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kasbert / epsolar-tracer

Tools for EPsolar Tracer BN solar charge controller
Apache License 2.0
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IOError: [Errno 25] Inappropriate ioctl for device #34

Closed IoTiA closed 1 year ago

IoTiA commented 6 years ago

Hello, I want to read device data through modbus (TTL-RS485 module) communication using raspberry pi for this I write this python code. ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' import pymodbus import serial import RPi.GPIO as GPIO GPIO.setmode(GPIO.BOARD) GPIO.setup(15, GPIO.OUT) from pymodbus.client.sync import ModbusSerialClient as ModbusClient client = ModbusClient(method='rtu', port='/dev/ttyAMA0', timeout=1, stopbits = 1, bytesize = 8, parity='N', baudrate= 38400) client.connect() while True: temp = client.read_holding_registers(address=1, count=1, unit=1); print temp.registers[0] / 100; ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' When i run this code i getting error.. True Traceback (most recent call last): File "pro.py", line 14, in temp = client.read_input_registers(address=1009, count=2, unit=0x01); File "/home/pi/.local/lib/python2.7/site-packages/pymodbus/client/common.py", line 125, in read_input_registers return self.execute(request) File "/home/pi/.local/lib/python2.7/site-packages/pymodbus/client/sync.py", line 108, in execute return self.transaction.execute(request) File "/home/pi/.local/lib/python2.7/site-packages/pymodbus/transaction.py", line 140, in execute full=full File "/home/pi/.local/lib/python2.7/site-packages/pymodbus/transaction.py", line 207, in _transact size = self._send(packet) File "/home/pi/.local/lib/python2.7/site-packages/pymodbus/transaction.py", line 224, in _send return self.client.framer.sendPacket(packet) File "/home/pi/.local/lib/python2.7/site-packages/pymodbus/framer/rtu_framer.py", line 276, in sendPacket size = self.client.send(message) File "/home/pi/.local/lib/python2.7/site-packages/pymodbus/client/sync.py", line 77, in send return self._send(request) File "/home/pi/.local/lib/python2.7/site-packages/pymodbus/client/sync.py", line 512, in _send waitingbytes = self._in_waiting() File "/home/pi/.local/lib/python2.7/site-packages/pymodbus/client/sync.py", line 494, in _in_waiting waitingbytes = getattr(self.socket, in_waiting)() File "/home/pi/.local/lib/python2.7/site-packages/serial/serialutil.py", line 590, in inWaiting return self.in_waiting File "/home/pi/.local/lib/python2.7/site-packages/serial/serialposix.py", line 467, in in_waiting s = fcntl.ioctl(self.fd, TIOCINQ, TIOCM_zero_str) IOError: [Errno 25] Inappropriate ioctl for device

kasbert commented 1 year ago

This is more like libmodbus problem. You are probably out of luck with ttyAMA.