RS485

Example

from m5stack import *
from m5ui import *
from uiflow import *
import time
import unit

setScreenColor(0x222222)
RS485_0 = unit.get(unit.RS485, unit.PORTC)

RS485_0.init(1, baudrate=9600, data_bits=8, stop_bits=1, parity=None, ctrl_pin=None)
while True:
  RS485_0.write('Hello M5Stack')
  print((str('Msg:') + str((RS485_0.read()))))
  wait(1)
  wait_ms(2)

API

RS485_0.init(1, baudrate=9600, data_bits=8, stop_bits=1, parity=None, ctrl_pin=None)

• Initialize RS485 Unit
  • UART:1/2
  • Baudrate:value
  • Data Bits:7/8/9
  • Stop Bits:1/2
  • Parity:None/Even/Odd
  • Ctrl pin

print(RS485_0.any())

• Retrieve Buffer

print(RS485_0.read())

• Retrieve All Received Data

print(RS485_0.readline())

• Retrieve One Line of Received Data

print(RS485_0.read(10))

• Read Character

print(RS485_0.read_coils(1, 1, 0))

• Read Coil from Address

print(RS485_0.read_discrete_inputs(1, 1, 0))

• Read Discrete Input

print(RS485_0.read_holding_registers(1, 1, 0, True))

• Read Holding Register

print(RS485_0.read_input_registers(1, 1, 0, True))

• Read Input Register

RS485_0.write('')

• Write String to Serial Port

RS485_0.write(''+"\r\n")

• Write One Line String to Serial Port

print(RS485_0.write_multiple_coils(1, 1, 0))

• Retrieve Addresses for Writing Multiple Coils

print(RS485_0.write_multiple_registers(1, 1, 0, True))

• Retrieve Addresses for Writing Multiple Holding Registers

RS485_0.write(bytes([0, 0, 0]))

• Write Raw Data to Serial Port

print(RS485_0.write_single_coil(1, 1, 0))

• Retrieve Address for Writing Single Coil

print(RS485_0.write_single_register(1, 1, 0, True))

• Retrieve Address for Writing Single Holding Register