unknown error

[JohnDoe3005]

Hi,

I'm using a Wemos D1 mini with a R503 Fingerprint sensor. The wiring seems to be correct and mqtt is working too. I can learn new fingers but everytime i put my finger on the sensor i get this output

Found fingerprint sensor!
Connecting.......
Connected, IP address: 192.168.7.172
Attempting MQTT connection...connected
Image taken
Image converted
Unknown error
Communication error

It seems to happen in this part of the sketch

  // OK converted!
  p = finger.fingerFastSearch();
  if (p == FINGERPRINT_OK) {
    Serial.println("Found a print match!");
    lastID = finger.fingerID;
    lastConfidenceScore = finger.confidence;
    return p;
  } else if (p == FINGERPRINT_PACKETRECIEVEERR) {
    Serial.println("Communication error");
    return p;
  } else if (p == FINGERPRINT_NOTFOUND) {
    Serial.println("Did not find a match");
    return p;
  } else {
    Serial.println("Unknown error");
    return p;
  }

Any idea how to solve the problem? I tired it with 2 different R503 and two different Wemos D1 mini

My wiring is

Red + White > 3,3V Black > Ground Yellow > D6 Green > D5 Blue > not connected

[EverythingSmartHome]

Hello, with this sensor, can you try changing the line:

p = finger.fingerFastSearch();

To this:

p = finger.fingerSearch();

[JohnDoe3005]

working fine now ! Thanks for the super fast solution 👍