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CONTENTS

Core2 v1.1

SKU:K010-V11

Description

Core2 V1.1 is an iterative version of Core, with upgraded power IC and a continuation of the classic design of Core2. It is a powerful and user-friendly development board. Core2 V1.1 is equipped with ESP32-D0WDQ6-V3, featuring two independent Xtensa® 32-bit LX6 processors with a clock frequency of up to 240MHz. It supports WiFi functionality and has onboard 16MB Flash and 8MB PSRAM, and supports program downloading via the TYPE-C interface. Its strong configuration can meet the requirements of complex applications.

Core2 V1.1 is equipped with a 2.0-inch integrated capacitive touch screen. The three dots on the front of the screen are part of the touch screen. Users can set the hot zone mapping as three virtual buttons through programming, enabling diverse human-machine interaction experiences. Additionally, Core2 V1.1 has a built-in vibration motor for haptic feedback and vibration alert functionality.

Core2 V1.1 has an integrated RTC module and a dedicated battery for RTC power supply, providing accurate timing functionality. Furthermore, the AXP2101 power management chip effectively controls the power consumption of the device. Core2 V1.1 also has a built-in blue power indicator light, which can be used to implement specific functions or status indications according to the user's application needs. Core2 V1.1 is also equipped with a MicroSD card slot, speaker, and a high-quality I2S digital audio interface power amplifier chip. The expansion board on the back of the device integrates a 6-axis IMU sensor and a microphone, providing additional functionality and possibilities.

The differences between Core2 and Core2 v1.1 are as follows:
1.The power management scheme is iterated from Core2(AXP192) to Core2 v1.1(AXP2101+INA3221). The ID of AXP192 and AXP2101 is different, and the program uses this as a sign to distinguish the versions;
2.The power indicator is changed from green to blue;
3.Add RTC chip power supply battery to ensure accurate timing when power is off.

Power Management

Operations:
Power on: One click the power button on the left
Power off: Long press the left power button for 4 seconds
Reset: Click the RST button on the bottom side

USB drive

Before using, please go to download page to download the USB driver that matches your operating system, and install it.
Note: Core2 currently has two CH9102F A USB chip version, users can install the drivers (CH9102) that are compatible with two ICs at the same time to ensure that the device drivers work normally.

Extensions

To stack Core2 V1.1 with M5 modules, you need to remove/eliminate the battery bottom of Core2 V1.1; If you wish to keep I2S Mic, IMU and Battery functions, a M5GO Bottom2 is required.
The vibration sensor of Core2 V1.1 and M5 Base series are incompatible in mechanical design. Please do not stack them together.
Some of the screen edges will have touch non-linearity problem, you can try to use M5Tool to upgrade the screen firmware to solve this problem.
This product contains batteries that are non-replaceable.

Tutorial

UIFlow UIFlow
UIFlow
This tutorial will show you how to control Core2 v1.1 devices through the UIFlow graphical programming platform
UIFlow2.0 UIFlow2.0
UIFlow2.0
This tutorial will show you how to control the Core2 v1.1 device through the UIFlow2.0 graphical programming platform
Arduino IDE Arduino IDE
Arduino IDE
This tutorial will show you how to program and control Core2 v1.1 devices through Arduino IDE
Micropython Micropython
Micropython
This tutorial will show you how to control Core2 v1.1 devices through Micropython programming

Features

  • ESP32-based, built-in Wi-Fi
  • 16M Flash,8M PSRAM
  • Built-in speaker, power indicator, vibration motor, RTC, I2S amplifier, capacitive touch screen, power button, reset button
  • TF card slot (16G Maximum size)
  • Built-in lithium battery, equipped with power management chip
  • Independent small board built-in 6-axis IMU, PDM microphone
  • M-Bus Socket & Pins
  • Compatible with multi-platform development:
    • UIFlow
    • MicroPython
    • Arduino
    • .NET nanoFramework
    • Operating System (RTOS):zephyr

Includes

  • 1x Core2 V1.1
  • 1x Type-C USB(20cm)
  • 1x HEX KEY

Applications

  • Internet of things terminal controller
  • Stem education product
  • DIY creation
  • Smart home equipment

