T-Lite

SKU:K126

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

Based on ESP32-PICO development, 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	TypeC
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

Model Size

Softwares

PlatformIO

T-Lite Firmware

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

For more emissivity/reflectivity data, see: Emissivity Reference Table (PDF)

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:

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

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

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

   // …additional processing…
} 

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

Video

Product Tutorial