Gray

SKU:K002

Description

Gray is an advanced development kit in the M5Stack series. As an upgraded version of the Basic kit, it offers larger Flash memory and integrates the IMU sensor MPU6886+BMM150. Whether for beginners or advanced users, the Gray kit is an excellent choice.

The IMU attitude sensor can be used in many applications to detect data such as acceleration, angle, and trajectory extension. Based on this, you can create related products such as motion data collectors and 3D remote gesture controllers.

With rapid prototyping and a very low threshold, the M5Stack development board is your best choice for IoT development. Traditional development boards can only be used for verification and learning, but the M5Stack board offers more possibilities. It features an industrial-grade case and exquisite design, providing stable performance. Besides verification and learning, it can also accelerate development and productization. It uses the ESP32 IoT chip, integrates a Wi-Fi module, has 4MB of SPI flash, and its dual-core low-power design performs exceptionally in various applications. The hardware expansion system, consisting of over 30 stackable M5Stack modules and over 40 expandable units, can quickly help you build and verify your IoT products.

Tutorial

Supported development platforms and programming languages: Arduino, UIFlow Blockly language, Micropython. No matter your development and programming skill level, M5Stack will assist you in gradually turning your ideas into reality.

If you have developed with ESP8266, you will find that ESP32 is a perfect upgrade. Compared to ESP8266, ESP32 has more GPIOs, more analog inputs, two analog outputs, and multiple peripheral interfaces (such as spare UART). The official development platform ESP-IDF has ported FreeRTOS, which, with dual-core and real-time operating system, allows you to organize your program code more efficiently and optimize program execution efficiency.

UIFlow

This tutorial will introduce you to controlling the Gray device through the UIFlow graphical programming platform

UiFlow2

This tutorial will introduce you to controlling the Gray device through the UiFlow2 graphical programming platform

Arduino IDE

This tutorial will introduce you to programming the Gray device using the Arduino IDE

Features

Based on ESP32 development
Large capacity flash
Integrated 3-axis gyroscope, 3-axis accelerometer, and 3-axis magnetometer
Built-in speaker, buttons, LCD screen, power/reset button
TF card slot (supports up to 16GB)
Built-in lithium battery
Back magnetic design
Expandable pins and interfaces
M5-Bus socket & pins
Development Platform
- UiFlow1
- UiFlow2
- Arduino IDE
- ESP-IDF
- PlatformIO

Includes

1 x Gray
10 x Dupont wires
1 x USB Type-C cable (20cm)
1 x User manual
1 x Sticker

Applications

IoT controllers
STEM education
DIY projects
Smart home devices

Specifications

Main Control Resources	Parameter
SoC	ESP32-D0WDQ6 @ Xtensa® 32-bit LX6 dual-core processor, clock frequency 240MHz
DMIPS	600
SRAM	520KB
Flash	16MB
Wi-Fi	2.4 GHz Wi-Fi
Input Voltage	5V@500mA
Interface	USB Type-C x 1, GROVE (I2C+I/O+UART) x 1
IPS Screen	2 inch, 320x240 Colorful TFT LCD, ILI9342C, Max brightness 853nit
Speaker	1W-0928
Core Base Interface	PIN (G1, G2, G3, G16, G17, G18, G19, G21, G22, G23, G25, G26, G35, G36)
MEMS	MPU6886+BMM150
Buttons	Custom buttons x 3
Battery	110mAh@3.7V
Antenna	2.4G 3D antenna
Operating Temperature	0 ~ 60°C
Case Material	Plastic (PC)
Product Size	54.0 x 54.0 x 17.0mm
Product Weight	47.7g
Package Size	94.8 x 65.4 x 25.3mm
Gross Weight	92.0g

Learn

BMM150 Magnetic Field Interference

Products with magnets may interfere with the BMM150 magnetic field sensor, causing abnormal readings. When used with an M5 master control device containing a magnet, the magnet needs to be removed, and at the same time, the BMM150 sensor should be kept away from strong magnetic fields.

