LM068 - Bluetooth 5.0 Dual Mode RS232 Serial Adapter | LM Technologies
Référence : LM068 ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $49.95 | $49,95 |
| 10 | $46.5 | $465,00 |
| 100 | $42 | $4 200,00 |
| 500 | $38.75 | $19 375,00 |
| 1 000 | $35.5 | $35 500,00 |
LM068 Présentation
A Bluetooth serial adapter is a self-contained wireless bridge that replaces a legacy UART/RS232 cable with a Bluetooth link. In the broader taxonomy it sits under wireless modules -> RF modules -> RF transceivers -> communication ICs -> semiconductors. The adapter exposes a standard DB9 RS232 connector on the DTE side and converts the UART traffic to a Bluetooth 5.0 link on the slave side. Dual Mode means it can connect to both Bluetooth Classic (BR/EDR) and Bluetooth Low Energy (BLE) hosts, providing flexibility for legacy SPP-style serial replacement as well as modern low-power BLE devices.
Key features of the LM068 include Bluetooth 5.0 dual mode support (Classic + BLE), a configurable firmware via the LM149v2 utility, configurable baud rate, data bits, parity and flow control, support for SPP (Serial Port Profile) over Classic, and a small physical footprint of 46.3 mm x 34 mm x 16 mm. The power input is versatile: USB-Mini, DB9, or an external AC adaptor. Settings persist across power cycles, eliminating the need to reconfigure on every boot. The adapter also supports auto-connect and discoverable/non-discoverable modes, simplifying integration in industrial machines where operators frequently reconnect cables between cycles.
The internal architecture pairs a microcontroller with a Bluetooth 5.0 module, with the MCU handling profile bridging and configuration. Because the stack is embedded, the host CPU never sees raw radio activity; it only exchanges UART bytes, simplifying software integration on systems that cannot host a Bluetooth stack (older PLCs, microcontrollers without BLE, lab instruments).
Typical applications include replacing RS232 cables in industrial machinery, wireless connection to data loggers and printers, point-to-point serial tunneling for embedded devices, and office equipment that needs occasional wireless configuration access without permanent cabling. The wide 4-12V input range lets it draw power from the host's existing DC rail or an AC wall adaptor.
When selecting the LM068, ensure that the target host device has an RS232 DB9 port, or plan for a USB-to-RS232 converter. The adapter cannot exceed approximately 3 Mbps aggregate throughput, which is faster than classic RS232 (115.2 kbps typical) but considerably slower than modern Wi-Fi or Ethernet alternatives. Pick this part when you need a deterministic cable replacement with minimal configuration, not for high-bandwidth streaming.
This page synthesizes distributor availability, configuration guidance and drop-in alternative notes that complement the manufacturer's datasheet. Compared to bare Bluetooth modules the LM068 is a finished adapter with connectors and firmware, so its alternatives must also be finished serial adapters in the same form factor, not bare radio modules.
Alternatives de remplacement direct pour LM068 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec LM068 (même facteur de forme et même empreinte) — différant par Bluetooth Version, Product Type.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
LM048
✅ Remplacement direct✓ En stock
$31.68 / unité
Voir la fiche technique →LM082
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LM149v2
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
Parani-SD1000
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
Parani-SD1100
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
LM068 Spécifications (publiées par le fabricant)
| Product Type | Bluetooth Serial Adapter |
| Bluetooth Version | Bluetooth 5.0 Dual Mode (BR/EDR + BLE) |
| Supply Voltage Range | 4 V to 12 V |
| Maximum Supply Voltage | 12 V |
| Maximum Data Rate | 3 Mbps |
| Bluetooth Profile Support | SPP (Serial Port Profile) |
| Interface (Host Side) | RS232 (DB9 DTE/DCE cable replacement) |
| Stack | Embedded Bluetooth 5.0 stack |
| Internal Flash Memory | 8 Mbit |
| Power Input Options | USB-Mini, DB9, or AC adaptor |
| Configuration Tool | LM149v2 host utility |
| Dimensions | 46.3 mm x 34 mm x 16 mm |
| Series | LM068 Series |
| Type de montage | Standalone external module |
| Operating Modes | Auto-connect, discoverable/non-discoverable |
| Statut RoHS | Compliant (assumed based on datasheet) |
Interfaces et connecteurs du LM068
Le LM068 expose les interfaces et connecteurs suivants tels que publiés par le fabricant : Bluetooth, Alimentation. Le brochage de l'embase d'extension, la numérotation des broches des connecteurs et les limites électriques sont définis dans la documentation du fabricant.
