serial async client 3.0.2 timeout always takes 3,0s no matter the value set to timeout

[bsense-rius]

Versions

• Python: 3,8
• OS: 22.04, 20.04
• Pymodbus: 3.0,2
• Modbus Hardware (if used): Different sensors: Temperature, GPIO

Pymodbus Specific

• Server: NA
• Client: rtu - async

Description

Whenever there is an issue with the sensor (power loss, wiring problem) the AsyncModbusSerialClient always times out after 3.0s, despite that during the client instantiation we set a timeout with a different value.

What were you trying, what has happened, what went wrong, and what did you expect?
It can be easily repeated: just disconnect the 485 (modbus) connection cables from the peripheral and timeout raises after 3.0s

I had already reported this issue 6 weeks ago: timeout issue

GraciousGpal pointed out that this issue was also present in AsyncModbusTCPClient(). He worked out a solution that when I apply to AsyncModbusSerialClient() works too,

It seemed, though, that his comment lead to fix the same issue for AyncModbusTCPClient(), but it was not applied to AsyncSerialModbusClient)()

Code and Logs

# code and logs here.

# please use the following to format logs when posting them here
import pymodbus
pymodbus.pymodbus_apply_logging_config()

...
                        client =  AsyncModbusSerialClient(port=self.commPort, baudrate=self.commSpeed, timeout=self.commTimeout)
                        await client.connect()
                        self.client = client

                        # Fix timeout issue. Otherwise it takes default 3.0s
                        self.client.protocol.params.timeout = self.commTimeout
                        self.client.protocol.transaction.client.params.timeout = self.commTimeout

...

[janiversen]

It is very likely it was only applied to AsyncModbusTCPClient, because the client directory is being reworked. I will apply your code later....you could also submit it as a pull request, and save me the job.