E28-2G4M12SX SX1280 chip LoRa module
[Chip solution]：SX1280
[Transmission power]：12.5dBm
[Communication distance]： 3km
[Communication interface]：SPI
[Introduction]：E28-2G4M12SX is a 2.4GHz RF transceiver module designed and produced by Ebyte, with long communication distance and extremely low current consumption in low power consumption mode. This module is a small-volume patch type (pin pitch 1.27mm). This series adopts 52MHz industrial-grade high-precision low-temperature drift active crystal oscillator; it guarantees its industrial characteristics and its stable performance. Using Semtech's SX1280 RF chip, this chip contains a variety of physical layers and a variety of modulation methods, such as LORA, FLRC, GFSK. It can be used in smart homes, security systems, location tracking, wireless ranging, wearable devices, smart bracelets and health management, etc.
| serial number | Pin | Pin Direction | Remarks |
| 1 | VCC | - | Power supply, range 1.8~3.6V (it is recommended to add ceramic filter capacitors externally) |
| 2 | GND | - | Ground wire, connected to the power reference ground |
| 3 | MISO_TX | output | SPI data output pin; can also be used as UART launch pin (see SX1280 manual for details) |
| 4 | MOSI_RX | enter | SPI data input pin; can also be used as UART receive pin (see SX1280 manual for details) |
| 5 | SCK_RTSN | enter | SPI clock input pin; can also be used for UART request launch pin (see SX1280 manual for details) |
| 6 | NSS_CTS | enter | Module chip select pin, used to start a SPI communication; can also be used for UART clear launch pin (see SX1280 manual for details) |
| 7 | GND | - | Ground wire, connected to the power reference ground |
| 8 | GND | - | Ground wire, connected to the power reference ground |
| 9 | NRESET | enter | Chip reset trigger input pin, active low, built-in pull-up resistor 50k |
| 10 | BUSY | output | For status indication (see SX1280 manual for details) |
| 11 | DIO1 | input Output | Configurable general-purpose IO port (see SX1280 manual for details) |
| 12 | DIO2 | input Output | Configurable general-purpose IO port (see SX1280 manual for details) |
| 13 | DIO3 | input Output | Configurable general-purpose IO port (see SX1280 manual for details) |
| 14 | GND | - | Ground wire, connected to the power reference ground |