Project Files of IoT Smart Curtain with ESP32 - Proteus Simulation

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  IoT Smart Curtain with ESP32 - Proteus Simulation Project V1.0
  The Engineering Projects - www.TheEngineeringProjects.com
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IMPORTANT LINKS
  The project tutorial (circuit, code, simulation results):
    https://www.theengineeringprojects.com/2026/11/iot-smart-curtain-esp32-proteus-simulation.html
  The libraries this project is built from (each post has its own full download and tutorial):
    ESP32 DevKit V1 board (and the TEP Boards for Proteus Arduino add-on):
      https://www.theengineeringprojects.com/2026/10/esp32-devkit-v1-library-for-proteus-v2-0.html
    28BYJ-48 stepper motor and ULN2003 driver:
      https://www.theengineeringprojects.com/2026/10/28byj-48-uln2003-stepper-motor-library-for-proteus-v1-0.html
    LDR light sensor:
      https://www.theengineeringprojects.com/2026/10/ldr-sensor-library-for-proteus.html
    TTP223 touch sensor:
      https://www.theengineeringprojects.com/2026/10/touch-sensor-library-for-proteus-v2-0.html
    5mm LED:
      https://www.theengineeringprojects.com/2026/11/5mm-led-library-for-proteus.html
    Resistor:
      https://www.theengineeringprojects.com/2026/11/resistor-library-for-proteus.html
    Laptop WiFi Monitor:
      https://www.theengineeringprojects.com/2026/10/laptop-wifi-monitor-library-for-proteus.html
    Mobile WiFi Monitor:
      https://www.theengineeringprojects.com/2026/10/mobile-wifi-monitor-library-for-proteus.html
  Support our free work: https://www.theengineeringprojects.com/donate

FILE STRUCTURE
ESP32-Smart-Curtain-TEP-v1.0/
|-- Proteus Library Files/
|   |-- TEPESP32V1.LIB                                 36.6 KB   a part of the project -> LIBRARY folder
|   |-- TEPLAPTOP.LIB                                  39.5 KB   a part of the project -> LIBRARY folder
|   |-- TEPLDR.LIB                                    289.8 KB   a part of the project -> LIBRARY folder
|   |-- TEPLED5MM.LIB                                  21.8 KB   a part of the project -> LIBRARY folder
|   |-- TEPMOBILE.LIB                                  13.1 KB   a part of the project -> LIBRARY folder
|   |-- TEPRESISTOR.LIB                               306.9 KB   a part of the project -> LIBRARY folder
|   |-- TEPTTP223.LIB                                  89.3 KB   a part of the project -> LIBRARY folder
|   |-- TEPULN2003.LIB                                 89.7 KB   a part of the project -> LIBRARY folder
|-- Proteus Model Files/
|   |-- TEPLDR.DLL                                    420.0 KB   a model -> MODELS folder
|   |-- TEPLED5MM.DLL                                 289.5 KB   a model -> MODELS folder
|   |-- TEPNET.DLL                                     2.89 MB   a model -> MODELS folder
|   |-- TEPRESISTOR.DLL                               311.0 KB   a model -> MODELS folder
|   |-- TEPTTP223.DLL                                 362.0 KB   a model -> MODELS folder
|   |-- TEPULN2003.DLL                                308.0 KB   a model -> MODELS folder
|-- Proteus Simulation/
|   |-- ESP32_Smart_Curtain.hex                        67.2 KB   the firmware
|   |-- ESP32-Smart-Curtain.pdsprj                     42.9 KB   the project simulation
|   |-- TEPLDR.DLL                                    420.0 KB   copy of the model
|   |-- TEPLED5MM.DLL                                 289.5 KB   copy of the model
|   |-- TEPNET.DLL                                     2.89 MB   copy of the model
|   |-- TEPRESISTOR.DLL                               311.0 KB   copy of the model
|   |-- TEPTTP223.DLL                                 362.0 KB   copy of the model
|   |-- TEPULN2003.DLL                                308.0 KB   copy of the model
|-- Arduino Code/
|   |-- ESP32_Smart_Curtain/ESP32_Smart_Curtain.ino     8.9 KB   the sketch (source of the .hex)
|-- README.txt                                        ~10.1 KB   this file
Total: 10.08 MB (unzipped). The C++ source code of the models is not included.

WHAT IS IT?
  A motorised roller curtain you can run in Proteus: an ESP32 opens it in the morning, closes it at night, takes a
  tap on a touch pad and lets any laptop or phone on the Wi-Fi move it to any position.
    * ULN2003 stepper driver board (ULN2003ADVTEP, DRV1) on the 5 V rail: IN1 - IN4 on D27, D26, D25, D33; its outputs
      A - D and COM go straight to the 28BYJ-48 5 V stepper (BYJ48TEP, M1): orange, yellow, pink, blue, red.
      Half steps; 4076 half steps = one turn of the output shaft (the gearbox is 63.68:1) = the curtain's full travel.
    * LDR light sensor module (LDRADVTEP, U2) on 3.3 V: A0 on D34 (ADC) - the daylight in %. LIGHT=NIGHT at the start.
    * TTP223 touch pad (TTP223ADVTEP, U3): IO on D4 (HIGH while touched); here on the 5 V rail (it runs on 2 - 5.5 V;
      use 3.3 V on a real ESP32).
    * LEDs (LED5MMGREENTEP / LED5MMYELLOWTEP) on D19 / D18 through 220 ohm: AUTO / MANUAL.
    * ESP32 DEVKIT V1 (U1) runs ESP32_Smart_Curtain.hex on TEP-WiFi at 192.168.1.101; the dashboard is on port 80.
    * Laptop WiFi Monitor (PC1) and Mobile WiFi Monitor (MOB1) open http://192.168.1.101/.
  The ULN2003's + and the board's VIN share the VCC net (the simulation's 5 V rail).
  The rules (at the top of the sketch):
    * AUTO: daylight (60 % or more) for 3 s opens the curtain, darkness (30 % or less) for 3 s closes it;
    * a tap on the touch pad opens or closes it (MANUAL); a tap while it moves stops it;
    * 2 ms a half step (500 half steps a second); the coils are switched off between moves.
  Its pages:
    /            the dashboard: the curtain in %, the position in half steps, the light, the mode, the events
    /open        open the curtain (MANUAL)
    /close       close the curtain (MANUAL)
    /half        move it to 50 % (MANUAL)
    /auto        back to AUTO: the light decides after 3 s
    /data        everything as JSON

