AI04 LCD
Features
Section titled “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
Section titled “Specification”Dimension
Section titled “Dimension”| Item | Description |
|---|---|
| Dimension | W30.8×D30.5×H5.3mm |
| 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
Section titled “I2C I/O Expander”| Item | Description |
|---|---|
| Part number | PCA9557RGVR |
| Interface | I2C (Address: 0x1A or 0x1E) |
Block diagram
Section titled “Block diagram”
Pinassign
Section titled “Pinassign”
About the switch
Section titled “About the switch”
| Item | Description |
|---|---|
| Switch1 | Connected to pin 2 |
| Switch2 | Connected to I2C Expander P1 pin |
Sample App
Section titled “Sample App”AVR MCU Examples
Section titled “AVR MCU Examples”ESP32 MCU Examples
Section titled “ESP32 MCU Examples”Library
Section titled “Library”Libraries are available for this leaf. Please install the necessary libraries from Environment to use them.
Document
Section titled “Document”Revision history
Section titled “Revision history”- Rev A1.0: First edition, August 2019