Telegraf modbus plugin serial port connection problem

Telegraf
,
1

Hello.

I’m test telegraf with modbus rtu in windows.
but there is error code in windows command.
usb port number is com7.

error message
2021-10-21T06:04:20Z E! [inputs.modbus] Error in plugin: The system cannot find the path specified.

This is modbus.conf

[[inputs.modbus]]
name = “witmotion”
slave_id = 80
timeout = “1s”
controller = “file:///dev/ttyUSB07”
baud_rate = 9600
data_bits = 8
parity = “N”
stop_bits = 1
transmission_mode = “RTU”
holding_registers = [
{ name = “angle_x”, byte_order = “AB”, data_type = “UINT16”, scale=0.1, address = [61]},
{ name = “angle_y”, byte_order = “AB”, data_type = “UINT16”, scale=0.1, address = [62]},
{ name = “angle_z”, byte_order = “AB”, data_type = “UINT16”, scale=0.1, address = [63]},
{ name = “temperature”, byte_order = “AB”, data_type = “UINT16”, scale=0.01, address = [64]},
]

2

In windows the COM-Ports are named differently. In your example you do have a Unix/Linux path. Maybe try controller = “file:///com7"?

1 Like
3

It was solved thanks to you.

5

@ahsjdkfl what was the path you used in Windows to solve this problem?
thanks

6

Hi,
I have a same problem with windows 10

image

## Serial (RS485; RS232)
  controller = "file:///COM12"
  baud_rate = 9600
  data_bits = 8
  parity = "N"
  stop_bits = 1

2022-10-19T16:23:55Z I! Starting Telegraf 1.24.2
2022-10-19T16:23:55Z I! Available plugins: 205 inputs, 9 aggregators, 26 processors, 20 parsers, 57 outputs
2022-10-19T16:23:55Z I! Loaded inputs: modbus
2022-10-19T16:23:55Z I! Loaded aggregators:
2022-10-19T16:23:55Z I! Loaded processors:
2022-10-19T16:23:55Z W! ←[31mOutputs are not used in testing mode!←[0m
2022-10-19T16:23:55Z I! Tags enabled: host=DESKTOP-AAN2EQ7
2022-10-19T16:23:55Z E! [inputs.modbus] Error in plugin: Le fichier spécifié est introuvable.
2022-10-19T16:23:55Z E! [telegraf] Error running agent: input plugins recorded 1 errors

I think the problem must come from the path to COM12 but I don’t know what to write ?

Thank you

7

Hi, I’m trying to use Modbus RTU over serial using windows and I’m having the exact same issue. Has anyone been able to resolve this yet?

8

Can you please test the binary in PR #12339 or a recent nightly build!?