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Error Data length when reading

See original GitHub issue

Hello

I am working on the battery Modbus we talked about in issue and found my problem was I am using port RS232 instead of 485 (Battery has both ports).

So now I moved forward and I am getting a reply from the battery but it is not showing up in node-red

I am getting error Data length error, expected 9 got 1, but when sniffy the serial port I see the below, 9 bytes with correct values have been returned.

Is it possible because I am using USB to RS485?

  0x26 (&)
  0x04
  0x10
  0x00
  0x00
  0x02
  0x73 (s)
  0xfc

  0x26 (&)
  0x04
  0x04
  0x14
  0x8e
  0x27 (')
  0x10
  0xd3
  0x61 (a)

Thanks

Issue Analytics

  • State:closed
  • Created 6 years ago
  • Comments:8 (3 by maintainers)

github_iconTop GitHub Comments

2reactions
shahbourcommented, Mar 5, 2018

Worked perfectly, now I am able to read the data. I noticed sometimes it is showing timeout but still i get the data in the debug.

Thanks for your help

2reactions
yaacovcommented, Mar 3, 2018

I thinks that the RTUBufferedPort should solve this, but AFAIK it is the one used by node-red, @biancode ?

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