- Make sure the power supply voltage must be 4.5-5.5V. If the power supply exceeds or falls below this range, the machine cannot work normally. If the power supply voltage is too high, the module screen will be damaged.
- Determine whether the serial port level is RS232 or TTL or RS485, and choose according to the requirements in conjunction with the fourth point.
- Pay attention to the interface definition instructions of the power interface socket, and do not connect it wrongly.
| 1PIN | 2PIN |3PIN | 4PIN | 5PIN | 6PIN | 7PIN | 8PIN | | --- | --- | --- | --- |--- | --- |--- | --- | | DC5V | RESET | CTS | TXOUT/B | RXIN/A | RTS | GND | GND |
|DC power input 4.5-5.5V |Module RESET, the default is NC |Flow control CTS |Serial TX or RS485-B. (Connect to external equipment RX/RS485B) |Serial RX or RS485-A (connect to external equipment TX/RS485A) | Flow control RTS| Power ground | Power ground |
| 1/2/3PIN | 4PIN | 5PIN | 6PIN | 7PIN | 8/9/10PIN | | --- | --- | --- | --- |--- | --- | | DC5V | RTS | RXIN/A | TXOUT/B | CTS | GND | |DC power input 4.5-5.5V | Flow control RTS | Serial port RX or RS485-A (connect to external device TX/RS485A) | Serial port TX or RS485-B. (Connect to external equipment RX/RS485B) | Flow control CTS | Power ground |
0R resistance is TTL, 0R is not RS232.
The power cord is a white-blue or white-red cord with a single-ended PH2.0-8PIN 10CM buckle. As shown