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WSAL19537 – LCD1602 RGB Module/en

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Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The LCD1602 RGB Module is a 16x2 character LCD with an I2C interface and adjustable RGB backlight. It operates at 3.3 V or 5 V and uses the AiP31068L driver and PCA9633 RGB control chip.

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Technical overview

  • Display: 16 columns × 2 rows (character LCD).
  • Interface: I2C using only two signal wires (SDA/SCL); no extra hardware needed beyond the module's own I2C bus.
  • Operating voltage: 3.3 V or 5 V; operating current ~26 mA at 5 V and ~13 mA at 3.3 V.
  • Backlight: RGB, theoretically up to 16 M colors (256³) via the PCA9633 driver.
  • Dimensions: module 87.0 × 32.0 × 13.0 mm; display window 64.5 × 16.0 mm.
  • Pinout: VCC (3.3 V/5 V), GND, SDA, SCL.
  • Raspberry Pi: enable I2C via `sudo raspi-config`, then reboot with `sudo reboot`.
  • Wiring for Raspberry Pi: SDA → GPIO3 (BCM2835), SCL → GPIO5; VCC → 3.3 V, GND → GND.
  • Pico: SDA → GP4, SCL → GP5; VCC → 3.3 V, GND → GND.
  • Arduino: direct wiring of VCC, GND, SDA and SCL; install the library by unzipping into the Arduino IDE libraries folder or via “Include Library”.

Commands and examples – verify before use:  

sudo raspi-config
sudo reboot
cd ~ && wget https://files.waveshare.com/upload/5/5b/LCD1602-RGB-Module-demo.zip && unzip LCD1602-RGB-Module-demo.zip
cd ~/LCD1602-RGB-Module-demo/Raspberry && sudo chmod 777 * && sudo python Choose_Color.py
sudo python Discoloration.py
wget -P ~/pico https://files.waveshare.com/upload/5/5b/LCD1602-RGB-Module-demo.zip && cd ~/pico && unzip LCD1602-RGB-Module-demo.zip
cd ~/pico/LCD1602-RGB-Module-demo/Pico/c/build/ && cmake .. && make
sudo mount /dev/sda1 /mnt/pico && sudo cp LCD1602_RGB_Module_demo.uf2 /mnt/pico/ && sudo sync && sudo umount /mnt/pico && sleep 2

Notes and version constraints

  • Demo files are downloaded from an external URL; without network access in the sandbox they cannot be fetched.
  • Per the source, the LCD’s I2C address cannot be changed; therefore two identical modules cannot be driven simultaneously with different content.
  • If only the second line appears when running the Python demo, it may be a firmware incompatibility; use the provided firmware version.
  • The Pico demo requires the correct firmware (e.g., rp2-pico-20220117-v1.18); otherwise the display may misbehave.
  • Cable color may vary; connections should follow the pin definitions rather than cable color.
  • The PH2.0 4-pin connector part numbers are not given in the source; contact the supplier for ordering information.

Source and revision record

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