EasyLoader (beta)

Current Product Don't Have Test Firmware

Note: pls, use PC chrome/edge browser, if can't connect, refresh the webpage.

1. Click connect button

2. After connected successfully, pick a firmware

3. Click the burn button

4. After burning successfully, Unplug the device and restart.


Unit Camera DIY KIT


UIFlow Camera-Tool


UNIT CAMERA DIY KIT is a powerful DIY ESP32 Wi-Fi camera kit, which includes two lens modules: Wide-angle fisheye + regular view, both using OV2640 image sensor supporting up to 2M pixel output. DIY case design, You will get a DIY model for so much fun right out of the box! Compact size, high resolution and focus capabilities they are, It's excellent for a variety of IoT image capture applications.

  • High flexibility.

    • Lens focus support
    • GROVE expansion interface with programmable RGB lights
  • Plug-and-play.

    • Self image transfer firmware with UART/WIFI image transfer support
    • Integrated image parameter API interface (white balance, exposure, gain, size, etc.)
    • PC-based debugging tools
    • Support UIFlow graphical programming platform for one-click invocation and cloud transmission
    • Works with Arduino, ESP32-IDF and other mainstream development platforms

Product Features

  • Plug-and-play
  • Rich image processing API interface
  • Fascinating DIY structure model cover
  • Built-in ESP32 MCU


  • 1x Unit CAM core board
  • 1x OV2640 camera (FOV:66.5°)
  • 1x OV2640 camera (FOV:160°)
  • 1x Model Housing Kit
  • 1x Camera Back Clip (LEGO compatible)
  • 1x HY2.0-4P Cable


  • Remote Monitoring
  • Camera Timer


Specifications Parameters
ESP32-WROOM-32E 240MHz Dual Core, 600DMIPS, 520KB SRAM, Wi-Fi
Flash 4MB
Wide Angle Fisheye Lens Focal length 1.0±5%mm
Aperture 2.2±5%
Lens type 1/4inch
Field of view 160°
Pixels 2M
Reverberation -135%
Sensitive chip OV2640
Conventional view lens Focal length 4.8±5%mm
Aperture 2.4±5%
Lens type 1/4inch
Field of view 65°
Pixels 2M
Reverberation <1%
Sensor chip OV2640
Firmware default communication method UART: 115200bps 8N1
Sensor output format support YUV(422/420)/YCbCr422,8-bit compressed data,RGB565/555,8-/10-bit raw RGB data
Net Weight 21.8g
Gross Weight 49.1g
Model board 11 * 66 * 181mm
Fisheye camera assembly size 40 * 24 * 17.2mm
Assembly size for normal camera 40 * 24 * 11m
Package Size 25 * 73 * 220mm

Flash Burning Download

Unit CAM does not include a program download circuit. When the user needs to download the ESP32 update program, the program can be burned through an external connection with a USB-TTL downloader. Click here to buy ESP32 download board

Pin Mapping

OV2640 Interface

interface camera pins unit CAM
System Clock XCLK IO27
Vertical Sync VSYNC IO22
Horizontal Reference HREF IO26
Pixel Clock PCLK IO21
Pixel Data Bit 0 D0 IO32
Pixel Data Bit 1 D1 IO35
Pixel Data Bit 2 D2 IO34
Pixel Data Bit 3 D3 IO5
Pixel Data Bit 4 D4 IO39
Pixel Data Bit 5 D5 IO18
Pixel Data Bit 6 D6 IO36
Pixel Data Bit 7 D7 IO19
Camera Reset RESET IO15
Camera Power Down PWDN -1
Power Supply 3.3V 3V3 3V3
Ground GND GND

HY2.0-4P Interface.

HY2.0-4P Unit CAM
5V 5V

LED (Blue)

D1 IO4







  • Unpacking and manual assembly


Q1: How do I remove the speaker floor noise when the M5Core is on or running?

Execute the following statement in Setup() of the Arduino program

Q2: How does M5Core2 stack modules?

