[Interface type]:UART serial port
[Transmit power]:20dBm
[Communication distance]:2.0km
[Dimensions]:26*16mm
[Product weight]:2.1±0.1g
[Introduction]:EWM528-2G4NW20SX is a wireless serial port LoRa MESH networking module based on LoRa spread spectrum technology, with a maximum output power of +27dBm, a maximum air rate of 253Kbps, and a maximum supported baud rate of 2000000bps. The module operates in a frequency range of 2400-2500MHz (default 2400MHz). This wireless module uses the new LoRa MESH networking technology, with features such as decentralization, self-routing, network self-healing, and multi-level routing. It is suitable for smart homes and industrial sensors, wireless alarm security systems, building automation solutions, smart agriculture, and other application scenarios.
| Pin number | Pin Name | Pin Direction | Pin Purpose |
| 1 | PB4 | Input/Output | Not used yet, NC is recommended |
| 2 | PB7 | Input/Output | RF transmission indication pin, default high level, low level is effective (connected to test kit LED1) |
| 3 | NC | Input/Output | Not used yet, NC is recommended |
| 4 | NC | Input/Output | Not used yet, NC is recommended |
| 5 | NC | Input/Output | Not used yet, NC is recommended |
| 6 | NC | Input/Output | Not used yet, NC is recommended |
| 7 | PC1 | Input/Output | Not used yet, NC is recommended |
| 8 | NC | Input/Output | Not used yet, NC is recommended |
| 9 | PB6 | Input/Output | UART_TXD, serial port sending pin |
| 10 | PB5 | Input/Output | UART_RXD, serial port receiving pin |
| 11 | PC0 | Input/Output | Not used yet, NC is recommended |
| 12 | NC | Input/Output | Not used yet, NC is recommended |
| 13 | GND | Input/Output | Ground wire, connected to the power reference ground |
| 14 | ON | Input/Output | Antenna interface, 50Ω characteristic impedance (connected to the SMA interface of the test kit) |
| 15 | GND | Input/Output | Ground wire, connected to the power reference ground |
| 16 | NC | Input/Output | Not used yet, NC is recommended |
| 17 | RESET | enter | Reset pin, default high level, low level is effective (connected to the test kit RST button) |
| 18 | NC | Input/Output | Not used yet, NC is recommended |
| 19 | NC | Input/Output | Not used yet, NC is recommended |
| 20 | NC | Input/Output | Not used yet, NC is recommended |
| 21 | NC | Input/Output | Not used yet, NC is recommended |
| 22 | PD4 | Input/Output | EWM521-2G4NW20SX is not used yet, NC is recommended |
| 23 | PB3 | Input/Output | Not used yet, NC is recommended |
| 24 | PD6 | Input/Output | Not used yet, NC is recommended |
| 25 | PD7 | Input/Output | Not used yet, NC is recommended |
| 26 | PA7 | Input/Output | Not used yet, NC is recommended |
| 27 | GND | Input/Output | Ground wire, connected to the power reference ground |
| 28 | VDD | enter | Power supply VDD, power supply design according to different models |
| 29 | SWS | - | Debug pins |
| 30 | PB2 | - | Not used yet, NC is recommended |