E22-400T22D wireless serial port module UART TTL level output compatible with 3.3V and 5V IO port voltage
[IC]：SX1268
[Frequency]：410.125~493.125MHz
[Power]：22dBm
[Distance]：5km
[Size]：21*36mm
[Weight]：6.7±0.2g
[Introduction]：E22-400T22D is a wireless serial port module (UART) based on SEMTECH's SX1268 RF chip. It has multiple transmission modes, working in the 410.125MHz~493.125MHz, frequency (default 433.125MHz), LoRa spread spectrum technology, TTL level output, compatible with 3.3V and 5V IO port voltage.
| No. | Name | Direction | Function |
|---|---|---|---|
| 1 | M0 | Input（weak pull-up） | Work with M1 to decide 4 working modes of module (not suspended, if not used, could be grounded). |
| 2 | M1 | Input（weak pull-up） | Work with M0 to decide 4 working modes of module (not suspended, if notused, could be grounded). |
| 3 | RXD | Input | TTL UART input, connects to external TXD output pin. |
| 4 | TXD | Output | TTL UART output, connects to external RXD input pin. |
| 5 | AUX | Output | To indicate module ’s working status & wakes up the external MCU. Duringthe procedure of self-check initialization, the pin outputs low level. |
| 6 | VCC | Power supply | Module power supply positive reference, voltage range: 2.3 ～ 5.5V DC |
| 7 | GND | Power supply | Ground |
| 8 | Fixed hole | - | Fixed hole（Connect to GND on the module） |
| 9 | Fixed hole | - | Fixed hole（Connect to GND on the module） |
| 10 | Fixed hole | - | Fixed hole（Connect to GND on the module） |