Ebyte SI4438 UART 2.5Km Range 433MHz 22dBm SMD 16*26mm CE RoHs FCC LoRa Wireless Transmitter RF Module
[IC]：SI4438
[Frequency]：425~450.5MHz
[Power]：10~20dBm
[Distance]：2.5km
[Interface]：UART
[Weight]：2.0±0.1g
[Introduction]：E30-433T20S3 is a UART module based on Silicon Labs' SI4438. It features half-duplex with transparent transmission, SMD packing, TTL level output, WOR and 433MHz working frequency. This product has been mass-produced and can be used in a wide range of environments and industries.
| RF Parameter | Value | Remark |
|---|---|---|
| Working frequency | 425~450.5 MHz | Support ISM band |
| Transmitting power | 10~20 dBm | Default: 20dBm（About 100mW） |
| Receiving sensitivity | -114 dBm | Air data rate: 1k bps |
| Air data rate | 1k~25k bps | Default: 1k bps |
| Test distance | 2500m | In open and clear air, with maximum power, 5 dBi antenna gain, height of 2m, air data rate: 1k bps |
| Hardware Parameter | Value | Remark |
|---|---|---|
| Size | 16 * 26 mm | - |
| Antenna type | IPEX/External | - |
| Communication interface | UART | Baud rate: 1200~115200, default: 9600 |
| Package | SMD | - |
| Buffer | 512 bytes buffer | Automatically sub-packaging with 58 bytes per package |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
|---|---|---|---|---|---|
| Power supply | 2.3 | 5.0 | 5.0 | V | - |
| Communication level | - | 3.3 | - | V | - |
| Transmitting current | - | 89 | - | mA | 20dBm（100mW） |
| Receiving current | - | 16 | - | mA | - |
| Sleep current | - | 4 | - | μA | - |
| Operating temperature | -40 | 20 | +85 | ℃ | - |
| Operating humidity | 10 | 60 | 90 | % | - |
| Storage temperature | -40 | 20 | +125 | ℃ | - |
