[Frequency]：862～931MHz
[Power]：20dBm
[Distance]：5.5km
[Size]：16*26mm
[Feature]：LoRa spread spectrum
[Product weight]：7.6±0.1g
[Introduction]：E32-900T20D is a wireless serial port module based on SEMTECH's LoRa solution. It has a variety of transmission modes, working at 862MHz~931MHz, LoRa spread spectrum technology, and TTL output.
| 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 |
| 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 |
| No. | Item | Direction | Application |
|---|---|---|---|
| 1 | M0 | Input（weak pull-up） | Work with M1 & decide the four operating modes. Floating is not allowed, can be ground. |
| 2 | M1 | Input（weak pull-up） | Work with M0 & decide the four operating modes. Floating is not allowed, can be ground. |
| 3 | RXD | Input | TTL UART inputs, connects to external TXD (MCU, PC) output pin.Can be configured as open-drain or pull-up input |
| 4 | TXD | Output | TTL UART outputs, connects to external RXD (MCU, PC) input pin.Can be configured as open-drain or push-pull output |
| 5 | AUX | Output | To wake up the external MCU, during the procedure of self-check initialization, the pin outputs low level. Can be configured as open-drain output or push-pull output (floating is allowed). |
| 6 | VCC | Input | Power supply 2.3V-5.2V DC |
| 7 | GND | Input | Ground |
| 8 | Fixing hole | - | Fixing hole |
| 9 | Fixing hole | - | Fixing hole |
| 10 | Fixing hole | - | Fixing hole |
