Team Group 5: Morgan Ng, Chen Hongyu, javier heng, Desmond Chad

Published February 10, 2024

Smart Retail Inventory Management

Monitor stock levels efficiently allocate workers, monitor temperature of the stocks and prevent theft

IntermediateFull instructions provided191

Things used in this project

Hardware components

M5Stack FIRE V2.7

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

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

M5Stack Mini RFID Unit RC522 Module Sensor

Story

Driving Question:

How can we use the integration of emerging technologies to optimise stock levels and manpower management to improve operational efficiency, minimize costs, implement temperature detection technology and enhance security measures?

Project introduction:

In our project, we aim to build a product which can help monitor the stock levels and specific temperatures for different stocks, efficiently allocate manpower when needed and help to keep our stock safe if there’s an intruder.

Research on Problems:

Insufficient manpower in stock management:

The retail industry in Singapore is facing a manpower shortage, with nine in 10 retail employees either “Strongly Agree” (45%) or “Somewhat Agree”(48%) that there is a manpower shortage.

Reference: https://www.humanresourcesonline.net/singapore-s-retail-industry-is-facing-a-manpower-shortage

Poor inventory management can have various kinds of negative impacts:

Wasted time and resources : Workers may spend too much time manually maintaining inventory or correcting mistakes, taking time away from more important duties.
Stockout and Overstock: Insufficient inventory management can cause stockout which may impact sales and leave customers unhappy. On the other hand, it can result in overstocking, which can be excess stocks that the company can’t sell hence the loss of profit.

Risk of product spoilage due to temperature inconsistency:

Products such as raw or deli meat, prepared salads, sliced fruit, juices, milk, cheese and other dairy products must be stored or displayed between 0ºC and 5ºC for up to three days before they become unsafe to eat. After this time, harmful bacteria may have slowly developed and present a health risk.

Reference: https://www.qld.gov.au/health/staying-healthy/food-pantry/starting-a-food-business/premises-and-equipment/temperature-control

Vulnerability of stock theft:

For security, it needs to be tight to keep track large quantities of high-quality meat and many other expensive products.

Objective:

The objective of this project is to create a device that minimizes the challenges posed by manpower shortages in stockroom management. Additionally, the device will also include temperature detection features to guarantee ideal storage conditions and prevent theft.

1. Stockroom Monitoring System (TOF sensor)

We would implement sensors to monitor stock levels
It will alert workers only when stocks are very low.

Hence, it will reduce the workload for workers by replacing labour to analyze the number of goods left in the stockrooms.

2. Temperature Detection and Controls (ENV II).

We would also incorporate temperature sensors to track the environment and temperature of the stockroom
We also added a climate control system where the temperature can be adjusted if necessary.

3. Security Measures (RFID sensor) & (PIR sensor)

We would install a card reader where only workers with an access card can enter the stockroom.
If anyone were to try to use a card that isn't given access to the stock room, the alarm would also sound.
Once it is after working hours, the store would activate a security system at night where if any movement is detected it will sound off the alarm.

Concept (Usage):

Purpose of TOF:

Press button A to start the Tof sensor. When the stocks are closer to the sensor it will show a blue light (Full Stock), At the safe level of stocks, it will show a green light(80% full). If stock is in the mid-range it will show an orange light(60% full), if stock is low it will show red (40% full) and if stock is empty, it will show flashing red and yellow lights while beeping(Please restock). If B is pressed, it will turn off the Tof sensor for workers to restock.

Purpose of ENV (II)

The ENV(ii) sensor is used to detect adetrimental temperature of the stocks. Once the actual temperature falls below or above the desired temperature, it will beep constantly and blink red to alert the workers to change the temperature of the refrigerator manually and wait for it to go towards the desired temperature.

Purpose of RFID

The RFID sensor is used to read the card when a nearby card is detected and the access card UID is correct, the m5 stack RGB would show green.It will turn off the security system (PIR Sensor) and allow entry.
If an unauthorised card is tapped, the security system would go off endlessly until an authorised card is read.

Purpose of PIR

Once button B is pressed, it will activate the security system. Once it is after working hours, where if any movement is detected it will sound off the alarm.

Conclusion:

In conclusion, a comprehensive solution to labour shortages and stockroom issues is offered by designing a stockroom management device with TOF sensors, ENV II for temperature control, and RFID/PIR sensors forsecurity measures. The gadget represents an important advancement in stockroom management technology as it automates stock monitoring, ensures ideal storage conditions, and implements strong security measures. Hence improving operating efficiency.

