EWM22A-400BWL22S BLE/WiFi/LoRa All-in-one wireless module support Remote configuration Relay networking Low power consumption
[Communication Interface]：UART
[Frequency]：2.4GHz + 433MHz
[Communication Protocol]：BLE/Wi-Fi/LoRa
[Communication diatance]：0.5km/5km
[Size]：14*20mm
[Product weight]：1.2 ± 0.1g
[Introduction]：EWM22A-400BWL22S is a BLE, WIFI, and LoRa all-in-one wireless data transmission module developed by Chengdu Ebyte. This series of wireless modules supports BLE, WIFI, and LoRa communications. The LoRa function is compatible with the E22X series modules. It is a SMD type, with a maximum BLE/WIFI transmission power of 20dBm and a LoRa transmission power of 22dBm. The pin spacing is 1.27mm, and it comes with factory-installed firmware. It is powerful and mainly suitable for data transmission application scenarios.
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| Pin number | Pin Name | Pin direction | Pin Purpose |
| 1 | GND | - | Power Ground |
| 2 | ON | - | LoRa antenna interface, 50 ohm characteristic impedance |
| 3 | GND | - | Power Ground |
| 4 | GND | - | Power Ground |
| 5 | TX_EN | - | Reserved pins |
| 6 | RX_EN | - | Reserved pins |
| 7 | LINK | Output | Bluetooth/WIFI connection status indication pin: BLE: high level by default, low level when BLE is connected; |
| WIFI: Default high level, WIFI is connected, TCP is not connected, output 1Hz high and low level changes, TCP is connected, output low level. | |||
| 8 | WAKE | input | Deep sleep wake-up pin, low level wake-up. |
| 9 | NC | Input/Output | Reserved pins |
| 10 | NC | Input/Output | Reserved pins |
| 11 | NC | Input/Output | Reserved pins |
| 12 | NC | Input/Output | Reserved pins |
| 13 | GND | - | Power Ground |
| 14 | VCC | input | Power input: 3.0~3.6V |
| 15 | TXD | Output | TTL serial port output, connected to external RXD input pin; |
| 16 | RXD | input | TTL serial port input, connected to external TXD output pin; |
| 17 | NC | - | Reserved pins |
| 18 | NC | - | Reserved pins |
| 19 | TO | Output | Used to indicate the working status of LoRa; the user wakes up the external MCU, and outputs a low level during the power-on self-test initialization period; (can be left floating) |
| 20 | NC | - | Reserved pins |
| 21 | RST | input | Reset pin, low level reset |
| 22 | GND | - | Power Ground |
| 23 | NC | - | Reserved pins |
| 24 | GND | - | Power Ground |