[Chip solution]：SX1268
[Carrier frequency]：410~493MHz
[Power]：33dBm
[Communication interface]：SPI
[Communication distance]：16km
[Product size]：24*38.5mm
[Introduction]：E22-400M33S is based on the new generation of LoRaTM RF chip SX1268 produced by Semtech in the United States as the core of independent research and development of the maximum power of 2W and suitable for 433/470MHz SMD LoRaTM wireless module, using industrial-grade high-precision 32MHz crystal oscillator.
| Pin Serial Number | Pin Name | Pin Orientation | Pin Usage |
| 1 | GND | - | Ground wire, connected to power reference ground |
| 2 | GND | - | Ground wire, connected to power reference ground |
| 3 | GND | - | Ground wire, connected to power reference ground |
| 4 | GND | - | Ground wire, connected to power reference ground |
| 5 | GND | - | Ground wire, connected to power reference ground |
| 6 | RXEN | Input | RF switch receive control pin, connected to external microcontroller IO, active high |
| 7 | TXEN | Input | RF switch transmit control pin, connected to external microcontroller |
| 8 | DIO2 | Input/Output | Configurable general-purpose IO ports (see SX1268 manual for details) |
| 9 | VCC | - | Power supply, range 3.3 to 5.5V (it is recommended to increase the |
| 10 | VCC | - | Power supply, range 3.3 to 5.5V (it is recommended to increase the |
| 11 | GND | - | Ground wire, connected to power reference ground |
| 12 | GND | - | Ground wire, connected to power reference ground |
| 13 | DIO1 | Input/Output | Configurable general-purpose IO ports (see SX1268 manual for details) |
| 14 | BUSY | Output | For status indication (see SX1268 manual for details) |
| 15 | NRST | Input | Chip reset trigger Input pin, active low |
| 16 | MISO | Output | SPI Data Output Pin |
| 17 | MOSI | Input | SPI Data Input Pin |
| 18 | SCK | Input | SPI Data Input Pin |
| 19 | NSS | Input | Module chip select pin to start an SPI communication |
| 20 | GND | - | Ground wire, connected to power reference ground |
| 21 | ANT | - | Antenna connector, stamp hole (50Ω characteristic impedance) |
| 22 | GND | - | Ground wire, connected to power reference ground |