TEST STATUS
  Tested in Proteus 8 Professional on Windows 11, the run that made the tutorial's screenshots (simulation times):
    * Start: "ready - the curtain closed, AUTO" at 2 s; "AUTO: dark 5 % for 3 s" at 5 s (LIGHT=NIGHT), nothing moves.
    * Sunny on the LDR: "moving to 100 % (AUTO: daylight 99 % for 3 s)" at 15 s; "the curtain is OPEN (100 %, 4076 half
      steps in 8539 ms)" at 24 s - the ULN2003 saw HALF STEP, about 481 steps/s, CW, 96 mA from 5 V.
    * A tap on the TTP223: "moving to 0 % (touch, MANUAL)" at 28 s; CLOSED at 36 s.
    * HALF from the laptop: "the curtain is part open (50 %, 2038 half steps in 4288 ms)" at 41 s.
    * AUTO from the phone at 44 s: open again at 52 s (daylight). Night on the LDR: "moving to 0 % (AUTO: dark 5 % for
      3 s)" at 58 s; CLOSED at 66 s.
  70 s of simulation took about 8 minutes on our PC with all the captures.

INSTALLATION
  1. Close Proteus. Extract the WHOLE zip file, for example to your Desktop.
  2. Copy the files from "Proteus Library Files" into the LIBRARY folder of Proteus, for example
     C:\Program Files (x86)\Labcenter Electronics\Proteus 8 Professional\LIBRARY
  3. Copy the files from "Proteus Model Files" into the MODELS folder (next to LIBRARY).
  4. Start Proteus. Press P in the schematic and search for ESP32 DEVKIT V1, ULN2003ADVTEP or BYJ48TEP to check that
     the parts are there.

RUN THE SIMULATION
  1. Open "Proteus Simulation\ESP32-Smart-Curtain.pdsprj". Keep the .hex and .DLL files beside it.
  2. Press Play. The ESP32 joins TEP-WiFi; it is night (the LDR's LIGHT=NIGHT), so the curtain stays closed.
  3. Open the Laptop WiFi Monitor (PC1) or the Mobile WiFi Monitor (MOB1) and press Go. Press Refresh to update it.
  4. In the LDR's pop-up (U2) press Sunny: 3 s later the curtain opens (the motor's dial turns one full turn).
  5. Tap the touch pad (U3, Tap in its pop-up): MANUAL, the curtain closes. HALF on the page: 50 %. AUTO: the light
     decides again. Night in the LDR's pop-up: the curtain closes.
  Your own sketch: the source is in "Arduino Code". Install the TEP Boards for Proteus add-on from the ESP32 DevKit V1
  post; choose Tools > Board > ESP32 DevKit V1 (TEP Proteus), export the compiled binary and set the board's PROGRAM
  property to the new .hex file. The same sketch runs on a real ESP32 Dev Module.

PROPERTIES USED IN THIS PROJECT
  U1 ESP32 DEVKIT V1          PROGRAM=ESP32_Smart_Curtain.hex
  DRV1 ULN2003ADVTEP          (no changes: the ON / OFF jumper ON)
  M1 BYJ48TEP                 (no changes)
  U2 LDRADVTEP                LIGHT=NIGHT
  U3 TTP223ADVTEP             (no changes: jumpers A and B open - momentary, active HIGH)
  PC1, MOB1                   HOMEPAGE=http://192.168.1.101/

TROUBLESHOOTING
  * The motor buzzes but does not turn: IN1 - IN4 are in the wrong order (the ULN2003's pop-up says WRONG ORDER).
  * The motor does not move at all: the ULN2003 has no 5 V on +, or its ON / OFF jumper is off.
  * The curtain never opens by itself: the mode is MANUAL - press AUTO - or the light is below 60 %.
  * A tap does nothing: the touch pad's IO is not on D4, or it has no supply (its pop-up says NO POWER).
  * "Connecting to TEP-WiFi......" never ends: the .hex file is missing beside the project, or TEPNET.DLL is not in
    MODELS. Copy the files again and restart Proteus.

LICENCES
  * The project, the sketch, the parts (LIB files) and the models (DLL files) are made by The Engineering Projects
    and are free for learning and for your own projects. The models use only standard Windows libraries.
    The C++ source code of the models is not included; the source code is not included for any model.
  * The .hex file is built from the sketch with TEP Boards for Proteus, the Arduino add-on in the ESP32 DevKit V1
    download (its licences are listed in that download). No third-party library is compiled into it.
  * Proteus is a product of Labcenter Electronics and is not included. ESP32 (Espressif Systems) and TTP223 (Tontek)
    are names of their owners; this project is not made or endorsed by them.

VERSION
  V1.0 - the first release of the project.
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