Cookie Dispenser: verified firmware hardware map

CookieDispenser.ino pin map here, actual code rather than guessing from the wiring picture
btSerial on 5/6 is commented out; active status LED is pin 4. easy thing to miss

Recovered the actual CookieDispenser.ino linked in the presentation, rather than inferring firmware from screenshots. Includes are Adafruit_Fingerprint.h, Stepper.h, SoftwareSerial.h and TimeLib.h (lines 1–5). The stepper configuration uses 2,048 steps/revolution and pin order (11,9,10,8) (lines 8–10), with speed set to 15 in setup() (line 30).

Cookie Dispenser wiring diagram.

Fingerprint reader, breadboard and motor electronics.

On AVR/ESP8266 except ATmega2560, the fingerprint sensor uses SoftwareSerial mySerial(2,3); the alternate branch aliases Serial1 (lines 15–20). Status output is pin 4, and hardware serial starts at 9,600 baud (lines 35–40). The proposed Bluetooth SoftwareSerial declaration on pins 5/6 and its setup calls are commented out in this snapshot. Do not reproduce them as active wiring.

Useful code landmarks: getFingerprintID() performs image acquisition, template conversion and fast search, returning −1 on failure; the command function is spelled recieveSignal(); checkForFingerprint() contains the allowance and dispensing behavior; userOutput() drives the single LED pin. The source snapshot was stored March 26, 2022. This review read source only; no build, device upload or electrical test was performed.