The Ebyte E65-2G4T12S is an industrial 2400-2480MHz 2.4GHz SMD full-duplex UART wireless transceiver module with 12dBm transmit power, 800-meter open-air transmission range, adaptive baud rate from 1.2Kbps up to 3Mbps, automatic frequency hopping anti-interference, active temperature compensated crystal oscillator, dual IPEX/stamp hole RF interfaces, 2.3V to 3.6V wide low voltage supply, industrial -40 to 85 Celsius operating temperature, supporting unlimited-length continuous bidirectional data transmission for high-speed industrial IoT file and real-time signal delivery.
| Parameter Category | Parameter Item | Specification Value |
|---|---|---|
| Basic Information | Model Number | E65-2G4T12S |
| Basic Information | Package Type | SMD Surface Mount |
| Basic Information | Module Dimension | 28.7mm * 17.5mm |
| Basic Information | Net Weight | 1.2g |
| RF Performance | Working Frequency Band | 2400MHz ~ 2480MHz ISM Band |
| RF Performance | Max Transmit Power | 12dBm |
| RF Performance | Receiving Sensitivity | -95dBm |
| RF Performance | Max Open Test Distance | 800m |
| RF Performance | Anti-interference Mechanism | Automatic Frequency Hopping, 80 channels per second |
| Communication Spec | Communication Mode | Full Duplex Point-to-Point Transparent Transmission |
| Communication Spec | UART Baud Rate Range | 1.2Kbps ~ 3Mbps, default 115.2Kbps |
| Communication Spec | Data Cache Capacity | TX Cache 20KByte, RX Cache 10KByte |
| Communication Spec | Transmission Packet Limit | Unlimited Continuous Transmission |
| Hardware Interface | Main Serial Interface | TTL UART 3.3V Level |
| Hardware Interface | RF Antenna Interface | IPEX Connector / Stamp Hole Pad |
| Electrical Spec | Supply Voltage Range | 2.3V ~ 3.6V DC, optimal at 3.3V |
| Electrical Spec | Average TX Current (3.3V) | 48mA ~ 50mA |
| Electrical Spec | Average RX Current (3.3V) | 47mA ~ 49mA |
| Environmental Spec | Operating Temperature | -40 Celsius ~ 85 Celsius |
| Core Hardware Feature | Oscillator Design | Active Temperature Compensated Crystal Oscillator |
| Custom Service | OEM & ODM Support | Yes, custom firmware & PCB layout available |
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| Main Parameters | Performance | Remarks | ||
| Min. | Typical | Max | ||
| Working Voltage (V) | 2.3 | 3.3 | 3.6 | The output power can be guaranteed if it is more than 3.3V |
| Communication level（V） | - | 3.3 | - | Risk of burn out when using 5V level |
| Working temperature (℃) | -40 | - | +85 | Industrial design |
| Working frequency（MHz） | 2400 | - | 2480 | ISM frequency band |
| TX Current(mA) | 48 | 49 | 50 | Average current, instantaneous current (Max)120mA@3.3V |
| RX current (mA) | 47 | 48 | 49 | Average current, instantaneous current (Max)120mA@3.3V |
| Max TX power (dBm) | 11 | 11.5 | 12 | - |
| Receiving sensitivity (dBm) | - | -95 | - | - |
| UART baudrate (bps) | 1.2K | 115.2K | 3M | Default 115.2Kbps |
| Distance (m) | 800 | - | ||
| TX packet length | Continuous transmission | Continuous transmission does not limit packetlength, pay attention to flow control and specificbaud rate | ||
| Communication interface | UART serial port | See pin description for details | ||
| Packaging | SMD | See dimension description for details | ||
| Size (mm) | 28.7 * 17.5 | Length * width | ||
| RF interface | IPEX/Stamp hole | The equivalent impedance is about 50 Ω | ||
Practical Application Scenarios
1. Tunnel & Subway Construction Wireless Monitoring System
Global infrastructure engineering teams deploy E65-2G4T12S for tunnel lighting controllers, gas alarm sensors and underground construction monitoring cameras. Its automatic frequency hopping technology avoids signal interference from construction machinery and power cables, full-duplex 3Mbps high baud rate transmits real-time video frame data and multi-sensor telemetry simultaneously. The compact SMD form factor integrates into compact sensor terminals, and it pairs with Ebyte E810-RS-U01 USB serial converter to sync collected underground data to office industrial PCs without wired cable laying.
