Technical datasheet for the SM32-8ch-470MHz wireless serial communication module by Shanghai Shangzhi.
The SM32-8ch-470MHz is an 8‑channel wireless serial communication module operating in the 465‑470 MHz ISM band. It offers multiple UART, RS‑232 and RS‑485 interfaces, low power consumption and built‑in error‑correction for reliable data transfer.
The module is supplied with a 9‑pin connector, configurable jumpers for channel and interface selection, and supports power supplies from +3 V to +5.5 V. Detailed specifications, pin definitions, and recommended antenna connections are provided for integration into industrial automation, data acquisition, and remote monitoring applications. This manual is written in Chinese.
| Modulation Method | FSK |
|---|---|
| Working Frequency | 465–470 MHz |
| Transmit Power | +23 dBm (200 mW) |
| Receive Sensitivity | -118 dBm |
| Number of Channels | 8 channels |
| Transmit Current | ≤125 mA |
| Receive Current | ≤27 mA |
| Standby Current | ≤5 µA |
| Interface Speed | 1200/2400/4800/9600/19200 bit/s |
| Interface Types | TTL/UART, RS‑232, RS‑485 |
| Operating 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, non‑condensing |
| Dimensions | 47 mm × 26 mm × 7 mm |
The module transmits at +23 dBm, which is about 200 mW.
It supports eight separate channels.
The module operates from a +3 V to +5.5 V DC supply.
It provides TTL‑level UART, RS‑232 and RS‑485 interfaces.