E28-2G4M27SX 2.4GHz SX1281 RF transceiver module,Extremely low current consumption in low-power mode
[Product weight]：1.5±0.1g
[Chip]：SX1281
[Power:]：27dBm
[Communication distance]：8km
[Size]：15*20mm
[Introduction]：E28-2G4M27SX is a 2.4GHz RF transceiver lora module designed and produced by Ebyte based on the SX1281 chip, with a transmit power of 500mW, SPI interface, and extremely low current consumption in low-power mode;the module is a small-volume SMD type (pin spacing 1.27mm) , using 52MHz industrial-grade high-precision low-temperature drift crystal oscillator to ensure its industrial characteristics and its stable performance.
| Serial Number | Pin | Pin direction | Remark |
| 1 | VCC | - | Power supply, range 2.5~3.6V (it is recommended to add external ceramic filter capacitors) |
| 2 | GND | - | Ground wire, connected to the power reference ground |
| 3 | MISO_TX | output | SPI data output pin; can also be used as UART transmit pin (see SX1281 manual for details) |
| 4 | MOSI_RX | enter | SPI data input pin; can also be used as UART receiving pin (see SX1281 manual for details) |
| 5 | SCK_RTSN | enter | SPI clock input pin; can also be used for UART request transmission pin (see SX1281 manual for details) |
| 6 | NSS_CTS | enter | The module chip select pin is used to start an SPI communication; it can also be used to clear the UART transmit pin (see the SX1281 manual for details) |
| 7 | GND | - | Ground wire, connected to the power reference ground |
| 8 | RX_EN | enter | LNA control pin, active high level |
| 9 | TX_EN | enter | PA control pin, active high level |
| 10 | GND | - | Ground wire, connected to the power reference ground |
| 11 | NRESET | enter | Chip reset trigger input pin, active low level, built-in pull-up resistor 50k |
| 12 | BUSY | output | Used for status indication (see SX1281 manual for details) |
| 13 | DIO1 | input/output | Configurable general-purpose IO port (see SX1281 manual for details) |
| 14 | DIO2 | input/output | Configurable general-purpose IO port (see SX1281 manual for details) |
| 15 | DIO3 | input/output | Configurable general-purpose IO port (see SX1281 manual for details) |
| 16 | GND | - | Ground wire, connected to the power reference ground |