E220-900T22D LoRa LLCC68 Wireless Module
The E220-900T22D is a high-performance 22dBm wireless module designed specifically for long-distance communication. Utilizing the latest ChirpIoT™ LoRa technology, it provides superior interference resistance and industrial-grade reliability for smart home and industrial control scenarios.
| Ordering Model | Package Type | Interface | Core IC | Frequency | Dimensions |
|---|---|---|---|---|---|
| E220-900T22D | DIP (Plug-in) | UART (SMA-K) | LLCC68 | 850.125~930.125MHz | 21 * 36 mm |
| E220-900T22S | SMD (Surface Mount) | UART (IPEX/Stamp Hole) | LLCC68 | 850.125~930.125MHz | 16 * 26 mm |
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Core Technical Specifications
| Main Parameter | Value / Performance | Remark |
|---|---|---|
| Chip Solution | Semtech LLCC68 | New generation LoRa technology |
| Frequency Band | 850.125 ~ 930.125MHz | Default 868.125MHz (ISM) |
| Transmit Power | 22dBm (approx. 160mW) | Adjustable via UART |
| Reference Distance | 5km | Clear and open area, 2.4kbps |
| Communication Interface | UART Serial Port | 3.3V TTL Level |
Electrical Characteristics
| Electrical Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Operating Voltage | 2.3 | 3.3 | 5.5 | V |
| TX Current | - | 110 | - | mA |
| RX Current | - | 16.8 | - | mA |
| Sleep Current | - | 5 | - | uA |
Advanced Product Features
- Core Technology: New generation LoRa spread spectrum for superior interference resistance.
- Low Power Design: Support for Wake-on-Air (WOR) for battery-powered IoT devices.
- Intelligent Monitoring: Built-in LBT (Listen Before Talk) monitors channel noise to maximize communication success.
- Security: Settable communication keys (non-readable) ensure hardware-level data encryption.
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Reliability: Built-in watchdog timer and automatic configuration recovery after power loss.
Application
Scenario 1: Rural RTK GPS Corrections for Precision Farming
In precision agriculture, maintaining a reliable data link between GPS base stations and irrigation machines or tractors is critical. The E220-900T22D is an ideal choice for this because its 22dBm output and 5km range enable stable transmission of RTK correction data across expansive, uneven farmlands. The DIP package allows for easy integration into existing heavy-duty equipment cabinets using standard SMA-K antennas.
Scenario 2: Battery-Powered Smart Utility Metering (Water/Gas)
Utility meters are often located in hard-to-reach areas like basements or underground vaults, requiring deep penetration and ultra-low power. The E220-900T22S solves this with its Wake-on-Air (WOR) technology and tiny 5uA sleep current. Manufacturers can surface-mount this small module onto compact PCB designs, allowing meters to run on a single battery for up to 10 years while successfully penetrating thick concrete walls.
Scenario 3: Industrial Field Debugging & Prototyping
For IoT engineers developing new industrial control systems, the E220-900T22D serves as a "plug-and-play" wireless bridge. Since it features a standard UART interface and 3.3V/5V power compatibility, engineers can quickly connect it to a breadboard or an Arduino/PLC system during the testing phase. Its hardware-level watchdog and automatic recovery features ensure that the wireless link remains resilient even in high-noise factory environments.
FAQ
1. Can the E220-900T22D communicate with traditional SX1278 or SX1276 (E32 series) modules?
Answer: Mixing different series is not recommended. The E220 series utilizes a new generation of LoRa spread spectrum technology (based on the LLCC68 chip), which has slightly different encoding methods and Spreading Factor (SF) implementations compared to the older SX1278/SX1276 (E32 series). To achieve communication, you must ensure that the frequency, Spreading Factor (SF), Bandwidth (BW), and parity bit are identical on both ends. We recommend using the E220 series consistently within the same system to ensure optimal performance.
2. Why can't I drive the module's serial port directly with a 5V Arduino?
Answer: This is a common mistake that can permanently damage the module. While the E220-900T22D power input (VCC) supports 2.3V - 5.5V, its UART serial logic level is strictly 3.3V. Connecting it directly to a 5V Arduino board (such as the Uno or Mega) may result in the 5V TX signal burning out the module's RX pin. You must use a level shifter circuit (such as a 1k-5k Ω series resistor for voltage reduction) to bring the serial level down to 3.3V.
3. How do I enter Configuration Mode (Command Mode) to modify the frequency or baud rate?
Answer: The module's status is determined by the logic levels of the M0 and M1 pins:
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Configuration Mode: Set both M0 and M1 to High (1). In this mode, the serial port is fixed at 9600bps and wireless transmission is disabled. You can modify parameters using Ebyte configuration software or by sending AT commands.
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Normal Mode: After saving your parameters, you must set both M0 and M1 to Low (0) to enable standard data transmission.
4. What is the actual range in an urban environment compared to the advertised 5km?
Answer: The 5km range is a test result based on Line-of-Sight (LOS) conditions, using a 5dBi antenna gain, a 2.5m installation height, and a 2.4kbps Air Data Rate.
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Actual Performance: In dense urban areas, the effective communication range typically drops to 1km - 2km due to wall penetration and multipath effects.
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Optimization Tips: If the range is insufficient, try lowering the "Air Data Rate" and ensure the antenna is kept away from metal obstacles or installed at a higher outdoor position.
