# Multiple emonTX Serial connections

**URL:** <https://community.openenergymonitor.org/t/multiple-emontx-serial-connections/15221>\
**Category:** emonPi\
**Created:** [27 August 2020 20:30 UTC](https://community.openenergymonitor.org/t/multiple-emontx-serial-connections/15221 "2020-08-27T20:30:21Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![borpin](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/borpin/32/193_2.png) [@borpin](https://community.openenergymonitor.org/u/borpin)\
**Post date:** [27 August 2020 20:50 UTC](https://community.openenergymonitor.org/t/multiple-emontx-serial-connections/15221/2 "2020-08-27T20:50:55Z")

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I work on the premise that you have 3 USB TTL connectors.

Are these recent purchases?

Simply copy the settings, change the interfacer name, com\_port and node offset. I use a nodename as well. This should work (never tried it though).

```auto
[[SerialTx0]]
     Type = EmonHubTx3eInterfacer
      [[[init_settings]]]
           com_port= /dev/ttyUSB0
           com_baud = 115200
      [[[runtimesettings]]]
           pubchannels = ToEmonCMS,

           nodeoffset = 0
           nodename = Serial_0

[[SerialTx1]]
     Type = EmonHubTx3eInterfacer
      [[[init_settings]]]
           com_port= /dev/ttyUSB1
           com_baud = 115200
      [[[runtimesettings]]]
           pubchannels = ToEmonCMS,

           nodeoffset = 1
           nodename = Serial_1

```

I think the `nodename` will only work if you are sending via MQTT. There are some changes proposed for the MQTT interfacer (which I am running), but I think this will work regardless.

If you are sending via the HTTP interfacer, you will need a different ‘nodeid’ setting I think.

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