OK, bad news. Fresh install of everything. This time, no dirty mark, and same result! It’s ok that maybe this LCD may end not working in this board, but why doest it keep throwing that exception related to the reserved pin?
klippy.log (33.8 KB)
More info. I tried to change the pin name, instead using RST i used PA8 which is related to Neopixel pin, just to try. This time, this error dissapeared but klipper never started again. Again, remove all display configuration, and Klipper state was ready
Sorry, forget my reply about deleting the pin!
Here https://www.reddit.com/r/klippers/comments/rx2wrn/comment/hw7fxwa/ is the “kill_pin” not commented out. The guy who asks, had his “kill_pin” commented out like you.
your config from yesterday
[display]
lcd_type: hd44780
rs_pin: EXP1_4
e_pin: EXP1_3
d4_pin: EXP1_5
d5_pin: EXP1_6
d6_pin: EXP1_7
d7_pin: EXP1_8
encoder_pins: ^EXP2_3, ^EXP2_5
click_pin: ^!EXP1_2
#kill_pin: ^!EXP2_8
[output_pin beeper]
pin: EXP1_1
Good luck.
Thanks! The kill pin is commented because mini e3 v2 doesn’t have such function. The header in the board has 10 pins, rs_pin, e_pin, d4, d5, d6, d7, click_pin, and beeper, add +5v and ground pins. Of course i won’t get full functionality, i’d like just to be able to see the printer status.
The mini skr e3 v2 can not control the EXP1 pin 4 - that particular board has hardwired that pin to the micro-controller reset. So, you can not directly wire an hd44780 display to the skr e3 v2. The error message reported by Klipper is correct - it is letting you know that the configuration you requested is not valid.
It may be possible to build a “wire harness” to route the hd44780 pins to available pins on the skr e3. I’m not sure.
-Kevin
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Hi, thanks for your help! I think you are right but I also would like to know if it’s possible, as you say, build a “wire harness”. The only doubt would be if any other pin could work as the RST pin that the lcd needs!