When M5Core2 is stacked with other M5 modules, you need to remove the battery base of Core2, which does not support module stacking.

Q3: A timeout error is displayed when uploading the program to the device

Reason and solution: The power supply current of the port is insufficient, which can cause the device to not enter the download mode normally. You can try to connect a capacitor (>0.1uF) between the RST pin and the GND pin, or when uploading the program, set the G0 Short-circuit to GND, so that G0 can be set to a low level state normally

Q4: How to solve the phenomenon of automatic signal triggering of M5Core button A

Add the header file #include <driver/adc.h> and the function adc_power_acquire(); in the Arduino program

Q5: M5 device battery life

The battery life of the controller is affected by various factors such as battery capacity, operating status, and load, so there is no fixed value. Reducing the load and adopting a sleep strategy can effectively increase the battery life.

Q6: Can multiple modules with batteries be stacked at the same time?

Support multiple stacks, the total capacity of the batteries in parallel increases, and the voltage remains unchanged. However, since the discharge of each battery is not balanced during use, there is a voltage difference between the batteries, which may cause the battery to charge backwards. .(will lose part of the battery capacity)

Q7: M5 master supports WiFi connection to 5G frequency band

ESP32 module currently does not support WiFi in 5G band, only 2.4G.

Q8: The RS485 device cannot communicate normally/data is garbled. Packet loss, etc.

Confirm whether the TX/RX pin on the TTL side of the pin is correct, try to add two 120Ω terminal resistors at the beginning and end of the device line to reduce signal reflection interference

Q9: The difference between different masters and camera products

Click the link below to view the product comparison table

Q10: M5 camera image blur, how to adjust the focal length

Rotate the lens to adjust the focal length within a certain range

Q1: How to read the programmed firmware?

Use esptool to read the flash content of esp32 and export the bin file. Refer to the detailed operation

Q2: Several solutions for esp32 board download failure in Arduino IDE board management

Restart the Arduino IDE, the computer uses the mobile AP mobile network to download.

Method 3: Download the resource package provided by M5Stack for direct installation, and extract the contents to the board management path of Arduino, such as (C:\Users\Sean\AppData\Local\Arduino15\packages), https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/arduino/packages/m5stack_v2.0.0.zip
Q3: Arduino SPIFFS file upload operation

Refer to the Github link below, use arduino-esp32fs-plugin for file upload

Q4: When M5Burner burns firmware, an error pop-up window or exception occurs

Check if the COM of the corresponding device is selected and if the M5Burner is the latest version

Q5: Does the M5 master device support multi-language display (Chinese, English, Japanese, Russian, etc.)?

UIFlow users can switch the Label font to Unicode, Arduino users can use the Chinese font library provided in the M5GFX driver library

Q6: The program cannot load the SD card normally

Confirm whether the SD card format is FAT32, and no partitions exist.

Q7: How to use Bluetooth, HTTP, SD, WebServer, FreeRTOS and other features in Arduino IDE

You can refer to the following link for other ESP32 users to share the case program

Q8: How to download programs for STAMP C3U

STAMP C3U enters program download mode operation: 1. Long press the center button (G9) of STAMP C3U when the power is off. 2. Connect to the computer, after the port is successfully identified, program burning.

Q9: How STAMP C3U defines UART0 output mode

By default, USB CDC is not enabled, the serial port output started by C3U will be output through the default pins (G20, G21) of UART0. If you want to output through USB, please use the IDE to output Its USB CDC option is enabled. (Arduino users can enable it through Tools->USB CDC on Boot-Enabled. For IDF users, please refer to the ESP IDF official documentation.)

Q10: Unable to connect to UIFlow Desktop IDE

Refer to the UIFlow documentation of the corresponding device to check whether the device has entered the USB programming mode.


Q1: Consultation for after-sales problems of products

Describe the problems encountered in detail. Screenshots of the programs involved or files can be added as attachments and sent to M5Stack's official after-sales email

Q2: Code Resources, Cases, User Communication