Bluetooth® 5.0 Serial Adapter – Dual Mode RS232 – LM068
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.
Additional information
Wireless Standard
Adapter Type
Programmable (Configurable with AT Commands)
Profiles
GATT-Based, SPP
Programming Interface
SPI
Interfaces
Serial (RS232)
Antenna
Onboard IC Antenna
Dimensions
46.3mm x 34mm x 16mm
Weight
19.16g +/- 0.25g tolerance
Compliance
Certifications
Features
World’s smallest Bluetooth® 5.0 Serial Adapter
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
Typical Industries
EPOS
Aviation
M2M
Automotive
LNG
Documentation
Product Brief
LM068 Product Brief
User Guides
SPP with GAP Central (Default)
SPP with GAP Peripheral
SPP to Serial Bridge
Dynamic and Fixed Pin Sharing Guide
REPORTS
Range Test Report
ECCN / CCATS
Export Control Classification Number
Pending
Video Tutorials
LM068 Video 1
Other Declarations
Asbestos Free Declaration
Illegal Logging Due Diligence Declaration
Harmonization Tariff Codes (HS Codes)
* For any other product documentation please Contact Us
Applications
LM offers firmware development support to assist with bespoke solutions. The LM068 Bluetooth® 5.0 Dual Mode adapter comes with a range of firmware for quick deployment. Firmware can be modified to meet your unique requirements or used for evaluation purposes.
Available Applications
SPP with GAP Central
SPP with GAP Central provides the flexibility of 1 SPP and up to 5 GAP Central connections simultaneously. SPP defines the setup of virtual serial ports for wirelessly connecting two Bluetooth (v1.0 – v3.0) devices; where the LM068 is set as the master (DTE) or slave (DCE) role. An ideal solution for wirelessly replacing RS232 serial cables. The adapter also supports “modem” command for the RTS/CTS/DTR/DSR lines. LM068 is defined as a GAP Central device for initiating Bluetooth low energy connections with nearby peripheral devices. Implemented with Over-the-Air Upgrade (OTAU) functionality for fast and convenient firmware updates. Users can read, write or modify data on the connected devices by utilising simple AT commands. It also supports a whitelist feature for Bluetooth low energy connections.
Latest firmware version: 068LM_SPPC_0201
Firmware Version Record for SPP with GAP Central
SPP or GAP Peripheral
SPP or GAP Peripheral allows the LM068 to run either SPP (Serial Port Profile) via Bluetooth (v1.0 – v3.0) or GAP Peripheral via Bluetooth low energy. SPP defines the setup of virtual serial ports for wirelessly connecting two Bluetooth (v1.0 – v3.0) devices; where the LM068 is set as the master (DTE) or slave (DCE) role. An ideal solution for wirelessly replacing RS232 serial cables. The adapter also supports “modem” command for the RTS/CTS/DTR/DSR lines. LM068 is defined as a GAP Peripheral device for accepting a Bluetooth low energy connection from master devices in range. It includes Over-the-Air Upgrade (OTAU) functionality for effortless firmware updates and SPP over GATT service for serial communication through Bluetooth low energy.
Latest firmware version: 068LM_SPPPER_0105
SPP to Serial Bridge
SPP to Serial Bridge enables incompatible Bluetooth (v1.0 – v3.0) and Bluetooth low energy devices to communicate via LM068. The application is implemented on top of the CSR dual mode stack that provides the flexibility to communicate with any Bluetooth device. A simple AT commands set is available to establish and control the two simultaneous connections that form the bridge between a Bluetooth (v1.0 – v3.0) and a Bluetooth low energy device. It also supports simple secure pairing for Bluetooth connections, a whitelist feature for Bluetooth low energy connections and SPP over GATT service for serial communication through Bluetooth low energy.
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