[Communication interface]：UART serial port
[Carrier frequency]：220.125～236.125MHz
[Transmission power]：37dBm
[Communication distance]：25km
[Introduction]：E22-230T37S is a new generation of LoRa wireless module. It is a wireless serial module (UART) based on SX1262 radio frequency chip. It has multiple transmission methods, works in the 230MHz frequency band, TTL level output, and supports 4.5V-15V power supply voltage. The LoRa module adopts a new generation of LoRa spread spectrum technology. Compared with the traditional SX1278 solution, the SX126X is farther, faster, lower power consumption, and smaller; it supports air wake-up, wireless configuration, carrier monitoring, automatic relay, and communication encryption. Key and other functions, support subpackage length setting, and provide customized development services.
| No. | Pin | Pin Direction | Remarks |
| 1 | GND | enter | Module ground |
| 2 | GND | enter | Module ground |
| 3 | VCC | enter | Module power positive reference, voltage range: 4.5~15V DC |
| 4 | VCC | enter | Module power positive reference, voltage range: 4.5~15V DC |
| 5 | RESET | enter | Module reset pin |
| 6 | AUX | output | Used to indicate the working status of the module; the user wakes up the external MCU, and outputs a low level during the initialization of the power-on self-test; (can be suspended) |
| 7 | TXD | output | TTL serial port output, connect to external RXD input pin; |
| 8 | RXD | enter | TTL serial port input, connect to external TXD output pin; |
| 9 | M1 | Input (very weak pull-up) | Cooperate with M0 to determine the 4 working modes of the module (not floating, if not used, it can be grounded) |
| 10 | M0 | Input (very weak pull-up) | Cooperate with M1 to determine the 4 working modes of the module (not floating, if not used, it can be grounded) |
| 11 | GND | enter | Module ground |
| 12 | GND | enter | Module ground |
| 13 | ANT | output | Antenna interface (high frequency signal output, 50B ohm characteristic impedance) |
| 14 | GND | enter | Module ground |
| 15 | GND | enter | Module ground |
| 16 | GND | enter | Module ground |
| 17 | GND | enter | Module ground |
| 18 | GND | enter | Module ground |
| 19 | GND | enter | Module ground |
| 20 | STATE | output | Module status indication output, if not using floating processing |
| 21 | 485-EN | input Output | The enable control pin of the external 485 chip can be suspended if it is not used |
| 22 | NC | Don't care, hang in the air | |
| 23 | NC | Don't care, hang in the air | |
| 24 | NC | Don't care, hang in the air | |
| 25 | SWDlO | Don't care, hang in the air | |
| 26 | SWCLK | Don't care, hang in the air | |
| 27 | GND | enter | Module ground |
| 28 | 3.3V | Don't care, hang in the air |