Template Count = 0 when templates exist

[jshep321]

• Arduino board: HUZZAH32
• Arduino IDE version 1.8.12
• List the steps to reproduce the problem below (if possible attach a sketch or
  copy the sketch code in too): LIST REPRO STEPS BELOW

Hi,
The output from reading sensor parameters works fine, but the Template Count is always 0.

11:47:51.015 -> Reading sensor parameters...
11:47:51.050 -> Status: 0x4
11:47:51.050 -> Sys ID: 0x0
11:47:51.050 -> Capacity: 200
11:47:51.050 -> Security level: 3
11:47:51.050 -> Device address: FFFFFFFF
11:47:51.050 -> Packet len: 128
11:47:51.050 -> Baud rate: 57600
11:47:51.050 -> Template count:0

[ladyada]

hi what is the exact sensor you are using?

[jshep321]

Ah sorry... R503 (Product ID 4651).

[ladyada]

ok it may not support that report. does it work otherwise

[jshep321]

yes, works quite well thanks!

From the hzgrow datasheet (ver 1.1) this appears to be supported... assuming I'm interpreting the "finger library size" correctly.

[caternuson]

It's not clear what example sketch was being run here. The only example that uses getTemplateCount() is the fingerprint example, but it should produce different output than what is shown above:

Adafruit-Fingerprint-Sensor-Library/examples/fingerprint/fingerprint.ino

Lines 65 to 74 in c127475

	finger.getTemplateCount();
	if (finger.templateCount == 0) {
	Serial.print("Sensor doesn't contain any fingerprint data. Please run the 'enroll' example.");
	}
	else {
	Serial.println("Waiting for valid finger...");
	Serial.print("Sensor contains "); Serial.print(finger.templateCount); Serial.println(" templates");
	}
	}

Running a modified version of the enroll sketch that adds these lines to the end of setup():

  finger.getTemplateCount();
  Serial.print(F("Template count: ")); Serial.println(finger.templateCount);

produces output with expected results:

Adafruit Fingerprint sensor enrollment
Found fingerprint sensor!
Reading sensor parameters
Status: 0x4
Sys ID: 0x0
Capacity: 200
Security level: 3
Device address: FFFFFFFF
Packet len: 128
Baud rate: 57600
Template count: 2
Ready to enroll a fingerprint!
Please type in the ID # (from 1 to 127) you want to save this finger as...

Please provide complete code listing for an example that demonstrates this issue.