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Operating Toradex Wi-Fi/BT Capable Modules Using Single Antenna Configuration

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Article updated at 25 Oct 2019
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Toradex Wi-Fi/BT enabled SoMs support dual antenna configuration. Dual antenna operation is recommended and default configuration to obtain maximum throughput and stability performance through the usage of MIMO. If for whatever reason operation with a single antenna is required, please follow this guide.

Other Wi-Fi related articles

If this is not the information you are looking for, please, refer to the Wi-Fi Connectivity with Toradex’s Computer on Module (CoM) article for more Wi-Fi related information.



  1. Connect the antenna to the port marked AUX,

  • wifi module

    Wi-Fi/BT Module

  1. It is recommended for the MAIN port to be 50 Ω terminated,
  2. Follow the "Boot-Time Configuration" or "Run-Time Configuration" procedure below.

Run-Time Configuration

  1. Make sure wifi is not enabled by disabling any connections with connman or whatever other network manager is in use and execute:

	$ ip l dev mlan0 down

  1. Use iw to set the antenna bitmap:

	$ iw phy phy0 set antenna 0x02 0x02

  1. Now you can use Wi-Fi as usual, only the AUX antenna will be used. Note: If you're only using WiFi in your application, better radio performance can be achieved by connecting antenna to MAIN port and using

phy phy0 set antenna 0x01 0x01

command (in this case the AUX port needs to be 50 Ω terminated)