[IC] : SX1280
[Frequency] : 2.4~2.5GHz
[Power] : 12.5dBm
[Distance] : 3.0km
[Interface] : UART
[Weight] : 2.2±0.1g
[Introduction] : E28-2G4T12S is an UART module based on SEMTECH SX1280, 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.
| 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 | 5.0 | 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 | ℃ | - |
| Pin No. | Pin Item | Pin Direction | Pin Application |
| 1 | GND | Ground | Ground |
| 2 | NC | - | Disconnected |
| 3 | M0 | Input | M2, M1 and M0 jointly decide the 8 operation modes. (cannot be floated, can be grounded if not used) |
| 4 | M1 | Input | M2, M1 and M0 jointly decide the 8 operation modes. (cannot be floated, can be grounded if not used) |
| 5 | M2 | Input | M2, M1 and M0 jointly decide the 8 operation modes. (cannot be floated, can be grounded if not used) |
| 6 | RXD | Input | TTL serial input, connected to external TXD output pin. Can be configured as open-drain or pull-up input, please refer to parameter configuration. |
| 7 | TXD | Output | TTL serial output, connected to external RXD input pin Can be configured open-drain or push-pull output, please refer to parameter configuration. |
| 8 | AUX | Output | Used to indicate the module operation status, when user wakes up the external MCU, it outputs low level during initialization after power on and self-check, can be configured as open-drain output or push-pull output, please refer to parameter configuration. (can be floated) |
| 9 | VCC | - | Module power source positive reference. Voltage range: 2.3 ~ 5.5V DC |
| 10~11 | GND | Ground | Ground |
| 12~19 | NC | - | Disconnected |
| 20 | GND | Ground | Ground |
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| 【Alibaba】：https://www.alibaba.com |
| For batch order/customized product |
| 【Sales hotline】：+86-28-61399028 Ext.812 |
| 【E-mail】：service@cdebyte.com |
| Technical support |
| 【Submit online】：http://www.ebyte.com/en/apple-technology.aspx |
| 【E-mail】：support@cdebyte.com |
| Model | IC | Interface | Frequency Hz | Power dBm | Distance km | Air data rate | Package | Size (mm) | Feature | Manual | Sample |
|---|---|---|---|---|---|---|---|---|---|---|---|
| E28-2G4T27SX | UART | SX1281 | 2.4G | 27 | 7 | 1k ~ 2M | SMD | 40.5*25 | LoRa spread spectrum, high-speed continuous transmission | ||
| E28-2G4M27S | SPI | SX1280 | 2.4G | 27 | 8 | 0.125M~2M | SMD | 15 * 26.5 | LoRa spread spectrum,FLRC | ||
| E28-2G4T12S | UART | SX1280 | 2.4G | 12.5 | 3 | 1k ~ 2M | SMD | 17.5* 28.7 | LoRa spread spectrum | ||
| E28-2G4M20S | SPI | SX1280 | 2.4G | 20 | 6 | 0.125M~2M | SMD | 15 * 26.5 | LoRa spread spectrum,FLRC | ||
| E28-2G4M12S | SPI | SX1280 | 2.4G | 12.5 | 3 | 0.125M~2M | SMD | 14*25 | LoRa spread spectrum,FLRC |
