EWM181-Z12SP(R) Router ZigBee 3.0 Wireless Module Network Self-healing Equipped with onboard PCB antenna Simple and easy to develop
[Communication Interface]：UART
[Operating Frequency]：2.4GHz
[Transmit Power]：4.5dBm
[Communication Distance]：0.3km
[Size]：14 x 20mm
[Product weight]：1.0 ± 0.1g
[Introduction]：The EWM181-Z12SP series is a compact, 2.4GHz ZigBee 3.0-to-serial wireless module designed and manufactured by Ebyte. This SMD-type module features a maximum transmit power of 12dBm and a 1.27mm pin pitch. It comes with pre-installed ad hoc networking firmware for ease of use. This ZigBee 3.0 wireless module is primarily suitable for data transmission applications.
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| Pin number | Pin Name | Pin direction | Pin Purpose |
| 1 | GND | Input/Output | Ground wire, connected to the power reference ground |
| 2 | WKP | input | Module sleep wake-up pin, low level wake-up, default pull-up |
| 3 | NWK_KEY | input | One-key networking pin, 10ms~1000ms low level to configure the network, 5s low level to reset the network, default pull-up |
| 4 | PD4 | Input/Output | Reserved, users do not need to pay attention |
| 5 | PA7 | Input/Output | Reserved, users do not need to pay attention |
| 6 | PD2 | Input/Output | Reserved, users do not need to pay attention |
| 7 | PD7 | Input/Output | Reserved, users do not need to pay attention |
| 8 | PB7 | Input/Output | Reserved, users do not need to pay attention |
| 9 | PB6 | Input/Output | Reserved, users do not need to pay attention |
| 10 | GND | Input/Output | Ground wire, connected to the power reference ground |
| 11 | VCC | input | Power supply, 2.0 ~ 3.6V DC power supply |
| 12 | TXD | Output | Serial port data output |
| 13 | RXD | input | Serial port data input |
| 14 | PC1 | Input/Output | Reserved, users do not need to pay attention |
| 15 | PC4 | Input/Output | Reserved, users do not need to pay attention |
| 16 | LINK | Output | Network status indicator, high level network is valid, default low level |
| 17 | PC0 | Input/Output | Reserved, users do not need to pay attention |
| 18 | RST | input | Reset pin |