E22-400T30S SEMTECH LoRa solution wireless serial port module LoRa spread spectrum technology
[Frequency]：410.125～493.125MHz
[Power]：30dBm
[Distance]：10km
[Product weight]：5.7±0.1g
[Size]：25*40.5mm
[Introduction]：E22-400T30S is a wireless serial port module (UART) based on SEMTECH's LoRa solution. It has multiple transmission modes, LoRa spread spectrum technology, TTL level output, and is compatible with 3.3V and 5V IO port voltages.
| Pin No. | Pin Name | Pin Direction | Pin Function |
| 1 | GND | Input | Module ground |
| 2 | VCC | Input | Module power positive reference, voltage range:3.3~5.5V DC |
| 3 | AUX | Output | Used to indicate the working status of the module; |
| For user to wakes up the external MCU and it outputs low level during power-on self^check initialization; (can be left floating) | |||
| 4 | TXD | Output | TTL UART outputs, connects to external RXD input pin. |
| 5 | RXD | Input | TTL UART inputs, connects to external TXD output pin. |
| 6 | Ml | Input (weak pull-up) | Work with MO to decide 4 working modes of module (not float, if not used： could be grounded). |
| 7 | MO | Input (weak pull-up) | Work with Ml to decide 4 working modes of module (not float, if not used： could be grounded). |
| 11 | ANT | Output | Antenna interface (High frequency signal output, 50 ohm characteristic impedance ) |
| 12 | GND | - | Fixed ground |
| 13 | GND | - | Fixed ground |
| 14 | GND | - | Fixed ground |
| 18 | NC | - | NC |
| 19 | NC | - | NC |
| 20 | NC | - | NC |
| 21 | NC | - | NC |
| 22 | RESET | Input | RESET pin when the program is loaded (be left floating, the user does not need to connect) |
| 23 | GND | Input | Ground pin when loading program (be left floating, the user does not need to connect) |
| 24 | NC | - | NC |