know of a way to redirect the lcd print to serial 2?

Thanks!