Flow chart for ENV(II) and TOF sensor

1.Flowchart for PIR and RFID sensor

2.Flowchart for PIR and RFID sensor

Foam board

Part 1 of ENV(ii) and TOF sensor (Blocky)

2 Part of ENV(ii) and TOF sensor (Blocky)

3 Part of ENV(ii) and TOF sensor (Blocky)

Button for ENV(ii) and TOF sensor (Blocky)

Part 1 of RFID and PIR sensor (Blocky)

Part 2 of RFID and PIR sensor (Blocky)

Part 3 of RFID and PIR sensor (Blocky)

Part 4 of RFID and PIR sensor (Blocky)

Part 5 of RFID and PIR sensor (Blocky)

Part 6 of RFID and PIR sensor (Blocky)

Presentation on M5 stack smart retail

Code

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


setScreenColor(0x000000)
rfid_0 = unit.get(unit.RFID, unit.PORTA)
pir_3 = unit.get(unit.PIR, unit.PORTB)


IsRunning2 = None
IsRunning3 = None
IsRunning = None



label0 = M5TextBox(81, 51, "Tap Card", lcd.FONT_DejaVu24, 0xFFFFFF, rotate=0)
label4 = M5TextBox(56, 7, "Intruder!!!", lcd.FONT_DejaVu40, 0xFFFFFF, rotate=0)
image0 = M5Img(100, 86, "res/intru120px.jpg", True)
label3 = M5TextBox(91, 214, "Detecting...", lcd.FONT_DejaVu24, 0xFFFFFF, rotate=0)
label1 = M5TextBox(230, 86, "Text", lcd.FONT_Default, 0x000000, rotate=0)




label3.setText('Detecting...')
label4.setText('Intruder!!!')
label4.hide()
image0.changeImg("res/default.jpg")
image0.hide()
while True:
  label0.setPosition(81, 51)
  label0.setText('Device is off')
  label3.hide()
  IsRunning3 = False
  if btnA.isPressed():
    IsRunning = True
  if btnB.isPressed():
    IsRunning2 = True
  while IsRunning == True:
    label0.setPosition(104, 53)
    label0.setText('Tap card')
    if rfid_0.isCardOn():
      label1.setText(str(rfid_0.readUid()))
      if (rfid_0.readUid()) == 'a4ce732b32':
        label0.setPosition(59, 51)
        label0.setText('Access Granted')
        rgb.setColorAll(0x33ff33)
        speaker.tone(1000, 200)
        IsRunning = False
        image0.hide()
        label4.hide()
        rgb.setColorAll(0x000000)
        wait(1)
      else:
        IsRunning3 = True
        while IsRunning3 == True:
          label4.setText('Intruder!!!')
          image0.show()
          speaker.tone(1500, 200)
          rgb.setColorAll(0xff0000)
          if rfid_0.isCardOn():
            label1.setText(str(rfid_0.readUid()))
            if (rfid_0.readUid()) == 'a4ce732b32':
              label0.setPosition(59, 51)
              label0.setText('Access Granted')
              rgb.setColorAll(0x33ff33)
              speaker.tone(1000, 200)
              IsRunning = False
              IsRunning3 = False
              image0.hide()
              label4.hide()
              rgb.setColorAll(0x000000)
              wait(1)
            else:
              label0.setPosition(85, 50)
              label0.setText('Wrong card')
              rgb.setColorAll(0xff0000)
              speaker.tone(100, 500)
              rgb.setColorAll(0x000000)
              wait(1)
  while IsRunning2 == True:
    label0.setPosition(104, 53)
    label0.setText('Tap card')
    if (pir_3.state) == 1:
      label0.hide()
      label3.hide()
      label4.show()
      image0.show()
      speaker.tone(1500, 200)
      rgb.setColorAll(0xff0000)
    else:
      label0.show()
      label3.show()
      label4.hide()
      image0.hide()
      rgb.setColorAll(0x000000)
    if rfid_0.isCardOn():
      label1.setText(str(rfid_0.readUid()))
      if (rfid_0.readUid()) == 'a4ce732b32':
        label0.setPosition(59, 51)
        label0.setText('Access Granted')
        rgb.setColorAll(0x33ff33)
        speaker.tone(1000, 200)
        IsRunning2 = False
        image0.hide()
        label4.hide()
        rgb.setColorAll(0x000000)
        wait(1)
      else:
        IsRunning3 = True
        while IsRunning3 == True:
          label4.setText('Intruder!!!')
          image0.show()
          speaker.tone(1500, 200)
          rgb.setColorAll(0xff0000)
          if rfid_0.isCardOn():
            label1.setText(str(rfid_0.readUid()))
            if (rfid_0.readUid()) == 'a4ce732b32':
              label0.setPosition(59, 51)
              label0.setText('Access Granted')
              rgb.setColorAll(0x33ff33)
              speaker.tone(1000, 200)
              IsRunning3 = False
              IsRunning2 = False
              image0.hide()
              label4.hide()
              rgb.setColorAll(0x000000)
              wait(1)
            else:
              label0.setPosition(85, 50)
              label0.setText('Wrong card')
              rgb.setColorAll(0xff0000)
              speaker.tone(100, 500)
              rgb.setColorAll(0x000000)
              wait(1)
  wait_ms(2)

