The E22-900T30D is a high-power 30dBm LoRa UART module based on the Semtech SX1262 chip, engineered for ultra-long-range (10km) industrial telemetry across the 868/915MHz bands with full 3.3V/5V TTL logic compatibility.
| Parameter | Technical Specification |
|---|---|
| Model Number | E22-900T30D |
| Core Chip (IC) | Semtech SX1262 |
| Frequency Range | 850.125 ~ 930.125 MHz (Sub-1GHz) |
| Transmit Power | 30 dBm (1W) |
| Communication Distance | 10 km |
| Interface Type | UART (TTL Level, 3.3V/5V Compatible) |
| Package Type | DIP (24 * 43 mm) |
| Weight | 11 ± 0.2g |
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【Pcb-lib】E22-900T30D
Manual
Application Note
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Application
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Remote Oil & Gas Pipeline Monitoring: In vast oil fields where cellular coverage is non-existent, the E22-900T30D utilizes its 30dBm (1W) high-power penetration and SX1262 LoRa modulation to transmit pressure and flow data across a 10km radius, effectively bypassing topographical obstacles and ensuring reliable telemetry.
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Industrial Automation & Smart Mining: The module's TTL level compatibility with both 3.3V and 5V systems allows for direct integration into legacy PLCs and modern MCU gateways. Its robust anti-interference spread-spectrum technology ensures critical control signals reach heavy machinery in electrically noisy underground mining environments.
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Smart City Utility Metering: For urban water and gas grids, the E22-900T30D solves the "deep indoor" penetration challenge. The long-range capability allows a single base station to aggregate data from thousands of meters within high-density residential blocks, significantly reducing infrastructure deployment costs.
FAQ
Q: How does the SX1262 core in the E22-900T30D handle the high instantaneous current during 30dBm transmission?
A: The E22-900T30D incorporates a high-efficiency power amplifier circuit optimized for the SX1262. During 30dBm (1W) transmission, the peak current can reach 600mA or more. It is recommended to use a high-stability power supply with low ripple and sufficient decoupling capacitors (minimum 100uF) near the VCC pin to prevent voltage dips that could lead to module reset or frequency drift.
Q: What are the impedance matching requirements for the antenna port to maintain the 10km link budget?
A: The RF output of the E22-900T30D is matched to a standard 50-ohm characteristic impedance. To achieve the 10km distance, engineers should ensure that the antenna feedline maintains a 50-ohm microstrip or coaxial path. Using an antenna with a Voltage Standing Wave Ratio (VSWR) below 1.5 is critical to minimize power reflection, which otherwise would reduce the effective radiated power and increase thermal stress on the PA.
Q: How does the module's 3.3V/5V TTL compatibility impact logic level integration in industrial environments?
A: The module's UART interface employs an internal level-clamping and threshold-detection circuit. This allows IoT engineers to connect the TXD/RXD pins directly to a 5V industrial PLC serial port or a 3.3V low-power ARM microcontroller without the need for external level shifters. This bi-directional compatibility ensures that the logic '1' and '0' voltage levels remain within safe CMOS/TTL thresholds while maintaining signal integrity against common-mode noise.
