Project Files of IoT Kiln Temperature Monitor with Raspberry Pi 5 - Proteus Simulation

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  IoT Kiln Temperature Monitor with Raspberry Pi 5 - 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-kiln-temperature-monitor-raspberry-pi-5-proteus-simulation.html
  The libraries this project is built from (each post has its own full download and tutorial):
    Raspberry Pi 5 board:
      https://www.theengineeringprojects.com/2026/10/raspberry-pi-5-library-for-proteus.html
    MAX6675 thermocouple module and the K-type probe:
      https://www.theengineeringprojects.com/2026/10/max6675-thermocouple-library-for-proteus-v1-0.html
    LCD 12864 (ST7920):
      https://www.theengineeringprojects.com/2026/10/lcd-12864-library-for-proteus-v1-0.html
    Mini speaker:
      https://www.theengineeringprojects.com/2026/11/mini-speaker-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
Pi-5-Kiln-Monitor-TEP-v1.0/
|-- Proteus Library Files/
|   |-- TEPLAPTOP.LIB                                  39.5 KB   a part of the project -> LIBRARY folder
|   |-- TEPLCD12864.LIB                               131.8 KB   a part of the project -> LIBRARY folder
|   |-- TEPMAX6675.LIB                                 57.8 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
|   |-- TEPRPI5.LIB                                    60.5 KB   a part of the project -> LIBRARY folder
|   |-- TEPSPEAKER.LIB                                 11.0 KB   a part of the project -> LIBRARY folder
|-- Proteus Model Files/
|   |-- TEPLCD12864.DLL                               318.0 KB   a model -> MODELS folder
|   |-- TEPMAX6675.DLL                                314.5 KB   a model -> MODELS folder
|   |-- TEPNET.DLL                                     2.89 MB   a model -> MODELS folder
|   |-- TEPRESISTOR.DLL                               311.0 KB   a model -> MODELS folder
|   |-- TEPSPEAKER.DLL                                286.0 KB   a model -> MODELS folder
|   |-- TEPPi/python/                                 17.54 MB   Python 3.11 embeddable -> MODELS\TEPPi (33 files)
|   |-- TEPPi/runtime/                                 1.11 MB   TEP Pi runtime, gpiozero -> MODELS\TEPPi (87 files)
|-- Proteus Simulation/
|   |-- kiln_monitor.py                                12.0 KB   the program PI1 runs
|   |-- Pi-5-Kiln-Monitor.pdsprj                       37.4 KB   the project simulation
|   |-- TEPLCD12864.DLL                               318.0 KB   copy of the model
|   |-- TEPMAX6675.DLL                                314.5 KB   copy of the model
|   |-- TEPNET.DLL                                     2.89 MB   copy of the model
|   |-- TEPRESISTOR.DLL                               311.0 KB   copy of the model
|   |-- TEPSPEAKER.DLL                                286.0 KB   copy of the model
|-- Python Code/
|   |-- kiln_monitor.py                                12.0 KB   the program (the same file)
|-- README.txt                                        ~10.4 KB   this file
Total: 27.52 MB (unzipped). The C++ source code of the models is not included.

WHAT IS IT?
  A kiln temperature monitor you can run in Proteus: a Raspberry Pi 5 reads a K-type thermocouple through a MAX6675,
  shows the temperature and the firing stage on an LCD 12864, sounds the alarms on a mini speaker and serves a web
  dashboard - for a bisque firing to 1000 C (about cone 06).
    * MAX6675 module (MAX6675ADVTEP, U1) on 3V3, SPI0: SO to MISO (GPIO9), SCK to SCLK (GPIO11), CS to CE0 (GPIO8);
      the K-type probe (THERMOCOUPLEKTEP, TC1, TEMPERATURE=25) on T+ / T-. A 16-bit word: D14 - D3 = the
      temperature in 0.25 C steps (0 - 1023.75 C), D2 = 1 when the thermocouple is open.
    * LCD 12864 blue (LCD12864BLUEADVTEP, LCD1) on the 5 V rail, SERIAL mode (PSB to GND): CS on RS = GPIO17, SID
      on R/W = GPIO27, SCLK on E = GPIO22, RST = GPIO23; the text layer, four lines of 16 characters.
    * Mini speaker (MINISPEAKER28TEP, LS1): + through R1 330 ohm from GPIO18, - to GND; lgpio PWM tones.
    * RASPBERRY PI 5 (PI1) runs kiln_monitor.py on Ethernet at 192.168.1.51; the dashboard is on port 8000.
    * Laptop WiFi Monitor (PC1) and Mobile WiFi Monitor (MOB1) open http://192.168.1.51:8000/.
  The rules (at the top of kiln_monitor.py):
    * stages: COLD < 50 C, DRYING to 300 C, HEATING to 950 C, PEAK; TARGET REACHED at the target (1000 C; three
      beeps; it holds down to the target - 5 C against the reading's noise); OVER TEMP above the target + 10 C (a
      siren until muted or cooled); COOLING 20 C under the peak; SAFE TO OPEN under 65 C after a firing; PROBE OPEN
      (a beep every 2 s);
    * a firing starts above 100 C; the firing time counts the time above 100 C; a new alarm always sounds again.
  Its pages:
    /            the dashboard: the temperature, the stage, the alarm, the target, the peak, the firing time, the events
    /mute        silence the alarm
    /reset       a new firing (the peak and the timer)
    /down /up    the target -/+ 10 C (500 - 1020 C)
    /data        everything as JSON

