E28-2G4M12S Smart Watch Sx1281 Home 2.4ghz Module Lora Wan Parking Sensor module RoHS
[Chip solution]：SX1281
[Frequency]：2.4~2.5GHz
[Transmitter power]：12.5dBm
[Communication distance]：3.0km
[Communication Interface]：SPI
[Product weight]：1.6±0.1g
[Introduction]：E28-2G4M12SX is a 2.4GHz radio frequency transceiver module designed and produced by Ebyte Company. It has long communication distance and extremely low current consumption in low power consumption mode. This module is a small size chip type (pin pitch 1.27mm). This series uses 52MHz industrial-grade high-precision low-temperature drift active crystal oscillator to ensure its industrial characteristics and stable performance.
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| No. | Pin item | Pin direction | 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 selection pin, used to start a SPI chip 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(refer to SX1281 Datasheet) |