I2C LCD Display Backlight

Using Arduino Displays
1

I've been using a Seeed Grove I2C RGB LCD display - the monochrome red/black model.

I've got it working OK with the recommended Grove_RGB_LCD_Backlight library using wire.h and rgb_lcd.h. I was hoping to be able to turn off the backlight to put the device into a lower power mode but I can't find a way to do it. I tried likely looking commands like noDisplay, setRGB and blink, but nothing seems to affect the backlight.

Is it possible, or have I picked the wrong display?

David

2

Did you read this?

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The datasheet says the backlight is hardwired directly to the power inputs. No software control in contrast to the PIC based 16x2 LCD controllers

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1 Like
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Thanks guys. I did read as much stuff as I could find but was misled by the fact that the RGB version does allow backlight manipulation. But as you say the data sheet is clear.

Thanks again, David

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