Ebyte Semtech SX1281 UART 3Km Range 2.4GHz 12dBm SMD 17.5*28.7mm CE FCC LoRa Wireless Transmitter RF Module
[IC]：SX1281
[Frequency]：2.4~2.5GHz
[Power]：12.5dBm
[Distance]：3.0km
[Interface]：UART
[peso]：2.2±0.1g
[Introducción]：E28-2G4T12S is an UART module based on SEMTECH SX1281, it adopts transparent transmission and works at 2.4GHz band. It adopts LoRa, FLRC and GFSK modulations. It features SMD packing with both IPX and PCB antenna interfaces, and its TTL output is 3.3V.
Tienda oficial| RF Parameter | Value | Remark |
| Working frequency | 2400~2500 MHz | ISM band |
| Transmitting power | 12.5 dBm | - |
| Receiving sensitivity | -132 dBm | Air data rate: 1.0kbps |
| Modulation | LoRa | - |
| FLRC | ||
| GFSK | ||
| Test distance | 3000m | Test condition：clear and open area, antenna gain: 5dBi，antenna height: 2.5m，air data rate: 1kbps |
| Hardware Parameter | Value | Remark |
| Size | 17.5 * 28.7 mm | - |
| Antenna type | IPEX / PCB | 50Ω Impedance |
| Communication interface | UART | TTL |
| Package | SMD | - |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
| Power supply | 2.3 | 5 | 5.5 | V | ≥5.0V ensures output power |
| Communication level | - | 3.3 | - | V | For 5V TTL, it may be at risk of burning down |
| Transmitting current | - | 46 | - | mA | Instant power consumption |
| Receiving current | - | 20 | - | mA | - |
| Sleep current | - | 8 | - | μA | Software is shut down |
| Operating temperature | -40 | 20 | 85 | ℃ | - |
| Operating humidity | 10 | 60 | 90 | % | - |
| Storage temperature | -40 | 20 | 125 | ℃ | - |