[IC] : SX1280
[Frequency] : 2.4~2.5GHz
[Power] : 27dBm
[Distance] : 8.0km
[Interface] : SPI
[Weight] : 1.7±0.1g
[Introduction] : E28-2G4M27S is a 2.4GHz small SMD module (pin spacing 1.27mm)designed by Chengdu Ebyte. With built-in PCB antenna, SPI interface, it owns TX power of 500mW with power consumption.
| RF Parameter | Value | Remark |
| Working frequency | 2400~2500 MHz | ISM band |
| Transmitting power | 27 dBm | About 500mW |
| Receiving sensitivity | -132 dBm | Air data rate: 595kbps |
| Air data rate | LoRa(bps)：0.595k~253.9k FLRC(bps)：260k~1.3M GFSK(bps)：125k~2M | Defined by user via programming |
| Test distance | 8000m | Test condition：clear and open area, antenna gain: 5dBi， antenna height: 2.5m，air data rate: 1kbps |
| Hardware Parameter | Value | Remark |
| Size | 26.5 * 15 mm | - |
| Antenna type | IPEX / PCB | 50Ω Impedance |
| Communication interface | SPI | 0～10Mbps |
| Package | SMD | - |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
| Power supply | 2.5 | 3.3 | 3.6 | V | ≥3.3 V ensures output power |
| Communication level | - | 3.3 | - | V | For 5V TTL, it may be at risk of burning down |
| Transmitting current | - | 580 | - | mA | Instant power consumption |
| Receiving current | - | 14.5 | - | mA | - |
| Sleep current | - | 2.0 | - | 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 | VCC | - | Power supply, 2.5V ~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(refer to SX1280 Datasheet for details) |
| 7 | GND | - | Ground, connecting to power source reference ground |
| 8 | RX_EN | Input | LNA control pin，valid in high level |
| 9 | TX_EN | Input | PA control pin，valid in 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 | For status indication(refer to SX1280 Datasheet for details) |
| 13 | DIO1 | Input/Output | GPIO(refer to SX1280 Datasheet for details) |
| 14 | DIO2 | Input/Output | GPIO(refer to SX1280 Datasheet for details) |
| 15 | DIO3 | Input/Output | GPIO(refer to SX1280 Datasheet for details) |
| 16 | GND | - | Ground, connecting to power source reference ground |
| Order online |
| 【eBay】：https://www.ebay.com/usr/cdebyte |
| 【Aliexpress】：https://cdebyte.pt.aliexpress.com |
| 【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 |
