EWM181-Z04SX ZigBee3.0 to serial port wireless module small size 2.4GHz frequency band
[Communication interface]：UART
[Operating frequency]：2.4GHz
[Transmitting power]：4.5dBm
[Communication distance]：240m
[Packaging method]： SMD
[Product size]：14*20mmm
[Product weight]：1.1±0.1g
[Introduction]：EWM181-Z04SX is a small-sized, 2.4GHz frequency band, IPEX antenna interface ZigBee3.0 to serial port wireless module designed and produced by Ebyte. It is a SMD package with a maximum transmit power of 4.5dBm and a pin spacing of 1.27mm. It comes with self-organizing network firmware and is easy to use. It is mainly suitable for data transmission application scenarios.
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| Pin number | Pin name | Pin direction | Pin usage |
| 1 | GND | input/output | Ground wire, connected to the power reference ground |
| 2 | WKP | enter | Module sleep wake-up pin, low level wake-up, default pull-up |
| 3 | NWK_KEY | enter | One-click networking pin, 10ms~1000ms low level distribution network, 5s low level reset network, default pull-up |
| 4 | P2.2 | input/output | Reserved, users do not need to pay attention |
| 5 | P2.1 | input/output | Reserved, users do not need to pay attention |
| 6 | P1.7 | input/output | Reserved, users do not need to pay attention |
| 7 | P1.6 | input/output | Reserved, users do not need to pay attention |
| 8 | P1.5 | input/output | Reserved, users do not need to pay attention |
| 9 | P1.4 | input/output | Reserved, users do not need to pay attention |
| 10 | GND | input/output | Ground wire, connected to the power reference ground |
| 11 | VCC | enter | Power supply, 2.0 ~ 3.6V DC power supply |
| 12 | TXD | output | Serial data output |
| 13 | RXD | enter | Serial data input |
| 14 | M1 | enter | Select port 1 for the node type, which needs to be used in conjunction with the M0 port. |
| 15 | M0 | enter | Select port 0 for the node type, which needs to be used in conjunction with the M1 port. |
| 16 | LINK | output | Network status indicator light, high level network is effective, default low level |
| 17 | P2.0 | input/output | Reserved, users do not need to pay attention |
| 18 | RST | enter | reset pin |