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T-Lite

SKU:K126

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Description

The T-Lite is an integrated thermal imaging temperature measurement device with online detection capabilities. This product is primarily composed of the M5StickC-Plus and HAT THERMAL, utilizing the MLX90640-BAA infrared imaging sensor. The main control is powered by the ESP32-PICO-D4 chip, featuring WIFI functionality, a 135 x 240 resolution TFT screen, and a built-in 160mAh battery. The name "T-Lite" represents Temperature (T) and Lite, signifying compactness and high integration. Users can set up a high-temperature warning function and view temperature images and data in real-time via cloud and local network. M5 also provides an online data API interface, allowing users to access remote images and corresponding data through EZData, facilitating engineering project applications.

Features

  • Developed based on ESP32-PICO, WiFi
  • User button, LCD (1.14 inch), power/reset button
  • 160 mAh lithium battery
  • Integrated passive buzzer
  • Field of view: 110°×75°
  • Temperature measurement range: -40°C ~ 300°C

Includes

  • 1 × T-Lite
  • 1 × StickC-Plus
  • 1 × Lanyard
  • 1 × USB Type-C cable (50cm)
  • 1 × User manual

Applications

  • Temperature detection and warning
  • Circuit temperature anomaly monitoring
  • High-precision non-contact temperature measurement
  • Biological movement monitoring
  • Visual infrared imaging

Specifications

Resources Parameters
MCU ESP32-PICO,240MHz dual core, 600 DMIPS, 520KB SRAM
Sensor MLX90640
Field of View 110°×75°
Resolution 32×24
Flash Memory 4MB Flash
Power Input 5V @ 500mA
Port Type-C
LCD screen 1.14 inch, 135 x 240 Colorful TFT LCD, ST7789v2
MIC SPM1423
Buzzer Passive buzzer
PMU AXP192
Battery 160 mAh @ 3.7V
Product Size 69.0 × 26.6 × 16.35mm
Package Size 110.0 × 87.0 × 25mm
Product Weight 30.1g
Package Weight 62.9g

User Manual

Electronic Manual

module size

Model Size

module size

Datasheets

Softwares

Quick Start

PlatformIO

EasyLoader

Easyloader Download Link Notes
T-Lite Firmware Easyloader download /

Emissivity Modification Guide

Emissivity (ε)
Infrared sensors default to an ideal blackbody (ε=1.0), but most materials reflect ambient radiation, causing measurement errors. By setting the correct emissivity (ρ = 1–ε), you can compensate for reflections and improve measurement accuracy.
Material Emissivity ε
Human skin 0.98
Water 0.93
Plastic (opaque) 0.95
Asphalt 0.95
Concrete 0.95
Brick 0.90
Glass (plate) 0.85
Wood (natural) 0.94
Aluminum (oxidized) 0.30
Steel (oxidized) 0.80

Note: Be sure to set the appropriate emissivity parameter in your API or library calls based on the target material to ensure measurement accuracy. In the source code src/mlx90640.cpp, the default emissivity is hard‑coded in the calcTempData() function:

1141 void MLX90640_Class::calcTempData(const uint16_t *framedata,
1142                                    temp_data_t *tempdata,
1143                                    const temp_data_t *prev_tempdata,
1144                                    uint32_t filter_level, uint8_t monitor_width,
1145                                    uint8_t monitor_height) {
1146     float emissivity = 0.95;  // ← Original line: 1146 — change to desired ε value

1148     float Ta = MLX90640_params.MLX90640_GetTa(framedata);
1149     float tr = Ta - TA_SHIFT;
1150     bool subpage = framedata[833];
1151     tempdata->subpage = subpage;

1153     MLX90640_params.MLX90640_CalculateTo(
1154       framedata, emissivity, tr,
1155       tempdata, prev_tempdata, filter_level);

1157     // …additional processing…
1158 }

After modifying line 1146 (float emissivity = 0.95;) to your target emissivity, save and recompile to apply the change.

Video

  • Product Tutorial