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


setScreenColor(0x222222)
env2_0 = unit.get(unit.ENV2, unit.PAHUB0)
pahub_0 = unit.get(unit.PAHUB, unit.PORTA, 0x70)
tof_2 = unit.get(unit.TOF, unit.PAHUB1)


DesiredTemperature = None
IsRunning = None
Distance = None



label1 = M5TextBox(190, 25, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0)
label3 = M5TextBox(90, 106, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0)
image1 = M5Img(190, 140, "res/2_.jpg", True)
label2 = M5TextBox(190, 72, "Text", lcd.FONT_Default, 0xFFFFFF, rotate=0)
label5 = M5TextBox(31, 72, "Desired Temperature:", lcd.FONT_Default, 0xFFFFFF, rotate=0)
label4 = M5TextBox(32, 106, "Stock:", lcd.FONT_Default, 0xFFFFFF, rotate=0)
label0 = M5TextBox(32, 26, "Current Temperature:", lcd.FONT_Default, 0xFFFFFF, rotate=0)

from numbers import Number



def buttonC_wasPressed():
  global DesiredTemperature, IsRunning, Distance
  DesiredTemperature = (DesiredTemperature if isinstance(DesiredTemperature, Number) else 0) + 1
  label2.setText(str(DesiredTemperature))
  pass
btnC.wasPressed(buttonC_wasPressed)

def buttonC_wasDoublePress():
  global DesiredTemperature, IsRunning, Distance
  DesiredTemperature = (DesiredTemperature if isinstance(DesiredTemperature, Number) else 0) + -1
  label2.setText(str(DesiredTemperature))
  pass
btnC.wasDoublePress(buttonC_wasDoublePress)


DesiredTemperature = 27
label1.setText(str(env2_0.temperature))
label2.setText(str(DesiredTemperature))
while True:
  image1.hide()
  if btnA.isPressed():
    IsRunning = True
    while IsRunning == True:
      image1.hide()
      Distance = int(((tof_2.distance) / 10))
      if Distance >= 32:
        image1.show()
        rgb.setColorAll(0xff0000)
        speaker.tone(1800, 750)
        label3.setText('Please restock')
        wait(1)
        rgb.setColorAll(0xffcc00)
      elif Distance >= 24:
        label3.setText('Stock is 40% Full')
        rgb.setColorAll(0xff0000)
      elif Distance >= 14:
        label3.setText('Stock is 60% Full')
        rgb.setColorAll(0xff6600)
      elif Distance >= 8:
        label3.setText('Stock is 80% Full')
        rgb.setColorAll(0x006600)
      elif Distance >= 4:
        label3.setText('Stock is Full')
        rgb.setColorAll(0x000099)
      if btnB.isPressed():
        IsRunning = False
  rgb.setColorAll(0x000000)
  wait(0.75)
  rgb.setColorAll(0xffff00)
  if DesiredTemperature > (env2_0.temperature) + 1:
    while DesiredTemperature > (env2_0.temperature) + 1:
      speaker.tone(800, 200)
      rgb.setColorAll(0xff0000)
      wait_ms(500)
      rgb.setColorAll(0x000000)
      wait_ms(500)
  elif DesiredTemperature < (env2_0.temperature) - 1:
    while DesiredTemperature < (env2_0.temperature) - 1:
      speaker.tone(1800, 200)
      rgb.setColorAll(0xff0000)
      wait_ms(500)
      rgb.setColorAll(0x000000)
      wait_ms(500)
  wait_ms(2)

Smart Retail Inventory Management