Customer:
I’ve soldered the I2C controller onto a 1602A display and I’m having communication issues. When I connect it, the entire top row is filled with squares and doesn’t respond to commands (see attached image). The brightness potentiometer works correctly. Any ideas what the problem might be?
I also tried connecting the display without the controller and got the same result.
Original message (Croatian)
Nalemio sam i2c kontroler na 1602a display i imam problema s komunikacijom sa displeyem. Kad ga spojim, cijeli gornji red je ispunjen kockama i ne reagira na naredbe (slika u prilogu). Potenciometar za brightness radi ispravno. Imate li ideju u cemu je problem?
Progao sam display spojiti i bez kontrolera i ista je stvar.
Originally submitted via email support on 3 December 2017. Migrated to the forum for community visibility.
Soldered Support:
Which code are you using?
Original message (Croatian)
molim te da nam pošalješ slike manju od 1MB, nismo je u mogućnosti pregledati u ovom formatu.
Koji kod koristiš?
Customer:
I’ve attached a smaller image.
I’m using the example from your library “HelloWorld_IIC” without any modifications.
I also tried isolating just the part that turns the backlight on/off or prints text, but no command responds.
Original message (Croatian)
manja slika je u prilogu.
Koristim primjer iz vašeg libraraya “HelloWorld_IIC” bez ikakvih izmjena.
Probao sam i izdvojiti samo dio koji pali/gasi backlight ili ispisuje tekst, ali nijedna komanda ne reagira.
Attachment omitted in migration: IMG_20171203_144007 (1).jpg
Soldered Support:
Have you looked at this tutorial: https://e-radionica.com/hr/blog/2016/07/14/1064/
The contrast does seem too high to me. Try adjusting the potentiometer on the I2C module.
Original message (Croatian)
jesi li pogledao ovaj tutorial: https://e-radionica.com/hr/blog/2016/07/14/1064/
Svakako mi se čini kako je kontrast prevelik, probaj se igrati s potenciometrom na I2C modulu.
Customer:
Thanks for the help - I found the issue. It was a problem with the I2C address. Everything works correctly now!
Original message (Croatian)
Davide,
hvala na pomoći, debug je uspio, bio je problem u IIC adresi. Sada sve radi ispravno!