SMS1222 LCD display module is a kind of LCD display module that can display 12 digits and 7-segment prompts and 10 decimal points, produced by Changsha Sunman Electronic Co., Ltd. It is widely used in intelligent gas, water meters, electric meters, heat meters and other fields.
The SMS1222 is a 12‑digit numeric LCD module with 7‑segment indicators and up to 15 decimal points, designed for use with micro‑controller serial interfaces in smart meters and similar applications. It operates from 3.0 V to 6.5 V and features low static power consumption.
This manual describes the module’s technical parameters, three‑wire serial interface signals, physical dimensions, address mapping table, and provides a reference web link for further information. This manual is written in Chinese.
| Display capacity | 12 digits + 7 segment indicators + 15 decimal points |
|---|---|
| Operating voltage | 3.0 V ~ 6.5 V |
| Static power consumption | ≤15 µA at 5.0 V |
| Character height | 10 mm |
| Operating temperature range | -16 °C ~ +50 °C |
| Storage temperature range | -26 °C ~ +60 °C |
| Display mode | Reflective positive display |
| Interface type | Three‑wire serial interface (8‑bit) |
| Package dimensions | ≈67.0 mm × 48 mm × 57.0 mm |
The module works from 3.0 V up to 6.5 V.
It can show 12 numeric digits, 7 segment indicators, and up to 15 decimal points.
It uses a three‑wire serial interface (8‑bit) compatible with micro‑controller UART.
The module can operate between –16 °C and +50 °C.