python
def __init__(self, uart_id, baudrate=9600, data_bits=8, stop_bits=1, parity=None, pins=None, ctrl_pin=None)

python
def read_coils(self, slave_addr, starting_addr, coil_qty)

python
def read_discrete_inputs(self, slave_addr, starting_addr, input_qty)

python
def read_holding_registers(self, slave_addr, starting_addr, register_qty, signed=True)

python
def read_input_registers(self, slave_addr, starting_address, register_quantity, signed=True)

python
def write_single_coil(self, slave_addr, output_address, output_value)

python
def write_single_register(self, slave_addr, register_address, register_value, signed=True)

python
def write_multiple_coils(self, slave_addr, starting_address, output_values)

python
def write_multiple_registers(self, slave_addr, starting_address, register_values, signed=True)

python
def _calculate_crc16(self, data)
def _bytes_to_bool(self, byte_list)
def _to_short(self, byte_array, signed=True)

python
def _send_receive(self, modbus_pdu, slave_addr, count)
def _uart_read(self)
def _validate_resp_hdr(self, response, slave_addr, function_code, count)

python
# 创建串口实例
serial = Serial(uart_id=2, baudrate=9600)

# 读取线圈
coil_status = serial.read_coils(slave_addr=1, starting_addr=0, coil_qty=8)

# 读取寄存器
registers = serial.read_holding_registers(slave_addr=1, starting_addr=0, register_qty=4)

python
# 写单个线圈
status = serial.write_single_coil(slave_addr=1, output_address=0, output_value=True)

# 写多个寄存器
values = [100, 200, 300]
status = serial.write_multiple_registers(slave_addr=1, starting_address=0, register_values=values)

python
# 使用方向控制引脚
serial = Serial(uart_id=2, baudrate=9600, ctrl_pin=15)