LM068 (Adapter Only)

Bluetooth® 5.0 Dual Mode Serial Adapter


  • World’s smallest Bluetooth® 5.0 Dual Mode Serial Adapter
  • Class 1
  • DTE / DCE (Master / Slave) mode switch
  • DTR / DSR Handshaking and RTS / CTS Flow control lines
  • Full Duplex for simultaneous communication between sender and receiver
  • Low Power Consumption
  • Over-the-Air Upgrade (OTAU) available
  • Application firmware support


The LM068 is the world’s smallest Bluetooth® 5.0 serial adapter (RS232), providing a secure and reliable Bluetooth® 5.0 connection. Designed to replace RS232 cables between a master (DTE) device and slave (DCE) devices such as printers, data loggers and digital signalling devices. This standalone adapter incorporates a micro-controller unit with an 8 Mbit flash memory for running the application. The firmware controls the RS232 signals, including DTR / DSR handshaking and RTS / CTS flow control lines. The AT Command set is used to change the configurations, plus the developer can also configure and modify the settings of a remote LM068 from a local LM068. Customised configurations and settings can be preloaded to the LM068, simplifying the manufacturing and testing process. We also offer Bluetooth® Dual Mode applications, which can be customised to your specification. The module can be used as a bridge between Bluetooth® 5.0 and is backward compatible with 2.0, v2.1 and Bluetooth® v4.0, v4.1 devices, using our SPP to Serial Bridge application. We also offer SPP with GAP Central and SPP or GAP Peripheral applications.

Tech Spec


Wireless Standard Bluetooth 5.0
Backward Compatibility Bluetooth 2.0, 2.1, 4.0, 4.1, 4.
Frequency 2.4 GHz
Adapter Type Programmable (Configurable with AT Commands)
Profiles GATT-Based, SPP
Programming Interface SPI
Interfaces Serial (RS232)
Antenna IC Antenna
Dimensions 46.3mm x 34mm x 16mm
Weight 19.16g +/- 0.25g tolerance
Compatibility Windows

  • Windows CE6
  • Windows CE7
  • Windows XP
  • Windows Vista
  • Windows 7
  • Windows 8
  • Windows 10 IoT
  • Windows 10


Linux, Raspberry Pi

Datasheets & Downloads

  1. Users Guide
  2. Spec Sheet



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