Customer:
I connected a DHT11 temperature and humidity sensor to my Croduino Nova board following the instructions on the website (pin1 +5V; pin2 A0; pin3 -; pin4 gnd) but the sensor doesn’t read values and just displays zero.
I also cannot connect the MQ-7 carbon monoxide sensor to the board - it gives an error (I connected pin1(A0) to A0; pin2(D0) to -; pin3(gnd) to gnd; pin4(Vcc) to +5V). I need help with this.
Original message (Croatian)
naručila sam s Vaše stranice Croduino Nova pločicu, i nekoliko senzora, i imam problema prilikom spajanja. Senzor za temperaturu i vlagu DHT11 spojila sam prema uputama na stranici (pin1 +5V; pin2 A0; pin3 - ; pin4 gnd) no senzor ne očitava vrijednosti (ispisuje nulu). Imate li ideju u čemu bi mogao biti problem?
Zatim senzor MQ-7 (uglj.monoksid) ne uspijevam niti spojiti na pločicu, javlja mi grešku (spojila sam pin1(A0) A0; pin2(D0) -; pin3(gnd) gnd; pin4(Vcc) +5V). Molim Vas pomoć!
Originally submitted via email support on 13 June 2017. Migrated to the forum for community visibility.
Customer:
I found the problem - the cable that came with the Croduino board was faulty. After changing the cable, both sensors work.
Original message (Croatian)
otkrila sam u čemu je bio problem-kabel koji sam dobila uz Croduino pločicu nije bio ok, promjenom kabela oba senzora rade.
Customer:
I need help with connecting the HMC5883L compass module to the Croduino Nova. I connected it according to the instructions (Soldered: Open-Source Electronics, Boards, Sensors & Modules – Soldered Electronics): Vcc to 5V; gnd to gnd; SCL to D5 (pin 4 on the board); SDA to D4 (pin 3 on the board). I believe I connected them correctly, but the kompas.begin() command fails and execution stays in the loop:
while (!kompas.begin())
{
Serial.println("Ne mogu pronaci ispravni HMC5883L, provjeri spajanje!");
delay(500);
}
It keeps printing that message constantly. The wires, cable and breadboard work with other sensors so that shouldn’t be the issue. Do you have any ideas what I can try?
Original message (Croatian)
nema problema za kablel, ne trebate slati zamjenski (ne možete me pronaći jer je naručeno preko faksa). No molim Vas ako mi možete pomoći vezano za spajanje kompas modula HCM2553L na Croduino Novu. Spojila sam ga prema uputama: (Soldered: Open-Source Electronics, Boards, Sensors & Modules – Soldered Electronics)
Vcc - 5V; gnd - gnd; SCL - D5 (4.pin na pločici); SDA - D4 (3.pin na pločici). Nadam se da sam ih dobro spojila? Međutim ne prolazi naredba kompas.begin(), tako da ostaje u petlji
while (!kompas.begin())
{
Serial.println(“Ne mogu pronaci ispravni HMC5883L, provjeri spajanje!”);
delay(500);
}
I konstanstno se ispisuje gore navedena poruka. Žice, kabel i breadboard funkcioniraju s ostalim senzorima tako da to ne bi trebao biti problem. Imate li ideju što mogu napraviti?
Soldered Support:
Change Wire.begin(); to Wire.begin(4,5);
You can first verify everything is working correctly using this tutorial: https://e-radionica.com/hr/blog/2016/07/14/1064/#I2C%20adresa
Also make sure to change to Wire.begin(4,5);
The reason is that the I2C pins for the microcontroller on the Croduino Nova are not hardcoded in the Arduino IDE.
Original message (Croatian)
promijenite samo Wire.begin(); u Wire.begin(4,5);
Prije toga možete provjeriti je li ispravno sve pomoću ovog tutoriala: https://e-radionica.com/hr/blog/2016/07/14/1064/#I2C%20adresa
Također prepravite na Wire.begin(4,5);
Razlog je što I2C pinovi za mikrokontroler koji se nalazi na Croduino Nova nisu Hardcorani u Arduino IDE.