pdf-icon

CONTENTS

GRAY

SKU:K002

Tutorial

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

Description

This product is EOL, please consider the upgraded M5Stack Fire v2.6 as an alternative product.

M5Stack GRAY Kit is one of the M5Stack development kit series, which is a upgrade from the Basic kits. In comparison, Gray kit provides an extra IMU sensor, BMM150 + MPU6886. Gray kit is a nice choice for users who just get started or in progress.

With a IMU posture sensor, there are a lot of situations which u can apply this kit to: detecting acceleration, angulation, and trajectory. You can make relative products like sports data collector, 3D remote gesture controller and more base on the above functions.

GRAY is M5 Core device. Its modular, stackable, scalable, and portable device is powered with an ESP-32 core, which makes it open source, low cost, full-function, and easy for developers to handle new product development on all stages include circuit design, PCB design, software, mold design and production.

If you want to explore the fastest way of IoT prototyping, M5Stack development board is the perfect solution. Not like others, M5Stack development board is highly efficient, covered with industrial grade case and ESP32-based development board. It integrates with Wi-Fi modules and contains a dual-core and 16MB of SPI Flash . Together with 30+ M5Stack stackable modules , 40+ extendable units and different levels of program language, you can create and verify your IoT product in a very short time.

Supportive development platforms and programming languages: Arduino, Blockly language with UIFlow , Micropython. Regardless of what level programming skill you have, M5Stack would guide you in every step of the way to realize your idea as well as to the final productization.

If you ever played with ESP8266, you would realize that ESP32 is a perfect upgrade out of ESP8266. In comparison, ESP32 has more GPIOs, more analog inputs and two analog outputs, multiple extra peripherals( like a spare UART ). Official developing platform ESP-IDF has transplanted with FreeRTOS. With dual-core and real time OS you can get more organized code and much high speed processor.

Power on/off:
Power on: click the red power button on the left
Power off: Quickly double-click the red power button on the left
Note: By default, when USB is powered, it cannot be shut down**

Product Features

  • ESP32-based
  • Built-in Speaker, Buttons, LCD
  • TF card slot (Up to 16GB support)
  • Battery Socket & Lithium Polymer Battery
  • Extendable Pins & Holes
  • M-Bus Socket & Pins
  • Compatible with multi-platform development:

Include

  • 1x Gray
  • 10x Female-male Dupont
  • 1x Type-C USB(20cm)
  • 1x User Manual
  • 1x Sticker

Applications

  • Internet of things terminal controller
  • Stem education product
  • DIY creation

Specification

Resources Parameter
ESP32 240MHz dual core, 600 DMIPS, 520KB SRAM, Wi-Fi
Flash Memory 16MB (old: 4MB)
Power Input 5V @ 500mA
Port TypeC x 1, GROVE(I2C+I/0+UART) x 1
IPS Screen 2 inch, 320x240 Colorful TFT LCD, ILI9342C, max brightness 853nit
Speaker 1W-0928
Button Custom button x 3
Core Bottom Port PIN (G1,G2,G3,G16, G17, G18, G19, G21, G22, G23, G25, G26, G35, G36)
MEMS BMM150 + MPU6886
Battery 110mAh @ 3.7V
Antenna 2.4G 3D Antenna
Operating Temperature 0°C to 60°C
Net weight 49.2g
Gross weight 93g
Product Size 54 x 54 x 18.9 mm
Package Size 95 x 65 x 25mm
Case Material Plastic ( PC )

USB Driver

Click the link below to download the driver that matches the operating system. There are currently two driver chip versions (CP210X/CH9102). Please download the corresponding driver compressed package according to the version you are using. After decompressing the compressed package, select the installation package corresponding to the number of operating systems to install. (If you are not sure of the USB chip used by your device, you can install both drivers at the same time. During the installation process of CH9102_VCP_SER_MacOS v1.7, an error may occur, but the installation is actually completed, just ignore it.)
Driver name Applicable driver chip Download link
CP210x_VCP_Windows CP2104 Download
CP210x_VCP_MacOS CP2104 Download
CP210x_VCP_Linux CP2104 Download
CH9102_VCP_SER_Windows CH9102 Download
CH9102_VCP_SER_MacOS v1.7 CH9102 Download
Port Selection on MacOS
On MacOS, there may be two available ports. When using them, please select the port named wchmodem.

EasyLoader

EasyLoader is a concise and fast program writer, which has a built-in case program related to the product. It can be burned to the main control by simple steps to perform a series of function verification.

Download Windows Version Easyloader Download MacOS Version Easyloader

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

Peripherals Pin Map

LCD & TF card

LCD :320x240 TF card Maximum size 16GB

ESP32 Chip GPIO23 GPIO19 GPIO18 GPIO14 GPIO27 GPIO33 GPIO32 GPIO4
ILI9342C MOSI/MISO / CLK CS DC RST BL
TF Card MOSI MISO CLK CS

Button & Speaker

ESP32 Chip GPIO39 GPIO38 GPIO37 GPIO25
Button Pin BUTTON A BUTTON B BUTTON C
Speaker Speaker Pin

GROVE Port A & IP5306

We've use the customized I2C version of IP5306, on power management.

Its I2C address is 0x75. Click here to check its datasheet

ESP32 Chip GPIO22 GPIO21 5V GND
GROVE A SCL SDA 5V GND
IP5306 SCL SDA 5V GND

IP5306 charging/discharging,Voltage parameter

charging discharging
0.00 ~ 3.40V -> 0% 4.20 ~ 4.07V -> 100%
3.40 ~ 3.61V -> 25% 4.07 ~ 3.81V -> 75%
3.61 ~ 3.88V -> 50% 3.81 ~ 3.55V -> 50%
3.88 ~ 4.12V -> 75% 3.55 ~ 3.33V -> 25%
4.12 ~ / -> 100% 3.33 ~ 0.00V -> 0%

6-Axis MotionTracking Sensor MPU6886

MPU6886 I2C address 0x68

ESP32 Chip GPIO22 GPIO21 5V GND
MPU6886 SCL SDA 5V GND

3-Axis Geomagnetic Sensor BMM150

BMM150 I2C address 0x10

ESP32 Chip GPIO22 GPIO21 5V GND
BMM150 SCL SDA 5V GND

M5PORT DEFINE

PORT PIN Note:
PORT-A(Red) G21/22 I2C
PORT-B(Black) G26/36 DAC/ADC
PORT-C(Blue) G16/17 UART

ESP32 ADC/DAC

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

Charging current measured value

charging current Fully charged current(Power OFF) Fully charged current(Power ON）
1.069A - 0.073A

M-BUS

M_BUS

For more information about Pin assignment and Pin Remapping, Please refer to ESP32 Datasheet

M-BUS BUS(compared to M5Core2)

Schematic

Example

Arduino IDE

  • Click here to download Arduino code

Video

m5stack introduce

Version Change

Release Date Product Change
2017.9 Initial public release
2017.12 MPU6050+MAG3110 is changed to MPU9250, IP5306 is connected to I2C bus
2019.6 MPU9250 changed to MPU6886+BMM150
2019.7 TN screen changed to IPS screen
2020.3 Battery capacity changed from 150mAh to 110mAh /
Note: 2018.2A PCB version of the device does not support C2C (TypeC to TypeC) connection and PD power supply.