GRAY
Tutorial
Description
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: 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
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 |
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.
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
For more information about Pin assignment and Pin Remapping, Please refer to ESP32 Datasheet
M-BUS BUS(compared to M5Core2)
Schematic
Related Link
Learn
Example
ArduinoIDE
- 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 | / |
2018.2A PCB version of the device does not support C2C (TypeC to TypeC) connection and PD power supply.