The E290-400T series (20D/30D) is a next-generation wireless serial port module (UART) utilizing the high-performance PAN3060 RF chip. Featuring the advanced ChirpIoT™ spread spectrum technology, it delivers exceptional anti-interference capabilities and sensitivity, far surpassing traditional FSK solutions. Designed for "plug-and-play" transparent transmission, it supports complex features like automatic relay networking and air wake-up (WOR), making it the ideal long-range communication solution for industrial IoT and smart sensing.
ChirpIoT™ Spread Spectrum
Advanced modulation for extreme sensitivity (-135dBm) and superior penetration.
Automatic Relay Networking
Supports multi-level relay to extend communication distance indefinitely without manual routing.
Low Power WOR
Air wake-up functionality allows battery-powered nodes to stay in deep sleep until data arrives.
Easy AT Commands
Configure frequency, power, and air speed via simple serial commands or wireless IAP.
Technical Specifications
| RF Solution | PAN3060 Chipset |
|---|---|
| Operating Frequency | 410.125 ～ 493.125 MHz (Default 433.125MHz) |
| Transmit Power | 20dBm (100mW) for 400T20D | 30dBm (1W) for 400T30D |
| Communication Distance | 5km (400T20D) / 10km (400T30D) in open air |
| Interface Type | UART Serial (TTL Level 3.3V) |
| Operating Voltage | 3.3 ～ 5.5V DC (≥5.0V recommended for 30dBm version) |
| Modulation Method | ChirpIoT™ Spread Spectrum |
| Operating Temp | -40℃ to +85℃ (Industrial Grade) |
| Module Dimensions | 21×36 mm (20D) / 24×43 mm (30D); DIP Package |
| Antenna Interface | SMA-K (50Ω impedance) |
| Data Updated | May 2026 |
Interface & Pin Definition
7-Pin Standard DIP Interface — Seamless Integration
The E290 series uses a standard 2.54mm pitch pin header. Mode pins (M0, M1) allow switching between Transmission, WOR, Configuration, and Deep Sleep modes. The AUX pin provides real-time status feedback for busy/idle states.
Ideal Applications
Wireless water, gas, and electricity meter reading systems.
Remote soil moisture sensors, greenhouse control, and irrigation.
Wireless PLC data acquisition, telemetry, and environment monitoring.
Long-range smoke detectors, smart locks, and property security.
Pipeline monitoring, pressure sensors, and remote terminal units (RTU).
Developer Resources
Comprehensive user manuals, AT command sets, and reference design files.
📄 Download User Manual 💻 Configuration Tool & DriverFrequently Asked Questions
Q: What is the difference between E290-400T20D and E290-400T30D?
A: The T20D version has a maximum transmit power of 20dBm (100mW) for a range of up to 5km. The T30D version is a high-power model (1W) providing up to 10km range — ideal for harsh environments or extreme distances.
Q: How does the Automatic Relay networking work?
A: This module supports a self-organizing relay function. By simply enabling the relay mode, nodes can automatically act as repeaters to pass data from distant nodes to the gateway, effectively multiplying the total communication range.
Q: Can I use this with 5V microcontrollers like Arduino?
A: Yes. While the serial communication level is 3.3V, you can connect it to 5V MCUs. We recommend using a 4.7k-10k resistor in series on the RXD line of the module to ensure long-term stability with 5V logic.
Q: Does ChirpIoT™ interfere with standard WiFi or Bluetooth?
A: No. This module operates in the Sub-1GHz band (433/470MHz), which is physically separate from the 2.4GHz spectrum used by WiFi/Bluetooth, ensuring zero interference with local wireless networks.
Q: What power supply is needed for the 30dBm version?
A: For the 1W (30dBm) version, we recommend a power supply capable of providing at least 1A peak current at 5V to ensure the transmitter operates at full rated power without voltage drops.
