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: https://github.com/adafruit/Adafruit-Fingerprint-Sensor-Library/blob/c1274756159b94fb8042900824ab6dd3738449a7/examples/fingerprint/fingerprint.ino#L65-L74

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.