ATmega328P (Arduino Uno core) or PIC16F877A (depending on your firmware preference).
The is a 16-character by 2-line LCD module commonly simulated in Proteus to visualize character data while saving microcontroller I/O pins. In a physical setup, this typically combines a standard JHD162A (or similar) LCD with a PCF8574 I2C backpack. 1. Proteus Library Setup To use this component in Proteus:
: I2C lines require pull-up resistors (typically 4.7k or 10k ohms) connected to VCC to function correctly in the simulation. 3. Finding the I2C Address jhd-2x16-i2c proteus
Missing pull-up resistors on the I2C bus lines. Proteus reads floating pins as undefined states ( N浮 ), preventing the master from issuing a start condition. Fix: Ensure both SDA and SCL have digital resistors pulled up to a +5V VCC terminal. "I2C Slave Not Acknowledging" Warnings in the Log
Right-click the JHD-2x16-I2C in Proteus and edit its properties. Look for I2C Address . Set it to 0x27 (most common). If your code uses 0x3F , change it here. ATmega328P (Arduino Uno core) or PIC16F877A (depending on
[Start] Write to Address 0x4E (0x27 << 1) [Data] 0x00 (Control byte: Backlight ON) [Data] 0x80 (Set DDRAM address) [Data] 'P','r','o','t','e','u','s' [Stop]
Are you planning to add to the same bus line? Finding the I2C Address Missing pull-up resistors on
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