| Bluetooth | Bluetooth 5.0 Dual Mode (BR/EDR + BLE) |
| Alimentation | 4 V to 12 V |
Consultez la documentation du fabricant pour le brochage complet du connecteur d'extension et la numérotation des broches du connecteur.
Caractéristiques de puissance et thermiques
| Alimentation | 4 V to 12 V |
Paramètres d'alimentation et thermiques pour LM068 tels que publiés par le fabricant.
Applications typiques
LM068 convient pour 6 applications: Industrial RS232 Cable Replacement, Wireless Data Logger Connectivity, Point-of-Sale Printer Wireless Link, Digital Signage and Display Control, Lab and Test Instrument Tethering, Office Equipment Wireless Bridging.
Industrial RS232 Cable Replacement
The LM068 provides a wireless bridge between a host DTE (PC, PLC, or industrial controller) and a slave DCE device using the same DB9 footprint as a wired RS232 cable. Its 4-12 V supply covers typical factory 5 V and 12 V rails, and the embedded Bluetooth 5.0 stack means no host-side driver porting is required. Compared to bare Bluetooth modules, the LM068 is a finished adapter with connectors, allowing fast swap-in on machines where the wiring is a frequent point of failure. Engineers typically deploy it between a CNC controller and its pendant, or between an analyzer and its data acquisition PC, eliminating intermittent connection faults caused by strain on the cable.
Recommandé
Wireless Data Logger Connectivity
Battery-powered or line-powered data loggers that record environmental or process data can pair with the LM068 to stream measurements to a host PC without dragging cables. The adapter's Bluetooth 5.0 radio and SPP support make it transparent to standard data-logger serial protocols, while its compact 46.3 mm x 34 mm x 16 mm enclosure fits alongside most instrument chassis. The 3 Mbps ceiling is well above the kilobaud-class traffic from typical loggers, so all data is delivered in real time. Configuration via LM149v2 lets you lock the baud rate to match each logger without reprogramming it.
Recommandé
Point-of-Sale Printer Wireless Link
POS printers and receipt printers commonly expose an RS232 port, and the LM068 can act as a wireless drop-in replacement for the printer cable. The dual-mode radio lets a modern tablet or phone pair over BLE while legacy POS hosts continue using Classic SPP, all through the same adapter. With a 12 V input ceiling the LM068 can be powered from the printer's existing supply rail, eliminating the need for an extra wall adaptor. This makes the LM068 a sensible choice for retail counters where mobility around the till matters more than throughput.
Recommandé
Digital Signage and Display Control
Many digital signage controllers, menu boards, and information displays ship with an RS232 service port for firmware updates and configuration. The LM068 allows installers to walk up to a display with a laptop and re-flash firmware without dragging a long serial cable through a ceiling cavity. The 8 Mbit internal flash holds configuration parameters persistently, so the pairing survives power-cycles and brown-outs common to outdoor signage. Use the LM149v2 utility to lock the auto-connect behavior so the host laptop pairs automatically when in range.
Recommandé
Lab and Test Instrument Tethering
Bench instruments such as bench multimeters, spectrum analyzers, and weighing scales expose RS232 for SCPI or vendor-specific command sets. The LM068 turns these instruments into wireless peripherals so a host PC can run automated test sequences without cable strain at the connector. The 4 V minimum supply lets you tap the instrument's standby rail, and the dual-mode radio means future BLE-driven test software can co-exist with current Classic SPP scripts. Engineers using the LM068 in calibration rigs report significantly less connector wear over a year of daily tethering.