TEST STATUS
  Tested in Proteus 8 Professional on Windows 11, the run that made the tutorial's screenshots (the program's times):
    * Start: 25.00 C, COLD (the MAX6675's word 0x0320 / 0x0328, 25.00 / 25.25 C).
    * BOILING 100 C: DRYING at 15.0 s; SOLDER 350 C: HEATING at 18.0 s (350.25 C).
    * KILN 1000 C: TARGET REACHED at 22.1 s, three beeps; it held through readings of 999.75 C.
    * +5, +5: 1010.25 C - a quarter of a degree over the limit - OVER TEMP at 31.1 s, the siren (1500 / 2500 Hz);
      +5: 1015 C; MUTE from the phone at 37.5 s.
    * -50 (965 C): COOLING at 41.6 s (the peak 1015.25 C); OVEN 200 C, ROOM 25 C: SAFE TO OPEN at 47.1 s.
    * Break the wire: PROBE OPEN at 52.2 s (word 0x0004, D2 = 1); repaired: SAFE TO OPEN at 58.2 s.
    * NEW FIRING from the laptop at 60.5 s: COLD at 60.7 s (the peak 25.25 C). The firing time was 32 s above 100 C.
    * The MAX6675: 135 reads, 272 conversions, 12 reads with the thermocouple open.
  An earlier run showed two things the program now handles: at exactly 1000 C the reading's 0.25 C noise flipped
  the stage between TARGET REACHED and PEAK every half second (now a 5 C hysteresis), and a rate of rise means
  nothing when the simulated probe jumps at once (the LCD shows the firing time instead).
  68 s of simulation took about 5 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 everything in "Proteus Model Files" - the DLL files AND the TEPPi folder - into the MODELS folder
     (next to LIBRARY). TEPPi holds the Python 3.11 that the Raspberry Pi board runs and our TEP Pi runtime.
  4. Start Proteus. Press P in the schematic and search for RASPBERRY PI 5, MAX6675ADVTEP or LCD12864BLUEADVTEP to
     check that the parts are there.

RUN THE SIMULATION
  1. Open "Proteus Simulation\Pi-5-Kiln-Monitor.pdsprj". Keep kiln_monitor.py and the DLL files beside it.
  2. Press Play. The LCD shows the kiln at about 25 C, COLD.
  3. Open the Laptop WiFi Monitor (PC1) or the Mobile WiFi Monitor (MOB1) and press Go. Press Refresh to update it.
  4. In the MAX6675's pop-up (U1) pick BOILING 100 C, SOLDER 350 C, KILN 1000 C, then +5 three times: OVER TEMP.
     MUTE on the dashboard, -50, ROOM 25 C: SAFE TO OPEN. Break the wire: PROBE OPEN.
  Your own program: edit kiln_monitor.py beside the project (the limits at the top) and press Play.

PROPERTIES USED IN THIS PROJECT
  PI1 RASPBERRY PI 5          PROGRAM=kiln_monitor.py, ETHERNET=IN (192.168.1.51)
  TC1 THERMOCOUPLEKTEP        TEMPERATURE=25 (the tip at the start)
  U1 MAX6675ADVTEP            (no changes: AMBIENT 25 C, the board's cold junction)
  LCD1 LCD12864BLUEADVTEP     (no changes)
  R1 RESISTOR4BANDTEP         330 ohm
  PC1, MOB1                   HOMEPAGE=http://192.168.1.51:8000/

TROUBLESHOOTING
  * The temperature reads 0 or jumps: SO and SCK swapped, or the SPI mode is not 0.
  * PROBE OPEN all the time: the probe is not on T+ / T-, or a lead is broken.
  * The temperature falls when the kiln heats: the probe's leads are swapped (T+ is the yellow lead).
  * The LCD stays blank: PSB is not tied to GND (the module then expects the parallel bus), or no 5 V on VDD / BLA.
  * The terminal cannot start Python: the TEPPi folder is not in MODELS (step 3 of INSTALLATION), or an older one.

LICENCES
  * The project, the program, 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.
  * TEPPi\python is the Python 3.11 Windows embeddable package (Python Software Foundation License); TEPPi\runtime
    holds our TEP Pi runtime with gpiozero and colorzero (BSD licences) - their licence files are inside the folders.
  * Proteus is a product of Labcenter Electronics and is not included. Raspberry Pi is a trademark of Raspberry Pi
    Ltd; MAX6675 is a product of Analog Devices (formerly Maxim Integrated). This project is not made or endorsed by
    them. A real kiln needs its own kiln sitter or limit switch: never rely on software alone to cut the power.

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