Just throwing a few ideas out there about Serial Ports. Do you think it will ever be possible to Open, Close, or Configure a Serial Port from inside a Running Flow? I am thinking I should be able to Modify that "Configuration Node" of a Serial Port to Change Baud, Stop, Parity. I guess I will try …

a little off-topic, but I recently found that a fresh usb-tty in RPi using NR serial port is NOT binary transparent without adjusting settings in stty outside of NR. had me going for more than a few hours suspecting my firmware at the other end of the link - until I notices that 0x11 & 0x12 incomin…

Hi Guys, Thanks for the feedback. Ignore my End Goal for a second. Do you foresee any reasons of not being able to Open or Close a Serial Port from a Running Flow? If a Serial Port is Closed you should be able to update the Configuration Node of Serial Port. I am not sure how Node Red currently Au…

[image] dano3829: Thanks for the feedback. Ignore my End Goal for a second. Do you foresee any reasons of not being able to Open or Close a Serial Port from a Running Flow? If a Serial Port is Closed you should be able to update the Configuration Node of Serial Port. I am not sure how Node Red …

In theory it could be possible for the config node to close and restart the port. However as config nodes have no dynamic input there is no easy way to set those internal settings. You can use environment variables to set those that are text easily enough - but they only get read when the node is re…

Is anyone up for working together to write this node? I have no experience writing nodes but love node-red for its IOT applications and would love to find a way to help create something useful to the community.

Another aspect to this general question is the need to control the serial device "pins" such as DTR and RTS and to read the CTS state at will. This is a VERY common usage for serial ports in Mil Std. modems in particular. The modem is "keyed" by raising RTS. CTS is used as a hardware flow control…

It is indeed possible to do what you want within node red, it took a bit of messing around, and it's not perfect but it does what you want, with the added bonus of opening and closing the serial port automatically. You have to inject the msg.topic = "flows"; [{"id":"ca9de98e.484218","type":"functi…

It is possible to close the serial port from the flow. you have to modify the 25-serial.js file. All credit to the person in the link that showed how to change the baudrate on the fly (this is a part of the serial.js file) and it doesn't need the port to be closed. Looking at the api for the seria…

I have a system which has serial type barcode readers. It becomes necessary to disconnect Node-RED from the port to allow "ESP" (Microscan Easy Setup Program) to address the device and allow configuration. So, you see we need to allow the port to be accessed by other clients in order to configure…

Serial ports are normally locked when opened and not easily shared. This has already been covered in this thread. Depending on your platform, there are virtual serial ports that may let you share the port. But whether this works for you is highly dependent on the devices, platform and software.

Serial Port Management Features?

General

Fizzo 15 November 2022 12:04 23

There was no reaction on this comment on DTR, RTS, CTS Pins.
I would like to dynamicly change these pins on the fly.
It is very useful, how it is realised with the buadrate (msg.baudrate = 2400) ...
Wouldn´t it be ok to control the pins as well with e.g. mgs.DTR = low / high / auto ... ?

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Serial Port Management Features?

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