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WSAL30136 – Thermal-Camera-ESP32-Module/en

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Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The module pairs an ESP32-S3-WROOM-1 with an 80×62-pixel infrared sensor and is powered via USB Type-C, Wi-Fi/Bluetooth, and an optional lithium-battery header. It produces real-time thermal maps in the 8–14 µm spectral band.

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Technical overview

  • Control logic: ESP32-S3-WROOM-1 with Xtensa LX7 dual-core up to 240 MHz; integrates 512 KB SRAM, 384 KB ROM, 8 MB PSRAM, and 16 MB Flash.
  • Optics: Two variants – standard (45° H) at 56°(D) × 45°(H) × 34°(V) and wide-angle (90° H) at 122°(D) × 90°(H) × 67°(V); wavelength range 8–14 µm.
  • Measurement: Target temperature range -40 °C to 400 °C; module operating range -40 °C to 85 °C; NETD 125 mK; max frame rate 25 FPS (may drop due to Wi-Fi interference).
  • Interfaces: USB Type-C for power and programming; onboard antenna for 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 LE; two 2×10 solder pads providing 14 GPIO, I²C, and UART for expansion.
  • Power: 5 V supply, nominal current about 127 mA; optional 3.7 V MX1.25 mm lithium battery header for extended operation.
  • Dimensions: 29.0 × 29.0 mm compact form factor, suitable for embedded applications.
  • Configuration via Android Bluetooth app: default device name “ESP32S3 BlueFi”; app supports Android only; after changing Wi-Fi parameters click “Apply Changes”.
  • Host preview: In AP mode, default IP 192.168.4.1 port 3333; in STA mode the computer must join the same Wi-Fi as the module; example IP e.g. 192.168.9.131:3333.
  • Firmware update: Via USB connection using flashing software; address set to 0; press Reset after flashing to restart.
  • Development environment: Demos use VS Code + ESP-IDF 5.2.3; open project folder “Thermal-ESP32-Web-Demo”, select ESP32S3 board, then run “Build Project” and “Flash Device”.

Commands and examples – verify before use:  

ESP32S3 BlueFi
192.168.4.1:3333
WSThermal / 12345678
192.168.9.131:3333

Notes and version constraints

  • The Bluetooth configuration app works only on Android devices; iOS is not supported.
  • In AP mode some computers automatically disconnect from the “WSThermal” hotspot; reconnecting may be required.
  • After viewing images in AP mode, press the Reset button before switching back to STA mode.
  • Actual frame rate may fall below 25 FPS when Wi-Fi signals cause interference.
  • For targets exceeding the field of view by more than 25 %, additional accuracy conditions apply (humidity < 95 %, no condensation on the lens).
  • The provided demos require VS Code and ESP-IDF 5.2.3; other environments must be configured manually.

Source and revision record

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