The E290-900T20S is a next-generation UART wireless serial port module based on the high-performance PAN3060 RF chip. Operating in the 850.125~930.125MHz band (default 868.125MHz), it utilizes the advanced ChirpIoT™ spread spectrum technology to deliver exceptional anti-interference and sensitivity. Designed for long-range IoT connectivity, it supports automatic relay networking, air wake-up, and online IAP firmware upgrades, making it an ideal choice for smart sensors, industrial control, and energy management.
ChirpIoT™ Tech
New generation spread spectrum technology for higher sensitivity (-125dBm).
Relay Networking
Supports automatic multi-level relaying to easily extend communication distance.
AT Command & IAP
Easy configuration via UART and supports online firmware upgrades via IAP.
Ultra-Low Power
Deep sleep current as low as 2μA with support for air wake-up functions.
Technical Specifications
| Radio Frequency Chip | PAN3060 (ChirpIoT™ Technology) |
|---|---|
| Frequency Band | 850.125 ～ 930.125 MHz (Default 868.125MHz) |
| Transmit Power | 20dBm (approx. 100mW) |
| Reference Distance | 5km (Clear/Open, 5dBi gain antenna, 2.4kbps air speed) |
| Communication Interface | UART Serial Port (TTL level, 3.3V) |
| Supply Voltage | DC 2.6V ～ 5.5V (≥5V for full output power) |
| Operating Temp | -40℃ to +85℃ (Industrial design) |
| Dimensions | 26 × 16 mm; SMD Type |
| Air Data Rate | 2.4k ～ 62.5kbps (User programmable) |
| Certifications | CE, RoHS compliant |
| Data Updated | May 2026 |
Interface & Pin Definition
Standard SMD Interface — Ready for Mass Production
The E290-900T20S features a standard 1.27mm stamp hole interface, supporting both SMT soldering and manual pin header mounting. It integrates IPEX and stamp hole antenna options for maximum design flexibility.
Ideal Applications
Smart sensors, security alarms, lighting control, remote telemetry
Wireless meter reading (water, gas, electricity), power monitoring
Environmental sensing, smoke detection, access control systems
Soil sensors, irrigation control, remote greenhouse telemetry
Asset tracking, warehousing management, container status monitoring
Developer Resources
Full technical manual, AT command sets, and IAP upgrade guides for E290 integration.
📄 Download User Manual 💻 SDK & Configuration ToolFrequently Asked Questions
Q: How does the Automatic Relay networking work?
A: The module supports automatic relaying. When set to relay mode, the module will automatically pass data packets between nodes to bypass obstacles and significantly extend the network coverage distance.
Q: Can I upgrade the firmware after the module is installed?
A: Yes. The E290 series supports IAP (In-Application Programming), which allows you to upgrade the module firmware online through the serial port, even after it has been deployed in the field.
Q: What is the benefit of RSSI signal strength indication?
A: The RSSI function allows the module to output the signal strength of received data packets. This is critical for network performance assessment, node placement optimization, and troubleshooting in complex RF environments.
Q: Is the E290-900T20S compatible with other LoRa modules?
A: It uses the new generation ChirpIoT™ technology and is fully compatible with Ebyte's E290 series modules in the same frequency band. It provides superior anti-interference compared to traditional FSK solutions.
Q: What is the power requirement for the module?
A: The module accepts a wide voltage range of 2.6V to 5.5V DC. To ensure the full 20dBm transmit power, a stable 5.0V supply is recommended. For battery-powered applications, the sleep mode reduces current to just 2μA.
