[IC] : SX1280
[Frequency] : 2.4~2.5GHz
[Power] : 20dBm
[Distance] : 6.0km
[Interface] : SPI
[Weight] : 1.9±0.1g
[Introduction] : E28-2G4M20S is a 2.4GHz bluetooth module designed by Chengdu Ebyte.The IC SX1280 features multiple physical layers and various modulating methods such as LoRa, FLRC and GFSK. The special modulating and processing methods enable longer operating range with LoRa and FLRC modulating, and the GFSK method covers BLE protocol.
| RF Parameter | Value | Remark |
| Working frequency | 2400~2500 MHz | Default: 2.4GHz (52MHz oscillator) |
| Transmitting power | 20 dBm | About 100mW |
| Receiving sensitivity | -132 dBm | Air data rate: 125kbps |
| Air data rate | 0.125M~2Mbps | Default: 125kbps |
| Test distance | 6000m | In open and clear air, with maximum power, 5dBi antenna gain, height of 2m, air data rate: 125kbps |
| Hardware Parameter | Value | Remark |
| Size | 26.5 * 15 mm | |
| Antenna type | IPEX / PCB | |
| Communication interface | SPI | |
| Package | SMD | |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
| Power supply | 1.8 | 3.3 | 3.6 | V | |
| Communication level | 1.8 | 3.3 | 3.6 | V | |
| Transmitting current | 130 | 140 | 150 | mA | 20dBm（100mW） |
| Receiving current | 9 | 10 | 11 | mA | |
| Sleep current | 1 | 2 | 3 | μA | |
| Operating temperature | -40 | 20 | +85 | ℃ | |
| Operating humidity | 10 | 60 | 90 | % | |
| Storage temperature | -40 | 20 | +125 | ℃ |
| Pin No. | Pin Item | Pin Direction | Pin Application |
| 1 | VCC | - | Power supply, 1.8V ~3.6V (recommend to add external ceramic filter capacitor) |
| 2 | GND | - | Ground, connecting to power source reference ground |
| 3 | MISO_TX | Output | SPI data output pin,can be used as UART transmitting pin |
| 4 | MOSI_RX | Input | SPI data input pin,can be used as UART receiving pin |
| 5 | SCK_RTSN | Input | SPI clock input pin,can be used as UART request transmitting pin |
| 6 | NSS_CTS | Input | Module chip selection pin, used to start a SPI communication; and can be used as UART clearing transmitting pin |
| 7 | GND | - | Ground, connecting to power source reference ground |
| 8 | RX_EN | Input | LNA controlling pin. Valid under high level |
| 9 | TX_EN | Input | PA controlling pin. Valid under high level |
| 10 | GND | - | Ground, connecting to power source reference ground |
| 11 | NRESET | Input | Chip reset initiation input pin, valid under low level, built-in 50k pull-up resistor |
| 12 | BUSY | Output | Status indication (refer to SX1280 Datasheet) |
| 13 | DIO1 | Input/Output | Configurable general IO interface (refer to SX1280 Datasheet) |
| 14 | DIO2 | Input/Output | Configurable general IO interface (refer to SX1280 Datasheet) |
| 15 | DIO3 | Input/Output | Configurable general IO interface (refer to SX1280 Datasheet) |
| 16 | GND | - | Ground, connecting to power source reference ground |
| Order online |
| 【eBay】：https://www.ebay.com/usr/cdebyte |
| 【Aliexpress】：https://www.aliexpress.com/store/2798183 |
| 【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 |
