In the complex environment of IoT device connectivity, developers are constantly faced with a core trade-off: how to find the perfect balance between long-distance transmission, high data rates, anti-interference capabilities, and development ease? Traditional 433MHz LoRa modules are limited by speed, while conventional 2.4GHz modules offer high speed but insufficient range. With cutting-edge insights in RF technology, Chengdu EBYTE Electronic Technology Co., Ltd. has launched the E28-2G4T20SX—a TTL serial wireless module that innovatively combines the 2.4GHz frequency band with LoRa spread spectrum technology, successfully breaking through this industry bottleneck and setting a new standard for next-generation long-range, high-speed wireless data transmission.

Cross-Border Integration of 2.4GHz LoRa

The E28-2G4T20SX is not just a simple performance upgrade, but an architectural revolution from the ground up. Its core lies in the adoption of the Semtech SX1281 RF chip, which for the first time integrates three modulation and demodulation technologies—high-performance LoRa (long-range), FLRC (high-speed), and GFSK (universal)—into the high-performance 2.4GHz ISM band.

Unprecedented Balance of Range and Speed

In open environments, with a gain antenna, its ideal transmission distance can reach up to 6 kilometers. Meanwhile, in FLRC mode, its air rate can reach up to 1.3 Mbps, and in GFSK mode, it can even reach 2 Mbps, perfectly covering a wide range of needs from low speed (1 kbps) to high speed, eliminating the dilemma of choosing between "range" and "speed."

Minimalism of "Transparent Serial Port"

As a UART TTL serial wireless module, the most attractive feature of the E28-2G4T20SX is its "transparent transmission." Users only need to treat it as a "wireless serial cable"—any data sent by the main controller via UART will be transmitted wirelessly in its original form using the user-selected modulation mode (LoRa/FLRC/GFSK), and the receiver will output it via UART in its original form. No complex packetization, framing, or protocol processing is required, greatly simplifying system integration.

Multi-Mode Modulation, Scenario-Adaptive

  • LoRa Mode: Designed for long-distance, low-speed, high-penetration, and strong anti-interference scenarios, it is a powerful tool for smart meters, environmental monitoring, and long-distance data backhaul.

  • FLRC Mode: While retaining some of LoRa's spread spectrum advantages, it increases the speed to Mbps level, making it an ideal choice for medium-distance, medium-data-volume transmission (such as images, audio, and compressed video frames).

  • GFSK Mode: Provides high-bandwidth, high-real-time data transmission, compatible with some Bluetooth devices, suitable for remote controls, game controllers, and applications requiring high speed but not extreme range.

High Integration and Reliability Assurance

  • Built-in PA+LNA: Integrates a power amplifier (PA) and low-noise amplifier (LNA), achieving a transmit power of up to 20dBm (approximately 100mW) while significantly improving receiving sensitivity and overall link stability.

  • Industrial-Grade Design: Uses a 52MHz high-precision active crystal oscillator to ensure frequency stability. Supports a wide operating temperature range of -40°C to +85°C, adapting to harsh industrial and outdoor environments.

  • Data Security and Efficiency: Supports data encryption and compression functions, ensuring the security of data transmitted over the air while reducing transmission time and the probability of interference.

Rich Networking and Configuration Functions

  • Flexible Networking: Supports multiple working modes such as fixed-point transmission (one-to-one), broadcast transmission (one-to-many), and channel monitoring, enabling flexible node management through address and channel combinations.

  • Convenient Configuration: Through the combination of three pins (M0, M1, M2), the module can flexibly switch between 8 working modes, including transmission mode, RSSI strength detection mode, sleep mode, and configuration mode. Parameter configuration supports serial port commands, which can be easily completed via a PC or user MCU.

  • Hardware Status Indication: Provides an AUX pin for wireless transmit/receive status indication, which can be used to wake up external MCUs and optimize system power management.

EBYTE deeply understands developers' pain points and provides complete onboarding support for the E28-2G4T20SX:

Ready-to-Use Evaluation Ecosystem

A matching E28-2G4TBM-01 development test board is launched. This test board integrates the E28-2G4T20SX module, Type-C power supply, reset button, transmit/receive indicators, and all key pin headers. Developers can complete hardware connection, parameter configuration, and data transmission/reception testing within minutes without any hardware design, minimizing the prototype verification cycle.

Clear Compatibility Matrix

The E28-2G4T20SX belongs to the extensive E28-2G4TxxSX series and is pin-compatible with the E28-2G4T12S (12.5dBm) and E28-2G4T27SX (27dBm, longer range) in the same series. Users can seamlessly replace and upgrade according to the specific distance and power consumption requirements of their projects, reducing design risks.

Typical Application Scenarios

  • Industrial IoT and Sensor Networks: Wireless data collection from factory equipment, remote aggregation of distributed sensor groups (such as temperature and humidity, gas sensors).

  • Smart Agriculture and Environmental Monitoring: Backhaul of soil moisture and meteorological data in large-scale farmland, remote monitoring of water conservancy and geological disaster monitoring points.

  • Smart Security and Emergency Communications: Data supplementary transmission for video monitoring points, construction of temporary emergency command networks.

  • Advanced Remote Control and Teleoperation: HD video transmission and control signal relay for medium-distance drones, professional industrial remote controls.

  • Commercial and Consumer Electronics: Data transmission for POS machines in complex environments, wireless game controllers, high-quality wireless voice transmission.

The release of the EBYTE E28-2G4T20SX marks the transition of 2.4GHz LoRa technology from "concept" to "mature application." Through the core idea of "multi-mode modulation," it skillfully integrates the advantages of different technical routes, providing users with a "one-stop" wireless serial port solution covering ranges from hundreds of meters to kilometers and speeds from bps to Mbps. Its transparent transmission feature further reduces the development threshold to the same level as wired serial ports.

Choosing the E28-2G4T20SX is not just choosing a high-performance module, but a development path that trades "minimal integration" for "extreme performance." Whether facing complex and variable industrial environments or pursuing ultimate user experiences in consumer applications, the E28-2G4T20SX will become a cornerstone choice for next-generation intelligent wireless product development with its comprehensive advantages of high speed, long range, reliability, and ease of use.