DIY Cooking Temperature Meter: Difference between revisions

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(Created page with "== Introduction == A simple (but updatable) cooking thermometer based on ESP32. Functions * Measure, log, display and save the temperature * Send data using bt or create a local web server which shows the data. * Allow taking timed photos (a photo at a given time) and show it on a (saved) temp log. == Material ==")
 
 
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== Material ==
== Material ==
<gallery>
Esp32 display back.jpg|The ESP 32
Esp32 display front.jpg|The front side of the ESP32 with the display
Batteryshieldv3 front.jpg|The battery shield from the front.
Batteryshieldv3 back.jpg|The battery shield from the back. The two leds1, L1 and L2 are in the middle of the board.
DIY cooking temp samplecode.png|A sample file from the provider.
</gallery>
=== List ===
* ESP32: ideaspark® ESP32 Entwicklungsboard 1,14 Zoll 135x240 full color LCD-Display,CH340,WiFi+BL. ST7789 driver, I2C. CH340
** Display area: 14.864 × 24.912 mm<sup>2</sup>
** Panel size: 17.6 × 31.0 × 1.6 mm<sup>3</sup>
** Display current 20mA.
** Display ports: VCC: VCC, GND: GND, D2(GPIO2): DC, D4: RST, D15: CS, D18: SCLK, D23: MOSI, D32: BLK.
** https://manuals.plus/asin/B0D6QXC813
*** Note: WiFi and Display Coexistence (Important)
* Temperature probe; THERMOPRO copy (including TP20, TP17, and TP-16, TP-16S,TP08S, TP25, TP07, TP17H, TP27, TP06S, TP09, TP28). Max temp 380°C (716°F) with 3.5 mm stereo jack.
* Battery pack: Battery Shield V3 Raspberry Pi / Arduino / ESP32 - 1x 18650 (from FunDuino)
** https://nerd-corner.com/download/1039/?tmstv=1755621929
** Breakdown of the components: https://www.edn.com/battery-shield/
** https://nerd-corner.com/review-battery-shield-v3-diy-powerbank-with-lipo-18650/
** https://www.youtube.com/watch?v=T70mBHeIOZA
=== ESP32 ===
<gallery>
Esp32 display back VIN.jpg
Esp32 display back regulator.jpg| The LM1117 1.2V 800-mA, Low-Dropout Linear Regulator
</gallery>
Powering
* Never connect an external power source to the 3V3 pin while powering the ESP32 board via USB. This will cause damage to many boards!
* The VIN pin (sometimes labeled V5 or V5.0) can be used to power the ESP32 with an external regulated 5V DC power source
* you can power your ESP32 development board via the 3V3 pin.
See also
* https://esp32.com/viewtopic.php?t=40425
* https://forums.adafruit.com/viewtopic.php?t=208238&__cf_chl_f_tk=ttJRikxAdvhyUomGA3.7MIrCJ4_oN61zEkvdO0ihKmk-1783086585-1.0.1.1-YREDl6f36g.Q3yAgKoz6mc9s7QVpSaxWy4SarKdrx2Q
=== Battery Pack ===
No reverse voltage protection!
The charging voltage is 4.2 V and the charging current is 500 mA. Note the on/off switch, when plugging or unplugging the lipo battery, the On/OFF switch only switches the USB port. The 3 x 3 V and 3 x 5 V solder pins cannot be switched on and off by this switch
Deep discharge protection
The charging process on the module is indicated by a LED. Red means that the battery is charging and green signifies that charging is complete.
The battery shield connec
== Programming ==
* Show the temperature log.
* Create a wifi and a local webserver
https://github.com/ImpulseAdventure/GUIslice https://blog.kamlatech.in/live-plot-sensor-data-on-tft-display
LVGL graphical library
https://www.youtube.com/watch?v=qZ055lfGQKA

Latest revision as of 17:15, 3 July 2026

Introduction

A simple (but updatable) cooking thermometer based on ESP32.

Functions

  • Measure, log, display and save the temperature
  • Send data using bt or create a local web server which shows the data.
  • Allow taking timed photos (a photo at a given time) and show it on a (saved) temp log.

Material

  • The ESP 32

    The ESP 32

  • The front side of the ESP32 with the display

    The front side of the ESP32 with the display

  • The battery shield from the front.

    The battery shield from the front.

  • The battery shield from the back. The two leds1, L1 and L2 are in the middle of the board.

    The battery shield from the back. The two leds1, L1 and L2 are in the middle of the board.

  • A sample file from the provider.

    A sample file from the provider.

List

ESP32

  • The LM1117 1.2V 800-mA, Low-Dropout Linear Regulator

    The LM1117 1.2V 800-mA, Low-Dropout Linear Regulator

Powering

  • Never connect an external power source to the 3V3 pin while powering the ESP32 board via USB. This will cause damage to many boards!
  • The VIN pin (sometimes labeled V5 or V5.0) can be used to power the ESP32 with an external regulated 5V DC power source
  • you can power your ESP32 development board via the 3V3 pin.

See also

Battery Pack

No reverse voltage protection!

The charging voltage is 4.2 V and the charging current is 500 mA. Note the on/off switch, when plugging or unplugging the lipo battery, the On/OFF switch only switches the USB port. The 3 x 3 V and 3 x 5 V solder pins cannot be switched on and off by this switch

Deep discharge protection


The charging process on the module is indicated by a LED. Red means that the battery is charging and green signifies that charging is complete.


The battery shield connec

Programming

  • Show the temperature log.
  • Create a wifi and a local webserver

https://github.com/ImpulseAdventure/GUIslice https://blog.kamlatech.in/live-plot-sensor-data-on-tft-display

LVGL graphical library

https://www.youtube.com/watch?v=qZ055lfGQKA

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