The E22-900T22D-V2 is a next-generation SX1262-based LoRa UART module offering 22dBm transmit power and 5km long-range stability, specifically optimized with Forward Error Correction (FEC) and a wide 850-930MHz frequency range for industrial-grade data telemetry.
| Key Parameter | Technical Specification |
|---|---|
| Model Number | E22-900T22D-V2 |
| Core Chip (IC) | Semtech SX1262 LoRa |
| Frequency Range | 850.125 ~ 930.125 MHz (Default 868.125MHz) |
| Transmit Power | 22 dBm (approx. 160mW) |
| Communication Distance | 5,000m (5km) in clear and open area |
| Receiving Sensitivity | -147 dBm (at 0.3kbps air data rate) |
| Operating Voltage | 2.3V ~ 5.5V DC (5.0V recommended for max power) |
| Communication Level | 3.3V TTL (Compatible with 5V logic) |
| Air Data Rate | 0.3kbps ~ 62.5kbps |
| Dimensions | 21 * 36 mm |
| Antenna Interface | SMA-K (50 ohm impedance) |
| Package Type | DIP (Plug-in) |
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Main Parameters
| Product Model & Kit | Antenna Solution | IC Solution | Frequency | Distance |
|---|
| Main Parameters | Performance | Remarks | |
| Min. | Max | ||
| Power supply（V） | 0 | 5.5 | Voltage over 5.5V will cause permanent damage to module |
| Blocking power（dBm） | - | 10 | Chances of burn is slim when modules are used in short distance |
| Operating temperature（℃） | -40 | +85 | - |
Operating parameter
| Main Parameters | Performance | Remarks | ||
| Min. | Typ. | Max. | ||
| Operating voltage（V） | 2.3 | 5.0 | 5.5 | ≥5.0 V ensures output power |
| Communication level（V） | - | 3.3 | - | For 5V TTL, it may be at risk of burning down |
| Operating temperature（℃） | -40 | - | +85 | Industrial design |
| Operating frequency（MHz） | 850.125 | 868.125 | 930.125 | Support ISM band |
| TX Current(mA) | - | 110 | - | Instant power consumption |
| RX current（mA） | - | 11 | - | - |
| Sleep current（μA） | - | 2 | - | Software is shut down |
| Max Tx power（dBm） | 21.5 | 22.0 | 22.5 | - |
| Receiving sensitivity（dBm） | -146 | -147 | -148 | Air data rate 0.3kbps |
| Air data rate（bps） | 0.3k | 2.4k | 62.5k | To control via user’s program |
| Main parameter | Description | Remarks |
| Distance for reference | 5000m | Test condition：clear and open area, antenna gain: 5dBi，antenna height: 2.5m，air data rate: 2.4kbps |
| TX length | 240 Byte | Can be configured via command as 32/64/128/240 bytesper packet to transmit |
| Buffer | 1000 Byte | - |
| Modulation | LORA | - |
| Communication interface | UART | TTL level |
| Package | DIP | - |
| Connector | 1*7*2.54mm | - |
| Size | 21*36 mm | - |
| Antenna | SMA-K | 50 ohm impedance |
Application
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Remote RTK GPS Precision Farming: In agricultural automation, the E22-900T22D-V2 acts as a reliable serial link for RTK correction data. Its 22dBm output and 5km range ensure that autonomous tractors receive precise positioning coordinates even in expansive fields with light foliage, solving the connectivity gaps of standard Wi-Fi.
-
Industrial Smart Utility Metering: For gas and water meter data acquisition in urban environments, the SX1262 core provides superior deep-indoor penetration. The FEC (Forward Error Correction) technology handles high interference in high-density basements, ensuring packet integrity without expensive repeater deployments.
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Oil & Gas Pipeline Telemetry: Operating in harsh environments (-40 to +85°C), the module provides a resilient TTL link for remote pressure sensors. Its 850-930MHz sub-GHz frequency band facilitates diffraction around metallic structures, maintaining 5km telemetry links in complex industrial refineries.
FAQ
Q: How does the SX1262 core in the E22-900T22D-V2 improve receive sensitivity compared to the older SX127x series?
A: The E22-900T22D-V2 utilizes the enhanced LNA (Low Noise Amplifier) path of the SX1262 IC, achieving a sensitivity down to -147dBm at 0.3kbps. This significantly increases the total link budget without increasing power consumption, allowing for stable communication in weak signal environments where signal-to-noise ratios are well below the noise floor.
Q: What is the risk of using 5V TTL logic directly with the module's communication pins?
A: Although the power supply pin is compatible up to 5.5V, the RXD/TXD communication levels are rated at 3.3V. Connecting to a 5V MCU without a logic level shifter or current-limiting resistor risks permanent latch-up damage to the internal CMOS gate of the SX1262. For 5V industrial systems, it is critical to use a bidirectional level shifter to maintain signal integrity and hardware longevity.
Q: What impact does the Forward Error Correction (FEC) algorithm have on data throughput and reliability?
A: When FEC is enabled on the E22-900T22D-V2, the module automatically appends redundant error-correction bits to each data packet. While this reduces the effective airspeed throughput by approximately 25 percent, it allows the module to proactively correct multi-bit errors caused by sudden interference, drastically reducing the need for retransmissions in noisy industrial RF environments.
Q: Can the peak current of 110mA during transmission be managed with standard coin-cell batteries?
A: Due to the 22dBm (160mW) output power, the peak TX current reaches 110mA. Standard coin cells like CR2032 have high internal resistance and cannot sustain this burst current without a significant voltage drop. For battery-powered applications, we recommend a minimum 100uF low-ESR tantalum capacitor in parallel or using high-discharge lithium-thionyl chloride batteries to handle the power amplifier's transient requirements.
