loo zhen feng

•

Eason Ong

•

Wei hong

•

Published February 16, 2025

Anti-theft system

System that allows jewellery stores to display their items after opening hours to increase product visibility without the worry of theft.

BeginnerFull instructions provided6 hours155

Things used in this project

Hardware components

M5Stack FIRE IoT Development Kit (PSRAM 2.0)

M5Stack Time-of-Flight (ToF) VL53L0X Laser Ranging Unit (MCP4725/)

SG90 Micro-servo motor

M5Stack RGB Unit with NeoPixel RGB LED (SK6812)

M5Stack PIR Sensor Human Body Infrared PIR Motion Sensor (AS312)

M5Stack I2C Hub 1 to 6 Expansion TCA9548A Module

M5Stack Mini HUB Unit 1 to 3 HUB

Software apps and online services

M5Stack Uiflow

Hand tools and fabrication machines

Hot glue gun (generic)

Scissors, Free Fall

Tape, Scotch

Story

While exploring solutions to sustainable technology solution in retail, we thought about how jewellery in jewellery stores are always kept after operating hours which affects the product visibility and potential buyers, reducing sales. This is due to concerns of theft or burglary after business hours as displayed jewellery is a prime target for thieves.

Our research showed that stalls with an item display gains more sales as compared to those without. To address this issue, we developed an anti-theft system that activates when motion is detected near the jewellery. When motion is detected:

Motor activates and turns 90 degrees, sliding the item into a cushioned compartment.
Light changes to red.
Alarm is sounded to deter theft.

This system benefits store owners as they can confidently leave jewellery on display, boosting sales while preventing thefts.

Objectives:

Increase sales and profits - Stalls with displays has more sales than those without.
Increase product visibility - Allow jewellery to be displayed after hours to attract potential buyers.
Reduce theft and burglary - Prevent theft-related losses with this anti-theft system.

Flowchart

M5 stack connection

Our Prototype

Our Code

from m5stack import *
from m5ui import *
from uiflow import *
import time
import unit

setScreenColor(0x222222)
pir_0 = unit.get(unit.PIR, unit.PORTB)
rfid_0 = unit.get(unit.RFID, unit.PAHUB2)
tof_1 = unit.get(unit.TOF, unit.PAHUB0)
pahub_2 = unit.get(unit.PAHUB, unit.PORTA)
rgb_2 = unit.get(unit.RGB, unit.PORTB)
servo_1 = unit.get(unit.SERVO, unit.PORTC)


shopstatus = None
distancefromjewel = None



label0 = M5TextBox(92, 120, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0)
label1 = M5TextBox(92, 96, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0)
label5 = M5TextBox(16, 6, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0)
label6 = M5TextBox(71, 197, "A", lcd.FONT_Default, 0xFFFFFF, rotate=0)
shop = M5TextBox(90, 60, "Shop status", lcd.FONT_DejaVu18, 0xFFFFFF, rotate=0)
label3 = M5TextBox(92, 141, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0)
label7 = M5TextBox(154, 197, "B", lcd.FONT_Default, 0xFFFFFF, rotate=0)
label4 = M5TextBox(249, 197, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0)
label8 = M5TextBox(250, -103, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0)
label2 = M5TextBox(16, 30, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0)
label9 = M5TextBox(136, 224, "(Open)", lcd.FONT_Default, 0xFFFFFF, rotate=0)
label10 = M5TextBox(51, 224, "(Close)", lcd.FONT_Default, 0xFFFFFF, rotate=0)




