Croduino Nova 2 GPIO2 pull-up resistor affects input readings

Customer:

I have some questions about the Croduino Nova 2 I purchased a few weeks ago:

  1. The labels on the board for inputs and outputs do not match the labels on the included leaflet. Which ones are correct?

  2. Are there any difficulties programming from Windows 10?

  3. I tried using your code called “tipkalo” (button) as an activator on the Nova 2 board. When I define GPIO2 as “led” and GPIO12 as “tipkalo” everything works as described. However, when I swap them and define GPIO12 as “led” and GPIO2 as “tipkalo”, with the appropriate rewiring on the breadboard, it does not work. I tried combinations with GPIO12 and GPIO14. Both combinations work as led and as tipkalo. Are there any limitations with defining which are inputs and which are outputs?

Original message (Croatian)

Molim Vas par objašnjenja vezano uz Nova 2 koju sam kupio prije
par tjedana:

  1. Oznake na pločici za ulaze i izlaze ne odgovaraju oznakama na
    priloženom letku. Koje su prave?
  2. Postoje li koje poteškoće za programiranje iz Windovs 10
    programa?
  3. Pokušao sam koristiti na Nova 2 pločici Vaš kod pod nazivom
    tipkalo kao aktivator. Kada GPIO2 definiram kao “led”, a GPIO 12
    kao “tipkalo” sve radi kako je opisano. Ukoliko zamjenim te
    definiram GPIO12 kalo “led”, a GPIO2 kao “tipkalo”, naravno uz
    odgovarajuće prespajanje na probnoj pločici to ne radi. Pokušao
    sam kombinacije sa GPIO 12 i 14. Radi u obje kombinacije kao led i
    kao tipkolo. Postoje li kakva ograničenja sa definiranjem koji su
    ulazi, a koji su izlazi?

Originally submitted via email support on 3 April 2020. Migrated to the forum for community visibility.

Soldered Support:

  1. What are the differences between the leaflet and the board? You may be thinking of GPIO4 and GPIO5 differences - there should not be any others. The board labels are correct.

  2. No, it works from every OS, including Windows 10. If you have an issue, you can ask on our forum: forum.e-radionica.com

  3. GPIO2 has a pull-up resistor that interferes with your readings: Croduino-NOVA2-Eagle-Files/v1.0/Croduino Nova v2.0 Schematics.pdf at master · SolderedElectronics/Croduino-NOVA2-Eagle-Files · GitHub
    It is necessary for the ESP8266 controller to function.

Original message (Croatian)

hvala Vam na upitu.

  1. Koje su razlike između letka i pločice? Možda mislite na GPIO4 i GPIO5 razlike, ostalih ne bi trebalo biti? Točno je na pločici.

  2. Nema, radi iz svakog OS, uklj i Win 10. Ako imate problem, možete postaviti pitanje na našem forumu: forum.e-radionica.com

  3. GPIO2 ima pull-up otpornik koju Vam ometa očitanja: Croduino-NOVA2-Eagle-Files/v1.0/Croduino Nova v2.0 Schematics.pdf at master · SolderedElectronics/Croduino-NOVA2-Eagle-Files · GitHub
    Potreban je kako bi kontroler ESP8266 funkcionirao.