Core2 is the second generation main unit in the M5Stack development kit series, further enhancing the functionality of the original first-generation main unit with more comprehensive hardware features. The core controller Core2 is equipped with ESP32-D0WDQ6-V3, featuring two independently controllable Xtensa® 32-bit LX6 processors with a main frequency of up to 240 MHz, supporting Wi-Fi functionality. It has onboard 16 MB Flash and 8 MB PSRAM, and programs can be downloaded via the USB Type-C interface. Its powerful configuration meets the resource demands of complex applications. The front is equipped with a 2.0-inch integrated capacitive touch screen, providing users with a smoother human-computer interaction experience.
The body has a built-in vibration motor, providing haptic feedback and vibration alert functions. The built-in RTC module provides precise timing functionality. The power section is equipped with an AXP192 power management chip that effectively controls the power consumption of the body, with a built-in green power indicator light. The body also includes a TF-card (microSD) slot and a speaker. To ensure higher quality sound effects, it uses a power amplifier chip with an I2S digital audio interface, effectively preventing signal distortion. The left side and bottom of the body have independent power and reset (RST) buttons, and the three dots on the front of the screen are part of the touch screen, which can be programmed to map hot zones as three virtual buttons. The back of the body integrates a small expansion board with a 6-axis IMU sensor and a microphone.
This tutorial will introduce you to controlling the M5Core2 device through Arduino IDE programming
Note
Compatibility Issue
The vibration motor that comes with Core2 interferes structurally with the Base series bases. To prevent damage to the device, do not stack Core2 with the Base series functional bases.
Features
Developed based on ESP32, supports WiFi
16M Flash, 8M PSRAM
Built-in speaker, power indicator light, vibration motor, RTC, I2S amplifier, capacitive touch screen, power button, reset button
TF card slot (supports up to 16GB)
Built-in lithium battery with power management chip
Independent small board with built-in 6-axis IMU, PDM microphone
Power button, RST button, screen virtual buttons x 3
Vibration Alert
Vibration motor
IPS LCD Screen
2.0"@320 x 240 ILI9342C
Capacitive Touch IC
FT6336U
Speaker Amplifier
NS4168
Microphone
SPM1423
I2S Amplifier
NS4168
IMU
MPU6886
RTC
BM8563
PMU
AXP192
USB Chip
CP2104/CH9102F (two chip versions, no difference in function or use)
DC-DC Boost
SY7088
TF Card Slot
Supports up to 16G
Lithium Battery
500mAh @ 3.7V
Charging Parameters
Charging current: 0.219A Current after full charge (off): 0.055A Current after full charge (on): 0.147A
Antenna
2.4G 3D antenna
Operating Temperature
0 ~ 60°C
Base Screw Specification
Hex socket flat head M3
Internal PCB Reserved Interface
Battery interface (specification: 1.25mm-2P) USB line interface (specification: 1.25mm-4P)
Product Dimensions
54.0 x 54.0 x 16.5mm
Product Weight
54.9g
Packaging Dimensions
80.0 x 59.9 x 21.6mm
Package Weight
100.8g
Learn
Power On/Off
Power On/Off
Power on: Single click the left power button Power off: Long press the left power button for 6 seconds Reset: Single click the bottom RST button
When stacking M5Core2 with M5 modules, you need to remove the battery bottom of Core2. If you need to retain the I2S microphone, IMU, and battery functions of the base while stacking other modules, it is recommended to use
M5GO Bottom2
. The PCB board of CORE2 reserves the interface for the CP2104 chip and the lithium battery interface.
Some screen edges may have touch non-linearity issues. You can try using
M5Tool
to upgrade the screen firmware to resolve this issue.
Click the link below to download the driver for your operating system. There are currently two driver chip versions, CP210X (for CP2104 version) / CP34X (for CH9102 version) driver package. After extracting the package, select the installation package for your operating system's bit version to install. (If you are unsure which USB chip your device uses, you can install both drivers. CH9102_VCP_SER_MacOS v1.7 may report an error during installation, but it has actually completed the installation, so you can ignore it.) If you encounter issues with downloading programs (such as timeout or "Failed to write to target RAM"), try reinstalling the device driver.
The book
《ESP32 formats and communication protocols》
introduces the M5Stack Core2 module in several chapters. The M5Stack Core2 module integrates a touch LCD screen, Bluetooth and Wi-Fi communication, a microphone and speaker, as well as an accelerometer and gyroscope, making the M5Stack Core2 module very versatile. The book uses communication protocols to build projects, from connecting a smartwatch to a phone (BLE) to remote communication with satellites orbiting above the earth (LoRa) and audio signal transmission between devices (I2S). QR codes are used to control external devices via the internet, while ESP-MESH and ESP-NOW protocols enable communication between microcontrollers without an internet connection.
Video
Version Change
Release Date
Product Changes
Remarks:
2020.6
First release
/
2021.7
CP2104 replaced with CH9102F
Actual shipments have two chip versions, CP2104/CH9102F, with no difference in function or use
