[IC] : SX1280
[Frequency] : 2.4~2.5GHz
[Power] : 12.5dBm
[Distance] : 3.0km
[Interface] : SPI
[Weight] : 1.6±0.1g
[Introduction] : E28-2G4M12S is a 2.4GHz bluetooth module designed by Chengdu Ebyte. With built-in PCB antenna, it adopts the original RFIC SX1280 of Semtech, it works at 2.400 ~ 2.500GHz with ultra-low power consumption. It is applicable for smart home, security system & etc.
| RF Parameter | Value | Remark |
| Working frequency | 2400~2500 MHz | Default: 2.4GHz (52MHz oscillator) |
| Transmitting power | 12.5 dBm | About 18mW |
| Receiving sensitivity | -130 dBm | Air data rate: 125kbps |
| Air data rate | 0.125M~2Mbps | Default: 125kbps |
| Test distance | 3000m | In open and clear air, with maximum power, 5dBi antenna gain, height of 2m, air data rate: 125kbps |
| Hardware Parameter | Value | Remark |
| Size | 24*15mm | |
| 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 | 42 | 45 | 50 | mA | 12.5dBm（18mW） |
| 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 | GND | - | Ground, connecting to power source reference ground |
| 9 | NRESET | Input | Chip reset initiation input pin, valid under low level, built-in 50k pull-up resistor |
| 10 | BUSY | Output | Status indication (referto SX1280 Datasheet) |
| 11 | DIO1 | Input/Output | Configurable general IO interface (refer to SX1280 Datasheet) |
| 12 | DIO2 | Input/Output | Configurable general IO interface (refer to SX1280 Datasheet) |
| 13 | DIO3 | Input/Output | Configurable general IO interface (refer to SX1280 Datasheet) |
| 14 | 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 |
