E220-900T22S is a new generation of LoRa wireless serial port module (UART), based on Semtech's original design. It has a variety of transmission methods, works in the (850.125～930.125MHz) frequency band (default 873.125MHz), LoRa spread spectrum technology, TTL level output, compatible with 3.3V and 5V IO port voltage.
[IC]：LLCC68
[Frequency]：850.125~930.125MHz
[Power]：22dBm
[Distance]：5km
[Size]：16*26mm
[Product weight]：2.2g±0.1g
| Main parameter | Performance | Remark |
|---|---|---|
| Operating frequency | 850.125~930.125MHz | Support ISM band |
| Tx power | 22 dBm | - |
| Receiving sensitivity | -129dbm | - |
| Air data rate | 2.4k~62.5kbps | Controlled via user’s programming |
| Distance for reference | 5km | Test condition：clear and open area, antenna gain: 5dBi，antenna height: 2.5m，air data rate: 2.4kbps |
| Main parameter | Performance | Remark |
|---|---|---|
| Size | 16 * 26 mm | - |
| Antenna | IPEX/stamp hole | 50 ohm impedance |
| Communication interface | UART | TTL Level |
| Package | SMD | - |
| Main parameter | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|
| Operating voltage | 2.3 | 3.3 | 5.5 | V | ≥3.3 V ensures output power |
| Communication level | - | 3.3 | - | V | For 5V TTL, it may be at risk of burning down |
| TX current | - | 110 | - | mA | Instant power consumption @22dBm |
| RX current | - | 11 | - | mA | - |
| Sleep current | - | 2 | - | uA | Software is shut down |
| Operating temperature | -40 | 20 | +85 | ℃ | Industrial design |
Practical Application Scenarios
Smart Agricultural Environmental Monitoring
Regional agricultural projects often span vast areas where standard Wi-Fi cannot reach and cellular data is too expensive. By integrating the E220-900T22S into soil moisture and weather station nodes, developers can utilize its 5km LoRa spread spectrum range to transmit daily environmental telemetry back to a central farmhouse gateway. The module's low power consumption ensures that battery or solar-powered sensors can run for years without maintenance.
Legacy Factory Automation and Sensor Upgrades
Many existing industrial facilities rely on legacy PLCs and sensors that use standard 5V logic. Upgrading these to wireless networks usually requires complex voltage level-shifting circuits. The E220-900T22S natively supports both 3.3V and 5V IO port voltages. Engineers can connect this module directly to older 5V microcontrollers and sensors via UART, instantly transforming wired RS232/RS485 systems into a modern, wireless LoRa network with zero extra hardware overhead.
Smart Utility Metering (Water and Gas)
Municipal utility companies require highly reliable, low-cost wireless modules for Advanced Metering Infrastructure (AMI). Operating in the widely accepted 868MHz (Europe) and 915MHz (North America) bands, the Semtech LLCC68-based E220 module provides an optimized balance between cost and performance. It allows thousands of smart water and gas meters located in residential basements or outdoor enclosures to transmit usage data reliably to neighborhood data collectors, bypassing physical concrete barriers.
FAQ Section
What is the main advantage of the Semtech LLCC68 chip compared to older LoRa chips?
The Semtech LLCC68 is designed as a new-generation, cost-optimized LoRa transceiver. It is fully compatible with standard LoRa networks but is specifically tailored for medium-range, high-volume IoT applications. It maintains excellent receiver sensitivity and anti-interference capabilities while reducing the overall hardware cost, making it perfect for massive deployments like smart metering and asset tracking.
Do I need an external level shifter to connect this module to a 5V Arduino or PLC?
No external level shifting is required. The E220-900T22S features a built-in IO level adaptation circuit that is natively compatible with both 3.3V and 5V TTL logic. You can wire the TX and RX pins directly to standard 5V microcontrollers (like an Arduino Uno) or industrial 5V sensors without worrying about burning out the module's logic pins.
Can I use this module in both Europe and North America?
Yes, the hardware supports a wide frequency range from 850.125 MHz to 930.125 MHz. Through simple AT commands or software configuration, you can set the module to operate at 868 MHz to comply with European CE standards, or at 915 MHz to comply with North American FCC regulations. The module itself has already passed FCC, CE, and RoHS certifications.
What is the default transmission method of this UART module?
The module operates using a transparent transmission method by default. This means it acts as a "wireless cable"—whatever serial data you input into the UART pin of the transmitting module will be output exactly as is from the UART pin of the receiving module, making it incredibly easy to integrate into existing serial communication systems.