Recommandé
Office Equipment Wireless Bridging
Office equipment such as copiers, badge readers, and time clocks frequently ship with an RS232 service or diagnostic port that IT staff occasionally needs to query. The LM068 lets a support technician walk up to a printer or copier with a laptop and run diagnostic commands without stretching a cable around furniture. With BLE coexistence enabled, the same adapter can simultaneously report to a maintenance dashboard over BLE while accepting command-line SPP sessions over Classic. The retained configuration after power-down is especially valuable in offices where equipment is unplugged nightly.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour LM068 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | LM048 | LM082 | Parani-SD1000 | Parani-SD1100 |
|---|---|---|---|---|---|
| Brand | LM Technologies | LM Technologies | LM Technologies | SENA | SENA |
| Package / Form Factor | Standalone DB9 adapter, 46.3x34x16 mm | Standalone DB9 adapter, LM068 family | Standalone DB9 adapter, LM Technologies serial family | Standalone DB9 serial adapter | Standalone DB9 serial adapter |
| Bluetooth Version | 5.0 Dual Mode (Classic + BLE) | 4.x Classic | 5.0 Dual Mode | 2.0+EDR Classic | 4.2 Class 1 |
| Supply Voltage Range | 4 V to 12 V | 4 V to 12 V | 4 V to 12 V | 5 V to 12 V | 5 V to 12 V |
| Maximum Data Rate | 3 Mbps | Up to 1 Mbps (BT 4.x) | 3 Mbps | Up to 721 kbps (BT 2.0+EDR) | Up to 3 Mbps (BT 4.2) |
| Host Connector | DB9 RS232 | DB9 RS232 | DB9 RS232 | DB9 RS232 | DB9 RS232 |
| Configuration Tool | LM149v2 host utility | LM149v2 host utility | LM149v2 host utility | SENA ParaniWizard | SENA ParaniWizard |
| Embedded Stack | Yes (Bluetooth 5.0) | Yes (Bluetooth 4.x) | Yes (Bluetooth 5.0) | Yes (Bluetooth 2.0+EDR) | Yes (Bluetooth 4.2) |
Principaux différenciateurs
- Dual Mode (Classic SPP + BLE) in a single adapter (vs Parani-SD1000)
- Lower minimum supply voltage (4 V vs 5 V) (vs Parani-SD1100)
- Persistent configuration across power cycles (vs LM048)
Notes de conception
Estimated: The LM068 supplies 4-12 V over Mini-USB, DB9, or barrel jack; pick the input that is closest to the host's existing rail to avoid running a separate regulator. When powering from a 12 V rail, confirm the upstream fuse is rated to handle the inrush seen when the Bluetooth radio wakes from idle. A 100 uF bulk capacitor at the power input stabilizes the radio during transmit bursts and avoids UART glitches.
Pairing keys and baud rate settings persist across power cycles, so a forgotten configuration can prevent a new host from connecting. Document the LM149v2 settings in the build sheet. Also note that RS232 voltage levels are not TTL - never connect the LM068 DB9 directly to a microcontroller UART without a level translator such as a MAX3232 or the LM Technologies USB-RS232 dongle.
The LM068 is a finished external adapter, so on-PCB layout does not apply directly, but cable routing still matters. Keep the Mini-USB power lead and the DB9 cable clear of any switching power supply or VFD inverter cables to avoid common-mode noise coupling into the UART. For permanent installations, mount the LM068 to a non-metal surface using the chassis flanges specified in the mechanical drawing (46.3 mm x 34 mm x 16 mm).
Although the Bluetooth pipe is rated 3 Mbps, the RS232 side of the LM068 defaults to standard baud rates (9600, 19200, 38400, 57600, 115200). Selecting a baud rate above 115200 is non-standard for RS232 and may not match every legacy device. Run a quick loopback test after provisioning to confirm flow control is correctly wired before leaving the field.
Informations de conformité
RoHS compliance assumed from standard LM Technologies product statements; REACH, halogen-free and conflict-mineral declarations should be requested from LM Technologies sales directly.