NS1 Serial to Ethernet Module
[Protocol]：IPv4、TCP/UDP、HTTP、MQTT
[Interface]：TTL(3.3V)、Ethernet port (RJ45)
[Size]：17 x 19 x 4mm（length x width x height）
[Weight]：1.6g ± 1g
[Introduction]：NS1 is a serial server that realizes serial data ⇌ Ethernet data conversion;It has a variety of Modbus gateway modes and MQTT/HTTP IoT gateway modes, which can meet the networking functions of various serial devices.
| No. | Pins | Function | Instruction |
|---|---|---|---|
| 1 | GND | GND | Common ground terminal, power supply negative terminal input; |
| 2 | PA14 | RX_LED | The serial port receives the indicator light output, the default output is high level, when there is data input, it outputs low level, and when there is continuous data, it outputs a square wave signal with a period of 80ms and a low level of 20ms; |
| 3 | PA13 | NC | Default dangling; |
| 4 | PA12 | NC | Default dangling; |
| 5 | RXD1 | NC | Default dangling; |
| 6 | TXD1 | NC | Default dangling; |
| 7 | PB9 | LINKLED | After the network cable is inserted, it outputs a low level, and the network cable is not connected to output a high level; |
| 8 | PB8 | SPDLED | SPD indicator; |
| 9 | TCK | NC | Default dangling; |
| 10 | TIO | NC | Default dangling; |
| 11 | 3.3V | 3.3V output | Can output 3.3V, please do not connect large load |
| 12 | GND | GND | Common ground terminal, power supply negative terminal input; |
| 13 | RX_P | RX_P | Ethernet receives RX+ signal; |
| 14 | RX_N | RX_N | Ethernet receives RX-signal; |
| 15 | TX_P | TX_P | Ethernet sends TX+ signal; |
| 16 | TX_N | TX_N | Ethernet sends TX-signal; |
| 17 | D+ | NC | Default dangling; |
| 18 | D- | NC | Default dangling; |
| 19 | TXD0 | TXD0 | The serial port sends data, the TTL level communication voltage only supports 3.3V, if it is connected to 5V, it needs level conversion; |
| 20 | PB6 | RTS | MODEM output signal of serial data, request to send; |
| 21 | PB5 | NC | Default dangling; |
| 22 | RXD0 | RXD0 | The serial port receives data, the TTL level communication voltage only supports 3.3V, if it is connected to 5V, it needs level conversion; |
| 23 | PB3 | 485_EN | RS485 software enable control pin, when the serial port sends data, it is high-level output, and the default is low-level output; |
| 24 | PB2 | NC | Default dangling; |
| 25 | PB1 | NC | Default dangling; |
| 26 | PB0 | CTS | MODEM input signal of serial data, clear to send; |
| 27 | RST | nRST | External reset input, active low; |
| 28 | PB22 | NC | Default dangling; |
| 29 | PB21 | LED2 | The network port link indicator output, the default output high level, the output low level after the connection is successful under the TCP protocol, and the default output low level under the UDP protocol; |
| 30 | PB20 | LED1 | Running indicator, after the module is powered on and initialized, this pin outputs a 5Hz square wave; |
| 31 | ANT | NC | Default dangling; |
| 32 | PA4 | IO_RST | To restore the factory pins, an external reset button is required, and the low level is valid for about 5s; |
| 33 | PA5 | NC | Default dangling; |
| 34 | PA15 | TX_LED | The serial port sends indicator light output, the default output is high level, when there is data output, it outputs low level, and when there is continuous data, it outputs a square wave signal with a period of 80ms and a low level of 20ms; |
| 35 | GND | GND | Common ground terminal, power supply negative terminal input; |
| 36 | VCC | VCC | Positive power input, support 3-5.5V input; |