[Product weight]：1.7±0.1g
[IC]：SX1278
[Frequency]：410～493MHz
[Power]：20dBm
[Distance]：5km
[Size]：14 * 20 mm
[Introduction]：E32-400M20S is a self-developed, 410/493MHz LoRa TM SMD wireless module with the maximum transmission power of 1W which is based on the SX1278 produced by Semtech in the United States.
| Main parameter | Description | Remark |
| Reference distance | 5km | Test condition：clear and open area, antenna gain: 5dBi，antenna height: 2m，air data rate: 2.4 kbps |
| FIFO | 256Byte | Maximum length of single send |
| Crystal Oscillator | 32MHz | |
| Protocol | LoRaTM(recommended) | FSK/GFSK/MSK/GMSK/OOK |
| Package | SMD | |
| Interface | 1.27mm | Sample hole |
| Communication interface | SPI | 0～10Mbps |
| Size | 14 * 20 mm | - |
| Antenna | Sample hole / IPEX | 50 ohm impedance |
| Main parameter | Min | Type | Max | Unit | Remark |
| Operating voltage | 1.8 | 3.3 | 3.6 | V | ≥3.3 V ensures output power |
| Communication level | - | 3.3 | - | V | - |
| Operating temperature | -40 | - | +85 | ℃ | Industrial grade |
| Operating frequency | 410 | - | 493 | MHz | - |
| TX current | - | 110 | - | mA | - |
| RX current | - | 17 | - | mA | - |
| Sleep current | - | 2 | - | μA | - |
| Max TX power | - | 20 | - | dBm | - |
| Receiving sensitivity | -145 | -147 | -148 | dBm | Air data rate is 1.2 kbps |
| Pin No. | Item | Direction | Description | |
|---|---|---|---|---|
| 1 | GND | - | Ground | |
| 2 | GND | - | Ground | |
| 3 | GND | - | Ground | |
| 4 | GND | - | Ground | |
| 5 | GND | - | Ground | |
| 6 | RXEN | Input | RF switch receiving control pin, connected to external MCU IO, high level effective | |
| 7 | TXEN | Input | RF switch receiving control pin, connected to external MCU IO, high level effective | |
| 8 | DIO2 | Input/Output | General IO port (see SX1276 manual for details) | |
| 9 | VCC | - | Power supply, range 3.3 ~ 5.5V (external ceramic filter capacitor is recommended) | |
| 10 | GND | - | Ground | |
| 11 | GND | - | Ground | |
| 12 | GND | - | Ground | |
| 13 | DIO3 | Input/Output | General IO port (see SX1276 manual for details) | |
| 14 | DIO4 | Input/Output | General IO port (see SX1276 manual for details) | |
| 15 | DIO5 | Input/Output | General IO port (see SX1276 manual for details) | |
| 16 | GND | - | Ground | |
| 17 | DIO1 | Input/Output | General IO port (see SX1276 manual for details) | |
| 18 | DIO0 | Input/Output | General IO port (see SX1276 manual for details) | |
| 19 | RST | Input | Chip reset trigger input pin | |
| 20 | MISO | Output | SPI data output pin | |
| 21 | MOSI | Input | SPI data output pin | |
| 22 | SCK | Input | SPI data output pin | |
| 23 | NSS | Input | the module chip selects the pin used to start an SPI communication | |
| 24 | GND | - | Ground | |
| 25 | ANT | - | Antenna interface, Sample hole (50Ω characteristic impedance) | |
| 26 | GND | - | Ground |
