[Chip solution]:-
[Frequency]:220.125~236.125MHz
[Transmitter power]:22dBm
[Communication diatance]:5km
[Size]:36*21mm
[Product weight]:7.6±0.1g
[Introduction]:E22-230T22D is a new generation of LoRa wireless module. It is a wireless serial port module (UART) based on SEMTECH's LoRa solution radio frequency chip. It has a variety of transmission methods and works in the (220.125~236.125MHz) frequency band (default 230.125MHz). LoRa spread spectrum technology, TTL level output, compatible with 3.3V and 5V IO port voltages.
| Serial Number | pin | Pin direction | Remark |
| 1 | M0 | Input (very weak pull-up) | In conjunction with M1, it determines the module's four operating modes (it cannot be left floating; if not in use, it can be grounded). |
| 2 | M1 | Input (very weak pull-up) | In
conjunction with M0, it determines the module's four operating modes
(it cannot be left floating; if not in use, it can be grounded). |
| 3 | RXD | Input | TTL serial port input, connected to the external TXD output pin; |
| 4 | TXD | Output | TTL serial port output, connected to the external RXD input pin; |
| 5 | TO | Output | Used to indicate the module's working status; When the user wakes up the external MCU, it outputs a low level during the power-on self-test initialization period; (this level can be left floating). |
| 6 | VCC | Input | Module power supply positive reference, voltage range: 3.0~5.5V DC |
| 7 | GND | Input | Module ground wire |
| 8 | Fixing hole | Mounting hole (connected to GND on the module) | |
| 9 | Fixing hole | Mounting hole (connected to GND on the module) | |
| 10 | Fixing hole | Mounting hole (connected to GND on the module) |