Power On/Off

Power On/Off Operation

Power On: Single click the red power button on the left
Power Off: Quickly double-click the red power button on the left
Note: By default, the device cannot be turned off when powered by USB

Schematics

M5Core Schematics PDF

1/6

PinMap

LCD Screen & TF Card

LCD Pixels: 320 x 240

TF Card supports up to 16GB

ESP32-D0WDQ6	G23	G19	G18	G14	G27	G33	G32	G4
ILI9342C	MOSI/MISO	/	CLK	CS	DC	RST	BL
TF Card	MOSI	MISO	CLK					CS

Buttons & Speaker

ESP32-D0WDQ6	G39	G38	G37	G25
Button Pins	BUTTON A	BUTTON B	BUTTON C
Speaker				Speaker Pin

GROVE Interface A & IP5306

The power management chip (IP5306) is a custom I2C version with an I2C address of 0x75. Click here to view the IP5306 register manual.

ESP32-D0WDQ6	G22	G21	5V	GND
GROVE A	SCL	SDA	5V	GND
IP5306 (0x75)	SCL	SDA	5V	GND

IP5306 Charge/Discharge Voltage Parameters

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%

MPU6886

MPU6886 I2C address 0x68

ESP32-D0WDQ6	G22	G21	5V	GND
MPU6886 (0x68)	SCL	SDA	5V	GND

BMM150

BMM150 I2C address is 0x10

ESP32-D0WDQ6	G22	G21	5V	GND
BMM150 (0x10)	SCL	SDA	5V	GND

Charging Current Measurements

Charging Current	Current After Full Charge (Off)	Full Charge (On)
1.069A	-	0.073A

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

HY2.0-4P

HY2.0-4P	Black	Red	Yellow	White
PORT.A	GND	5V	G21	G22
PORT.B	GND	5V	G26	G36
PORT.C	GND	5V	G17	G16

M5-Bus

FUNC	PIN	LEFT	RIGHT	PIN	FUNC
	GND	1	2	G35	ADC
	GND	3	4	G36	ADC
	GND	5	6	RST	EN
MOSI	G23	7	8	G25	DAC/SPK
MISO	G19	9	10	G26	DAC
SCK	G18	11	12	3V3
RXD0	G3	13	14	G1	TXD0
RXD2	G16	15	16	G17	TXD2
Int SDA	G21	17	18	G22	Int SCL
GPIO	G2	19	20	G5	GPIO
I2S_SK	G12	21	22	G13	I2S_WS
I2S_OUT	G15	23	24	G0	I2S_MK
	HPWR	25	26	G34	I2S_IN
	HPWR	27	28	5V
	HPWR	29	30	BAT

For more information on pin allocation and pin remapping, refer to the ESP32 datasheet

Datasheets

Softwares

Arduino

UiFlow1

Gary UiFlow1 Quick Start

UiFlow2

Gary UiFlow2 Quick Start

USB Driver

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 packages. After extracting the package, select the installation package corresponding to your operating system's bit version for installation. (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 installation, so you can 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

Easyloader

Easyloader	Download Link	Note
Gray Factory Firmware Easyloader	download	/

Video

Product Comparison

To compare information on the controller series products, you can visit the Product Selection Table, check the target products, and get the comparison results. The selection table covers key information such as core parameters and functional features, and supports comparison of multiple products simultaneously.

Version Change

Release Date	Product Changes
2020.3	Battery capacity changed from 150mAh to 110mAh
2019.7	TN screen changed to IPS screen
2019.6	MPU9250 changed to MPU6886+BMM150
2017.12	MPU6050+MAG3110 changed to MPU9250, IP5306 connected to I2C bus
2017.9	First release

Note

Devices with 2018.2A PCB version do not support C2C (Type-C to Type-C) connection or PD power supply.

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