[Communication interface]：RS485
[Working voltage]：DC 5~24V
[Positioning system]：BDS/GPS/GLONASS
[Communication protocol]：Modbus RTU
[Product size]：103*28*28.5mm
[Introduction]：EWD108-GN03(485) multi-mode GNSS positioning module is a positioning terminal that supports multiple positioning systems (BDS/GPS/GLONASS positioning system). The shell adopts three-proof coating, which is Anti-Fungal, Anti-Humidity, and Anti-Salt Spray.The device outputs positioning information through the Modbus RTU protocol, supports outputting RMC-ASCII strings that comply with the NMEA0183 protocol and storing them in separate registers. The serial port baud rate can reach up to 115200bps, and can be easily modified through the Modbus RTU protocol, which is convenient and fast.
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| Serial number | Identification name | Function description |
| 1 | PWR indicator light | Power indicator light, power on |
| 2 | PPS second pulse indicator | It is often extinguished when the positioning is ineffective; After the positioning is valid, it flashes once per second |
| 3 | TXD indicator light | Send indicator light, flashing when sending data to RS485 bus |
| 4 | RXD indicator light | Receive indicator light, flashing when receiving data from RS485 bus |
| 5 | Factory buttons | Long
pressing and pressing for 5-10s is valid, and the device address and
baud rate parameters are restored to factory parameters; Factory parameters: The device address is 1, serial port parameters 9600/8/No verification/1 |
| 6 | RS-485 Interface A | RS485 bus A interface |
| 7 | RS-485 Interface B | RS485 bus B interface |
| 8 | Negative power supply | Power ground |
| 9 | Power supply positive pole | Power supply positive electrode interface, 5~24V DC female seat |
| 10 | ANT | SMA antenna interface, GPS active antenna is required |