The E22-900T22U is a plug-and-play USB LoRa module powered by the SX1262 chip, delivering a 5km range and 22dBm output with a standard USB interface for seamless industrial PC integration and field debugging.
| Key Features | Specifications |
|---|---|
| Main IC / Solution | SEMTECH SX1262 |
| Frequency Range | 850.125 ~ 930.125 MHz (Supports 868/915MHz) |
| Transmission Power | 22 dBm (approx. 160mW) |
| Communication Distance | 5 km (In ideal environment) |
| Hardware Interface | Standard USB (Plug-and-play) |
| Special Functions | LBT (Carrier Sensing), RSSI, Wireless Config, Firmware Upgrade |
| Dimensions | 45.3 * 27.8 * 11.2 mm |
Application Scenarios
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Field Testing & Maintenance: The USB standard packaging allows engineers to connect the E22-900T22U directly to a laptop or industrial tablet. This eliminates the need for complex wiring during field site surveys, using the 5km communication range to verify network coverage instantly.
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Industrial Gateway Prototyping: For integrators developing PC-based gateways, this module serves as a rapid RF-to-USB bridge. It solves the pain point of time-consuming hardware integration by providing a 5V IO compatible interface and easy wireless configuration through serial port software.
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Wireless Data Collection Hubs: In smart warehouse environments, the E22-900T22U acts as a reliable coordinator. The SX1262 technology provides superior anti-interference capabilities, ensuring consistent 22dBm signal penetration through metal racking and industrial obstacles.
FAQ
Q: How does the USB interface of the E22-900T22U handle power supply for the SX1262 RF frontend?
A: The module is designed to draw power directly from the USB VBUS line. Since the SX1262 requires high peak current during 22dBm transmission, the internal circuitry includes high-efficiency LDOs and decoupling capacitors to stabilize the 5V input. This ensures that RF performance is not compromised by the switching noise or current limitations typically associated with computer USB ports.
Q: Is the E22-900T22U compatible with other E22 series modules operating at different frequencies?
A: The E22-900T22U operates within the 850.125 to 930.125MHz band. While the USB interface is physically standard, its wireless protocol and modulation are fully compatible with E22-900T series SMD or DIP modules. It cannot communicate with 230MHz or 400MHz versions due to hardware frequency limitations, but it supports the same relay networking and communication key functions across the 900MHz ecosystem.
Q: What are the benefits of the built-in carrier sensing (LBT) and RSSI functions in this USB module?
A: Listen Before Talk (LBT) allows the module to monitor the channel for existing traffic before transmitting, effectively reducing packet collisions in congested 868MHz or 915MHz bands. The RSSI (Received Signal Strength Indicator) output provides real-time dBm values for every received packet, which is critical for engineers when optimizing antenna placement or troubleshooting link budget issues in industrial environments.
Q: Can the firmware of the E22-900T22U be upgraded without specialized hardware?
A: Yes, the module supports IAP (In-Application Programming) via the USB interface. By using Ebyte's provided software tools, users can perform firmware upgrades to access new features like improved automatic relay algorithms or updated communication security protocols. This significantly extends the product life cycle compared to fixed-firmware wireless modules.
