1. Product Overview
The OP-BT is a next-generation Bluetooth optical probe product designed for data reading and parameter configuration of electricity meters, gas meters, heat meters, and other utility meters. It complies with Bluetooth Low Energy (BLE) and IEC62056-21 standards, supporting wireless connectivity via Bluetooth with computers, smartphones, tablets, and other smart devices for remote data collection. It creates a virtual communication port on your device for easy software integration. The optical port features ultra-strong neodymium magnets for secure attachment to electricity meters. With low power consumption, a single charge can read basic information from 10,000 electricity meters. It offers both transparent communication and IEC62056-21 mode CE solutions, automatically adjusting communication speed between the optical head and meters according to IEC standards.
1.1 Key Features and Functions
- Supports dual-mode Bluetooth BLE 5.0 and SPP 2.0 communication;
- Built-in rechargeable lithium battery with extended operation time (up to 75 hours continuous operation or 10,000 meter readings per charge);
- Supports multiple communication protocol passthrough including ANSI C12.18, IEC62056-21 (formerly IEC1107) Mod A/C/E, DLMS/COSEM, EURIDIS, IEC870-5-102, MODBUS, and custom protocols;
- Supports multiple preset baud rate selections with maximum communication speed of 57,600bps;
- Equipped with ultra-strong neodymium magnets for perfect alignment with all IEC62056-21 standard electricity meters;
- World’s first IP67-rated optical head, operating in harsh environments from -30°C to 80°C;
- Supports virtual COM ports for computers and smart devices;
- Includes dedicated management software for configuration and firmware updates;
- Advanced power management protects against over-discharge/overcharge, extending device lifespan.
1.2 Applications
- Data collection from smart electricity/water/gas/heat meters;
- Configuration of electricity/water/gas/heat meters.
2. Hardware Overview
2.1 Package Contents
- OP-BT Bluetooth Optical Head unit
- USB Type-C charging cable
- Certificate of compliance
- Charging adapter (optional, varies by country)
2.2 Product Appearance
We sell products with TESPRO or ZENOVATE brand for different regions. You may see products labled either TESPRO or ZENOVATE.
2.3 LED Indicators
Power/Bluetooth Indicators
Green: Device in Operation Blue: Bluetooth connected
Green Blinking: Low battery
Green/Orange/Red Alternating: Charging
Data Transmission Indicators
Data Transmitting
Data Receiving
3. Operating Instructions
3.1 Power Management
Power On:
Notes:
- Press and hold power button for 3+ seconds until green power LED stays lit.
- Device will automatically powers on when connected via USB Type-C.
- All indicators will be off when powered down.
Power Off:
- Press and hold power button for 3+ seconds until red LED appears, continue holding until LED turns off.
Note: Cannot power off when USB-connected
3.2 Bluetooth Connection
The OP-BT supports Bluetooth 5.0 BLE/SPP dual-mode for Windows, Android, and iOS platforms.
- Classic Bluetooth (BR/EDR): Uses SPP (Serial Port Profile), available on Windows/Android.
- BLE: Uses GATT protocol (Windows/Android/iOS)
When powered on, two Bluetooth devices will appear on your computer/handheld’s bluetooth device list, one for SPP, one for BLE:
- OP-BT 12345 SPP (Classic)
- OP-BT 12345 BLE (Low Energy)
Windows OS
Typically uses SPP mode. Please refer to Pairing with Windows 11 for a step by step guide.
iOS/Android
iOS uses BLE only. Android supports both modes. Select OP-BT directly in your meter reading app.
3.3 Meter Connection
- Align optical head with meter’s communication window (text orientation should match)
- Adjust position for optimal alignment
- Read data via app or host software
3.4 Charging
- Low battery warning at 20% (green LED blinks)
- Charge via Type-C cable
- Charging: multi-color LED alternates
- Fully charged: solid green LED
3.5 Sleep Mode
- Enters sleep after 20 minutes inactivity
- Wake methods: button press/USB connection/device connection/charging
- Stays awake during USB connection
- Any operation resets sleep timer
3.6 Default Settings
Communication
- Protocol: IEC62056-21 auto-baud
- Serial mode: USB virtual COM enabled
OP-BT are has 10 sets of baud rate settings. You can manage them by using OP Manager.
| SET | Baud Rate | Parity | Data Bits | Stop Bit |
|---|---|---|---|---|
| 1(Default) | 9,600 | N | 8 | 1 |
| 2 | 19,200 | N | 8 | 1 |
| 3 | 300 | E | 7 | 1 |
| 4 | 38,400 | N | 8 | 1 |
| 5 | 4,800 | N | 8 | 1 |
| 6 | 9,600 | E | 7 | 1 |
| 7 | 2,400 | E | 7 | 1 |
Bluetooth
- Default SPP name: xxxxxx.SPP
- Default BLE name: xxxxxx.BLE
- Default PIN: None
- Default Transmission power: Class2
- Default Bluetooth Mode: SPP and BLE
- UUIDs: 18F0,2AF0,2AF1
4. Troubleshooting
| Symptom | Possible Cause |
|---|---|
| Won’t power on | Battery depleted - connect charger |
| Bluetooth fails | Not in pairing mode - restart device |
| No data reading | Misaligned optical head - reposition |
| Unstable comms | Light interference - avoid direct light |
| Firmware update fails | Timeout/interruption - retry |
| Frequent sleep | Unstable Bluetooth connection - check connection status |
5. Precautions
- Avoid drops/impacts;
- Don’t use in high temp/humidity;
- Clean optical window regularly;
- Full discharge/charge every 3 months;
- Keep stable during firmware updates;
- Don’t disconnect during updates;
- Update firmware with full charge.
6. Technical Specifications
| Item | Specification |
|---|---|
| Bluetooth | 5.0 BLE+SPP, 2.4G |
| Baud rates | 300~57,600bps |
| Frequency | 2402~2480MHz |
| max Communication Distance | ≤10m (open area) |
| Bluetooth power class | Class 2 |
| OS support | iOS, Android, Linux, Windows, macOS, Windows CE |
| Battery | 3.7V~4.2V, 1050mAh |
| USB Interface | Type-C, 2.0 |
| Standby hours | 80hrs |
| Operation | 75hrs |
| Charge time | ~2hrs |
| IR wavelength | 940nm |
| Receiver | 700-1100nm |
| Temp range | -30°C~80°C |
| Charge temp | 0°C~50°C |
| Rating | IP67 |
| Weight | 59g |
7. Dimensions
8. Support
For technical assistance:
9. Warranty
- Period: 12 months from purchase
- Coverage: Manufacturing defects
- Exclusions: Physical damage, unauthorized repairs
10. Scripting
OP-BT doesn’t support scripting. For scripting functionality, please purchase OP-BTS-B. For OP-BTS scripting, refer to: Scripting Guide.
11. Software Integration
If you plan to develop a software to integrate OP-BT, we prepared a well detailed development guide for you. Please refer to Developer’s Guide.
12. Command Reference
For internal parameter settings: Command Guide.