[Вес изделия]： 2.2±0.1g
[Частота]： 862～930 МГц
[Сила]： 20 дБм
[Расстояние]： 5,5 км
[Размер]： 16*26 мм
[Введение]： E32-900T20S — это модуль беспроводного последовательного порта (UART), основанный на микросхеме SEMTECH SX1276 RF. Он имеет несколько режимов передачи, работающих в диапазоне частот 862–931 МГц, технологию расширенного спектра LoRa, выход TTL.
| Main parameter | Description | Remark |
| Distance for reference | 5500m | Test condition：clear and open area, antenna gain: 5dBi，antenna height: 2.5m，air data rate: 2.4kbps |
| TX length | 58Btye | Maximum capacity of single package, automatic sub-packing after exceeding. |
| Buffer | 512Btye | - |
| Modulation | LoRa™ | - |
| Communication interface | UART | @3.3V,TTL |
| Package | SMD | - |
| Connector | Stamp hole | 1.27mm spacing |
| Size | 16 * 26 mm | - |
| Antenna | IPEX/stamp hole | 50 ohm impedance |
| Main parameter | Min | Typ. | Max. | nit | Remark |
| Operating voltage | 2.3 | 5 | 5.5 | V | ≥5.0 V ensures output power, over 5.5V permanently burned module. |
| Communication level | - | 3.3 | - | V | For 5V TTL, it may be at risk of burning down |
| Operating temperature | -40 | - | +85 | ℃ | Industrial design |
| Operating frequency（ | 862 | 868 | 931 | MHz | Support ISM band |
| Transmitting current | - | 120 | - | mA | Instant power consumption |
| Receiving current | - | 16 | - | mA | - |
| Turn-off current | - | 4 | - | μA | Software is shut down |
| Max Tx power | - | 20 | - | dBm | - |
| Receiving sensitivity | - | -123 | - | dBm | Air data rate is 2.4kbps |
| Pin No. | Pin Item | Pin Direction | Pin Application |
|---|---|---|---|
| 1 | NRST | import | Module reset pin |
| 2 | GND | - | Module ground wire |
| 3 | NC | - | Empty feet |
| 4 | NC | - | Empty feet |
| 5 | NC | - | Empty feet |
| 6 | NC | - | Empty feet |
| 7 | NC | - | Empty feet |
| 8 | GND | - | Module ground wire |
| 11 | GND | - | Module ground wire |
| 12 | ANT | output | Antenna interface (high-frequency signal output, 50 ohm characteristic impedance) |
| 13 | GND | - | Module ground wire |
| 14 | GND | - | Module ground wire |
| 15 | GND | - | Module ground wire |
| 16 | GND | - | Module ground wire |
| 19 | GND | - | Module ground wire |
| 20 | M0 | Input (very weak pull-up) | With M1, determine he four working modes of the module (not suspended, if not grounded) |
| 21 | M1 | Input (very weakpull-up) | With M0, determine the four working modes of the module (not suspended, if not grounded) |
| 22 | RXD | import | TTL serial port input, connected to the external TXD output pin; |
| 23 | TXD | output | TTL, serial port output, connected to the external RXD output pin; |
| 24 | AUX | output | Used to indicate the working state of the module; user awakens external MCU and output low level during self-test initialization (can be suspended) |
| 25 | VCC | - | Module power supply is positive reference, voltage range: 2.7~5.5V DC |
| 26 | GND | - | Module ground wire |
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