E28-2G4M27S 2.4G Lora Transceiver Radio Wireless Module Sx1281 Upgraded Version Lora Transmitter Receiver Modules
[Chip solution]：SX1281
[Frequency]：2.4~2.5GHz
[Transmitter power]：27dBm
[Communication diatance]：8.0km
[Communication Interface]：SPI
[Product 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.E28-2G4M27S is a hardware platform without firmware, so users need to conduct secondary development.
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| 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 SX1281 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 SX1281 Datasheet for details) |
| 13 | DIO1 | Input/Output | GPIO(refer to SX1281 Datasheet for details) |
| 14 | DIO2 | Input/Output | GPIO(refer to SX1281 Datasheet for details) |
| 15 | DIO3 | Input/Output | GPIO(refer to SX1281 Datasheet for details) |
| 16 | GND | - | Ground, connecting to power source reference ground |