Hey everyone, I wanted to share my recent project where I integrated ESPHome to control the brightness of an LCD display using a simple analog write function. This was a fun challenge, and I thought it might be helpful for others who are also exploring ESPHome for custom setups.
I’ve been working on converting some of my C-based projects into ESPHome configurations. One of the things I wanted to achieve was controlling the brightness of an LCD display via a GPIO pin. In my original C code, I used analogWrite to set the brightness, but I wanted to replicate this functionality within ESPHome without relying on Home Assistant for control.
Here’s a quick overview of what I did:
- ESPHome Configuration: I set up an output using the
ledcplatform, which allows for PWM (Pulse Width Modulation) control on GPIO pins. This is perfect for adjusting brightness smoothly. - LCD Integration: I connected the LCD display using standard GPIO pins and configured it within ESPHome. The brightness control is handled by the
my_pwm_outputID, which is tied to GPIO13. - Brightness Setting: Instead of controlling the brightness through Home Assistant, I wanted to set it directly in the configuration. After some research and trial and error, I found that specifying the brightness value within the
lightplatform configuration achieves this.
The final setup works seamlessly, and I can adjust the brightness by simply modifying the value in the YAML file. This approach keeps everything local to the ESP32 without needing constant interaction from Home Assistant.
If anyone has tips on optimizing this further or suggestions for alternative methods, I’d love to hear them! It’s always great to learn new techniques for ESPHome configurations.
Thanks for reading, and happy coding!
Best regards,
[Your Name]