Ebyte high quality UART wireless modules for meter reading smart home smart agriculture industrial control
[IC]：SX1278
[Frequency]：410~525MHz
[Power]：10~20dBm
[Distance]：3.0km
[Interface]：UART
[Weight]：2.1±0.1g
[Introduction]：E32-400T20S is a wireless serial port module developed by EBYTE for the wireless meter reading industry. LoRa spread spectrum solution, with air wake up function (low power consumption), factory default 470MHz meter reading frequency band, long subcontracting mode (197 bytes per package), can meet the application of the meter reading industry.
| Pin No. | Pin Item | Pin Direction | Pin Application |
|---|---|---|---|
| 1 | GND | - | Ground |
| 2 | GND | - | Ground |
| 3 | GND | - | Ground |
| 4 | GND | - | Ground |
| 5 | M0 | Input(weak pull-up) | Work with M1 & decide the four operating modes;Floating is not allowed, can be ground. |
| 6 | M1 | Input(weak pull-up) | Work with M0 & decide the four operating modes;Floating is not allowed, can be ground. |
| 7 | RXD | Input | TTL UART inputs, connects to external TXD output pin;Can be configured as open-drain or pull-up input. |
| 8 | TXD | Output | TTL UART outputs, connects to external RXD input pin Can be configured as open-drain or push-pull output. |
| 9 | AUX | Output | To wake up the external MCU, during the procedure of self-check initialization, the pin outputs low level; Can be configured as open-drain output or push-pull output; Floating is allowed. |
| 10 | VCC | - | Voltage positive reference of module; Power supply 2.6V ~ 5.2V DC |
| 11 | GND | - | Ground |
| 12 | NC | - | - |
| 13 | GND | - | Ground |
| 14 | NC | - | - |
| 15 | NC | - | - |
| 16 | NC | - | - |
| 17 | NC | - | - |
| 18 | NC | - | - |
| 19 | GND | - | Ground |
| 20 | GND | - | Ground |
| 21 | ANT | - | Antenna |
| 22 | GND | - | Ground |