| Simulator | Supports I2C LCD? | Free Tier | Difficulty | | :--- | :--- | :--- | :--- | | | Yes (JHD162A with I2C) | 100% Free (Browser) | Easy | | Tinkercad | No native I2C LCD, but custom | Free | Medium | | SimulIDE | Yes (with PCF8574) | Free (Open Source) | Medium | | Falstad | No | Free | Hard (Need mod) | | Qucs-S | No | Free | Hard |
Note: For Proteus simulation, compile this in Arduino IDE (free) and copy the HEX file path into the Arduino component in Proteus. If you cannot get the free Proteus version to work (due to library limits), here are completely free simulators that support I2C LCD: jhd2x16i2c proteus free
This is exactly how the popular LiquidCrystal_I2C library works. Simulating this in Proteus allows you to see the waveform on the I2C Debugger. Yes, absolutely. While there is no single file named JHD2x16I2C.pdflib that works flawlessly in the free version of Proteus, the combination of the PCF8574 + LM016L acts as a perfect functional equivalent. | Simulator | Supports I2C LCD
void loop() // Nothing here for static text Simulating this in Proteus allows you to see
By using the or open-source simulators like SimulIDE , you can simulate I2C LCD communication without spending a cent.
#include <Wire.h> #include <LiquidCrystal_I2C.h> // Set the I2C address (usually 0x27 or 0x3F) // For PCF8574 default address in Proteus is often 0x20 or 0x27 LiquidCrystal_I2C lcd(0x27, 16, 2);