Migrating to the LM811

How to migrate from the LM820/821/822/823 to the LM811?

The LM811 and LM820/821/822/823 have the same dimensions of 25mm x 12mm x 2mm and the USB interface (pin 2 to pin 5) are in exactly the same position.

When moving to the LM811, consider the following:

  • Pin 1 and Pin 6 have different pin assignments to LM820/821/822/823 .
  • The LM811 has extra pins for a PCM interface. If PCM is not required, this will not affect the design.

Please refer to the datasheets for further information.

LM811 Module



Where can I find BlueZ support for Linux?

BlueZ is the official Bluetooth software stack for Linux. BlueZ is usually preinstalled in the Linux operating system across most of the variants. When using our Host Controller Interface (HCI) adapters or modules with Linux a Bluetooth driver such as BlueZ is required.

To find out the what BlueZ version your distribution of Linux is running, use the following command in the command line: bluetoothd -v

Please visit the BlueZ website for documentation and downloadable drivers: www.bluez.org/

LM811: Linux driver installation


The WiFi driver can be downloaded from here: https://github.com/lwfinger/rtl8723bu If you are compiling on the Raspberry Pi 2 or another ARM device you will need to change the SUBARCH build parameter in the Makefile to “arm”.

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Linux WiFi Ad-hoc mode

Ad-hoc, or IBSS mode allows you to create a wireless network without a central access point. This guide demonstrates a simple Ad-hoc network using one of our adapters and some basic tools found in most modern Linux distributions.

  • At the present time, IBSS may suffer from high levels of packet loss due to an issue with the driver.

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