2. Industrial Robotic Arm Real-Time Wireless Control & Data Upload
European automation OEM manufacturers integrate this 2.4GHz full-duplex module into articulated robotic arms and assembly line motion controllers. Unlimited continuous transmission supports long real-time motion instruction streams, hardware flow control eliminates data overflow during high-speed bidirectional communication, and active temperature compensated crystal ensures stable RF frequency inside high-temperature workshop cabinets. It works with Ebyte industrial serial gateways to upload robot operation logs to cloud MES production management platforms.
3. Medical Imaging Device High-Speed Wireless File Transmission
Overseas medical equipment developers adopt E65-2G4T12S for portable ultrasound scanners and portable X-ray imaging equipment. Full-duplex bidirectional transmission quickly transfers large medical image files at up to 3Mbps baud rate, low 2.3V to 3.6V wide voltage supply fits built-in lithium battery medical devices, and industrial wide temperature range adapts to cold storage medical transport environments. The dual IPEX/stamp hole antenna interface simplifies medical device miniaturized PCB layout design.
4. Smart Warehouse AGV Wireless Real-Time Dispatch Communication
Logistics automation system suppliers use E65-2G4T12S for automated guided vehicle (AGV) onboard control units and warehouse central dispatch hosts. 800-meter open transmission distance covers large warehouse storage areas, frequency hopping anti-interference blocks signal conflict from multiple co-existing 2.4GHz warehouse WIFI devices, and large 20K TX /10K RX cache prevents command packet loss during peak AGV scheduling traffic.
5. Outdoor Industrial Testing Equipment Wireless Data Logging
Environmental testing instrument manufacturers embed this SMD module into portable vibration analyzers, weather monitoring stations and hydraulic pressure test equipment. Ultra-wide -40 to 85 Celsius operating temperature supports field test in cold northern regions and high-temperature desert sites, SMD packaging is suitable for mass OEM surface mount production, and transparent UART transmission is compatible with standard Modbus sensor protocols used by Ebyte E30 series Sub-GHz remote monitoring modules.
FAQ Section
1. What is the core difference between full-duplex E65-2G4T12S and half-duplex 2.4GHz wireless serial modules?
This E65 module supports simultaneous bidirectional data send and receive without switching transmit/receive mode, while half-duplex modules can only transmit or receive at one time. It carries independent TX 20KByte and RX 10KByte cache, enables unlimited continuous large file transmission and real-time synchronous control signal delivery, which cannot be achieved by half-duplex wireless serial modules.
2. Why does this module adopt active temperature compensated crystal oscillator instead of ordinary crystal?
Active temperature compensated crystal oscillator locks stable RF frequency under extreme temperature changes from -40 Celsius to 85 Celsius, avoids frequency drift and packet loss in fluctuating industrial environments. Ordinary uncompensated crystal oscillators generate large frequency offset at high or low temperature, causing unstable wireless communication and high data loss rate for long-term field operation.
3. Can the 3.3V TTL UART interface of E65-2G4T12S connect directly to 5V MCU mainboards?
Direct connection with 5V logic level will burn out the module internal circuit. Users must add external level shifting circuits to convert 5V to 3.3V before connecting with 5V single-chip microcomputers, the module only supports 3.3V communication level input and output safely.
4. What anti-interference performance does the automatic frequency hopping function bring for industrial multi-device environments?
The module automatically jumps across 80 different frequency channels every second to bypass occupied or disturbed frequency points, effectively resist interference from WIFI, Bluetooth, industrial frequency converters and other 2.4GHz RF equipment. It maintains stable continuous data transmission even in dense wireless signal factory workshops and underground construction sites.
5. Does E65-2G4T12S support OEM customized firmware and hardware PCB modification for mass production?
Ebyte provides complete OEM and ODM customization service for this SMD module. Bulk buyers need to confirm sample firmware version with sales before mass order, engineers can customize AT command sets, communication protocols and antenna pad layout according to customer industrial equipment requirements, and deliver pre-programmed finished modules for direct SMT assembly.