Specification

Resources Parameters
ESP32-D0WDQ6-V3 240MHz dual core, 600 DMIPS, 520KB SRAM, Wi-Fi
Flash 16MB
PSRAM 8MB
Input Voltage 5V @ 500mA
Interface TypeC x 1, GROVE(I2C+I/0+UART) x 1
IPS LCD Screen 2.0"@320*240 ILI9342C
Touch Screen FT6336U
Speaker 1W(SIZE:0928)
LED Blue power indicator light
Button Power button, RST button, Virtual screen button*3
Vibration reminder Vibration motor
MIC SPM1423
I2S Power Amplifier NS4168
6-axis IMU MPU6886
RTC BM8563
PMU AXP2101
Current Meter INA3221
USB Chip CH9102F
DC-DC Boost SY7088
TF card slot 16G Max
Lithium Battery 500mAh @ 3.7V
Antenna 2.4G 3D antenna
Operating temperature 0°C to 60°C
Base screw specifications Hexagon socket countersunk head M3
Internal PCB board reserved interface Battery interface (specification: 1.25mm-2P)
USB line interface (specification: 1.25mm-4P)
Case Material Plastic ( PC )
Product Size 54 x 54 x 16.5mm
Package Size 75 x 60 x 20mm
Product Weight 54.8g
Package Weight 83.9g

Schematic

schematics

EasyLoader

PinMap

LCD & TF card(LCD :320x240 TF card Maximum size 16GB)

ESP32 Chip GPIO38 GPIO23 GPIO18 GPIO5 GPIO15
AXP2101 Chip AXP_ALDO2 AXP_BLDO1 AXP_ALDO4
ILI9342C MISO MOSI SCK CS DC RST BL PWR
ESP32 Chip GPIO38 GPIO23 GPIO18 GPIO4
TF Card MISO MOSI SCK CS

CAP.TOUCH (I2C Addr: 0x38)

ESP32 chip GPIO21 GPIO22 GPIO39
AXP2101 AXP_ALDO2
FT6336U SDA SCL INT RST

Mic & NS4168(Speaker)

ESP32 Chip GPIO12 GPIO0 GPIO2 AXP_ALDO3 GPIO34
NS4168 BCLK LRCK DATA SPK_EN
Mic CLK DATA

AXP Power Indicator Light

AXP2101 VRTC DLDO1
Bule LED Vcc
Vibration motor Vcc

RTC

ESP32 Chip GPIO21 GPIO22
AXP2101 AXP_IRQ
BM8563 SDA SCL INT

IMU(3-axis gyroscope & 3-axis accelerometer)

ESP32 Chip GPIO21 GPIO22
MPU6886 SDA SCL

USB to serial chip

ESP32 Chip GPIO1 GPIO3
CH9102F RXD TXD

Internal I2C connection

ESP32 Chip GPIO21 GPIO22
MPU6886 SDA SCL
AXP2101 SDA SCL
BM8563 SDA SCL
FT6336U SDA SCL
INA3221 SDA SCL

M5PORT DEFINE

PORT PIN NOTE:
PORT-A(Red) G32/33 I2C
PORT-B(Black) G26/36 DAC/ADC
PORT-C(Bule) G13/14 UART

ESP32 ADC/DAC(For more information about Pin assignment and Pin Remapping, Please refer to ESP32 Datasheet )

ADC1 ADC2 DAC1 DAC2
8 Channels 10 Channels 2 Channels 2 Channels
G32-39 G0/2/4/12-15/25-27 G25 G26

Core2 v1.1 M-BUS Schematic diagram

Core2 v1.1 BUS(compared to M5Stack)

Module Size

module size

Examples

Arduino

Video

  • This case will perform hardware running tests for speakers, wifi, buttons, accelerometer, TF-card(microSD), screen, etc.

Version Change

Release Date Product Changes Notes
/ First ReleaseCore2 /
2023.11 Core2 v1.1 Change PMU power management chip to AXP2101+INA3221/ Add RTC power battery/The power indicator changes to blue

Comparison of AXP2101(Core2 v1.1) and AXP192(Core2) parameters

FAQ

Q: If the memory card fails to read, you can add the following code in the initialization to increase the host memory card reading ability.

A:

for (auto gpio : (const uint8_t[]){18, 19, 23}) {
    *(volatile uint32_t*)(GPIO_PIN_MUX_REG[gpio]) |= FUN_DRV_M;
    gpio_pulldown_dis((gpio_num_t)gpio);
    gpio_pullup_en((gpio_num_t)gpio);
  }