Characters being deleted when changing backlight?

[Faeranne]

Getting a weird bug whenever I try to change the backlight over I2C. Any time I do so, the screen will delete a character, usually the last one from the current message, though repeating the change will delete more and more characters. Any idea why this is happening?

[nseidle]

Thanks for reporting. Do you have example code that demonstrates the issue so we can reproduce?

[Faeranne]

import qwiic_serlcd
lcd = qwiic_serlcd.QwiicSerlcd()
lcd.begin()
lcd.setContrast(5)
lcd.clearScreen()
lcd.print("Hello World")
lcd.setBacklight(0,0,0)
#'d' should now disappear from 'World'
lcd.setBacklight(100,100,255)
#'l' should now disappear from 'World'

Tested on python3 with Qwiic_SerLCD_Py installed.

[nseidle]

Ah, this repo is the firmware that runs on the LCD. I suspect it's python library related. I've moved your issue to that repo.

[Faeranne]

I've had the same issue with an arduino setup as well... Originally thought it was the arduino library, so I tested it with the above python.

[nseidle]

Ok, feel free to post an example problem sketch on the Arduino library. If we pin it down to firmware on the LCD, then... well, I'll move some issues again :)