while True:
  label2.hide()
  label3.hide()
  label5.hide()
  label0.hide()
  label9.hide()
  label10.hide()
  label4.setText(str(tof_1.distance))
  speaker.setVolume(1)
  if rfid_0.isCardOn():
    speaker.tone(1800, 200)
    rgb.setColorAll(0x33ff33)
    wait_ms(1)
    if (rfid_0.readUid()) == '803f4fc3':
      label0.show()
      label0.setText('Access authorized')
      label3.show()
      label3.setText('Please wait')
      wait(1)
      rgb.setColorAll(0x000000)
      label9.show()
      label10.show()
      label3.setText('Open or Close Store')
      while not ((btnA.isPressed()) or (btnB.isPressed())):
        wait_ms(1)
      label0.hide()
      if btnA.isPressed():
        shop.setText('Shop Closed')
        shopstatus = 0
      elif btnB.isPressed():
        shop.setText('Shop Open')
        shopstatus = 1
      label3.hide()
      label10.hide()
      label9.hide()
      wait(2)
      if shopstatus == 0:
        while not ((btnA.isPressed()) and (rfid_0.readUid()) == '803f4fc3'):
          distancefromjewel = int((tof_1.distance))
          if distancefromjewel < 120 and (pir_0.state) == 1:
            servo_1.write_angle(90)
            wait(1)
            servo_1.write_angle(0)
            while not (rfid_0.readUid()) == '803f4fc3':
              label5.show()
              speaker.setVolume(10)
              distancefromjewel = int((tof_1.distance))
              rgb_2.setColor(1, 0xff0000)
              rgb_2.setColor(2, 0xff0000)
              rgb_2.setColor(3, 0xff0000)
              rgb.setColorAll(0xff0000)
              speaker.tone(1800, 200)
              label5.setText('Scan ID card to turn off')
              wait_ms(500)
            rgb.setColorAll(0x33ff33)
            speaker.tone(1000, 5000)
            label2.show()
            label5.show()
            label5.setText('Press A to disable shop security')
            label2.setText('Ignore to keep current settings')
            wait(2)
            rgb.setColorAll(0x000000)
          elif (pir_0.state) == 1:
            rgb_2.setColor(1, 0xffffcc)
            rgb_2.setColor(2, 0xffffcc)
            rgb_2.setColor(3, 0xffffcc)
          elif (pir_0.state) == 0:
            rgb_2.setColor(3, 0x000000)
            rgb_2.setColor(2, 0x000000)
            rgb_2.setColor(1, 0x000000)
          label2.hide()
          label5.hide()
        speaker.tone(1000, 5000)
        label5.show()
        label5.setText('Shop security disabled')
        rgb.setColorAll(0xff0000)
        wait(2)
        label5.hide()
      elif shopstatus == 1:
        while not ((btnB.isPressed()) and (rfid_0.readUid()) == '803f4fc3'):
          distancefromjewel = int((tof_1.distance))
          if distancefromjewel < 120 and (pir_0.state) == 1:
            servo_1.write_angle(90)
            wait(1)
            servo_1.write_angle(0)
            while not (rfid_0.readUid()) == '803f4fc3':
              label5.show()
              speaker.setVolume(10)
              distancefromjewel = int((tof_1.distance))
              rgb_2.setColor(1, 0xff0000)
              rgb_2.setColor(2, 0xff0000)
              rgb_2.setColor(3, 0xff0000)
              rgb.setColorAll(0xff0000)
              speaker.tone(1800, 200)
              label5.setText('Scan ID card to turn off')
              wait_ms(500)
            rgb.setColorAll(0x33ff33)
            speaker.tone(1000, 5000)
            label2.show()
            label5.show()
            label5.setText('Press B to disable shop security')
            label2.setText('Ignore to keep current settings')
            wait(2)
            rgb.setColorAll(0x000000)
            rgb_2.setColor(1, 0x000000)
            rgb_2.setColor(2, 0x000000)
            rgb_2.setColor(3, 0x000000)
          elif (pir_0.state) == 1:
            rgb_2.setColor(1, 0xffffcc)
            rgb_2.setColor(2, 0xffffcc)
            rgb_2.setColor(3, 0xffffcc)
          elif (rfid_0.readUid()) == '803f4fc3':
            label5.show()
            label2.show()
            label5.setText('Security system disabled,')
            label2.setText(' scan card again to enable')
            rgb.setColorAll(0x33ff33)
            speaker.tone(1000, 5000)
            wait(3)
            while not (rfid_0.readUid()) == '803f4fc3':
              wait_ms(1)
            speaker.tone(1000, 5000)
            rgb.setColorAll(0xff0000)
            wait(2)
            rgb.setColorAll(0x000000)
          label3.hide()
          label2.hide()
          label5.hide()
        label5.show()
        label5.setText('Shop security disabled')
        speaker.tone(1000, 5000)
        rgb.setColorAll(0xff0000)
        wait(2)
        label5.hide()
    elif (rfid_0.readUid()) != '803f4fc3':
      label0.show()
      rgb.setColorAll(0xff0000)
      label0.setText('Access denied')
      wait(2)
      rgb.setColorAll(0x000000)
      label0.hide()
  else:
    rgb_2.setColor(1, 0x000000)
    rgb_2.setColor(2, 0x000000)
    rgb_2.setColor(3, 0x000000)
    shop.setText('Shop Status')
    label0.setText('Please scan your card')
    label1.setText('RFID Card ID')
    rgb.setColorAll(0x000000)
  wait_ms(2)

Anti-theft system