E32-400M20S LoRaTM SMD wireless module
[IC]：SX1278
[Frequency]：410～493MHz
[Power]：20dBm
[Distance]：5km
[Size]：14 * 20 mm
[Introduction]：E32-400M20S is a self-developed, 433/470MHz 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 | ≥5.5 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 |