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 & Bluetooth 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 productlization.
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
|ESP32||240MHz dual core, 600 DMIPS, 520KB SRAM, Wi-Fi, dual mode Bluetooth|
|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|
|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||32°F to 104°F ( 0°C to 40°C )|
|Product Size||54 x 54 x 18.9 mm|
|Package Size||95 x 65 x 25mm|
|Case Material||Plastic ( PC )|
I have been happy with the M5Stack Core Grey so far. I think the design, details and functionality are excellent. I only gave it a 4/5 star because I have had some issues getting the GPS unit to work and finding the documentation or examples that work has been hard. The preloaded examples and the ones on the site(which are the same) don't seem to recognize the sensor. Some of the references I have found online for things like Power.getBatteryLevel() aren't actually in the M5Stack.h. I am using it purely with Arduino so far as I have more experience with that over Python or UIFlow. Since Purchase I have shown it to a few people who also purchased them. Keep making these great development products, but I would love some more help/guidance troubleshooting. I have recently joined the forum and hope to get some help there.
I would certainly buy again!
ESP32 GREY Development Kit with 9-Axis Sensor
All is well!
This entire eco system is very complete and well built out. You can get started very quickly with the Flow environment and switch to Arduino or Micropython at any time. There really are no limits or proprietary anything.