Node-RED Controller

Hi Matt.

I'm looking for way to control my DMX decoder using RS485 hat on Rpi. I'd love to control it in Node-RED environment.
Shield's manufacturer supplied a sample python code, sending a simple test string over RS485, and it works, but I'm wandering how can I modify this code, making it send DMX frames. Maybe you could give me some tips how to do it, because unfortunately, I don't know python.

Here is the code which I've simplified a little bit, and original one in the link below.

import serial
import os
import sys
import logging

logging.basicConfig(level=logging.INFO)
libdir = os.path.join(os.path.dirname(os.path.dirname(os.path.realpath(file))), 'lib')
if os.path.exists(libdir):
sys.path.append(libdir)

import RPi.GPIO as GPIO
import time
from waveshare_2_CH_RS485_HAT import config

TXDEN_1 = 27
TXDEN_2 = 22

ser = config.config(dev = "/dev/ttySC0")
data = ''
GPIO.output(TXDEN_1, GPIO.LOW)
ser.Uart_SendString('Waveshare 2-CH RS485 HAT\r\n')
time.sleep(0.005)#Waiting to send
GPIO.output(TXDEN_1, GPIO.HIGH)

https://www.waveshare.com/wiki/2-CH_RS485_HAT

Regards,
Paweł

L’issue fournit un exemple Python utilisant RPi.GPIO, serial et waveshare_2_CH_RS485_HAT.config avec /dev/ttySC0 ; commencez par lire cet extrait et le wiki Waveshare lié. Clarifiez l’intégration Node-RED prévue et les exigences des trames DMX avant de choisir un point d’entrée. Le travail sera considéré comme terminé lorsqu’il existera un moyen documenté ou testé d’envoyer des trames DMX via le RS485 HAT depuis Node-RED.