AI04 LCD

Features

This leaf is equipped with a character LCD unit and two switches. The LCD unit is connected to the MCU leaf via I2C. The switch is connected to the digital input pin of the MCU and the P1 pin of the I2C Expander. To achieve low power consumption, the I2C Expander can be controlled to turn off the power supply with a load switch.

Specification

Dimension

Item Description
Dimension   W30.8×D30.5×H5.3mm

LCD

Item Description
Part number AQM0802A-RN-GBW
Display format 8x2 Character
Viewing area (WxH) 27x10.5mm
Dot size (WxH) 0.45x0.5mm
Dot pitch (WxH) 0.5x0.55mm
Character size (WxH) 2.45x4.35mm
Character pitch (WxH) 2.95x4.9mm
Viewing direction 6:00 O’Clock
Driving method 1/16Duty,1/5Bias
Controller IC ST7032I-0D(Sitronix) or compatible
Display mode STN (Gray)/Positive/Reflective
Interfaces I2C (Address: 0x3E)

I2C I/O Expander

Item Description
Part number PCA9557RGVR
Interface I2C (Address: 0x1A or 0x1E)

Block diagram

Pinassign

Tips

About the switch

Item Description
Switch1 Connected to pin 2
Switch2 Connected to I2C Expander P1 pin

Sample App

AVR MCU Examples

ESP32 MCU Examples

Library

Libraries are available for this leaf. Please install the necessary libraries from Environment to use them.

Document

Revision history

  • Rev A1.0: First edition, August 2019

Last modified 28.12.2020