The SM34-8ch-470MHz wireless serial communication module manual provides features, specifications, wiring, configuration and operation instructions.
The SM34-8ch-470MHz is a wireless serial communication module that operates in the 465‑470 MHz ISM band with up to +30 dBm (1000 mW) transmit power, eight selectable channels and support for TTL/UART, RS‑232 and RS‑485 interfaces. It offers low power consumption, sleep mode below 5 µA, and a built‑in watchdog for reliable operation.
This manual details the module’s features, technical specifications, port definitions, antenna connection, channel and interface settings, as well as network topology and programming considerations. It also includes wiring diagrams, configuration jumpers, and a list of factory‑supplied accessories. This manual is written in Chinese.
| Modulation | FSK |
|---|---|
| Working frequency | 465–470 MHz |
| Transmit power | +30 dBm (1000 mW) |
| Receive sensitivity | -118 dBm |
| Number of channels | 8 |
| Transmit current | ≤495 mA |
| Receive current | ≤27 mA |
| Standby (sleep) current | ≤5 µA |
| Interface speed | 1200/2400/4800/9600/19200 bps |
| Interface type | TTL/UART/RS‑232/RS‑485 |
| Supply voltage | +3 V to +5.5 V DC |
| Operating temperature | -20 °C to 85 °C |
| Storage temperature | -65 °C to 150 °C |
| Operating humidity | 10 %–90 % RH (no condensation) |
| Dimensions | 47 mm × 30 mm × 7 mm |
The module provides a transmit power of +30 dBm (1000 mW).
It supports eight selectable channels.
The standby current is less than 5 µA.