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    Hey, what's up, Guys! Akarsh here from CETech.

    In this tutorial, I'm going to show you how to trigger actions with Bluetooth using M5Stamp PICO and M5Stick C which are very cheap and High efficient ESP32 Controllers.

    Components Required:

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    What are M5Stick and M5Stamp?

    M5Stack is a technology company that designs and manufactures anopen-source development toolkit, including hardware, programming platform, and IoT solutions. It was founded by Jimmy Lai in 2017 and isbased in Shenzhen, China.

    M5Stack created the M5Stick and M5Stamps, which are both based on the ESP32 controller. The M5Stick C features an embedded TFT display and battery, while the M5Stamp has a small footprint and can be used in a variety of IoT products.


    M5StickC is a mini M5Stack, powered by ESP32. It is a portable, easy-to-use, open-source, IoT development board. It is an ESP32 development board with 0.96 inch TFT color screen (80 * 160 resolution), Red LED, button, Microphone, IR transmitter, 6-axis IMU (SH200Q), and 80 mAH battery. The ESP32 module ESP32-Pico in M5StickC also has a built-in 4MB flash. If the M5StickC is equipped with a watch base and watch belt, you can wear it on your wrist.

    It is built in a continually growing hardware and software ecosystem. It has a lot of compatible modules and units, as well as the open-source code & engineering communities that will help you maximize your benefits in every step of the developing process.

    Power switch operation:

    Power on: Press the power button for 2 seconds

    Power off: Press the power button for 6 seconds

    The input range of VBUS_VIN and VBUS_USB is limited to 4.8-5.5V, and the internal battery will be charged through AXP192 power management when VBUS is powered.


    STAMP-PICO features an ultra-compact design with two low-power Xtensa® 32-bit LX6 microprocessors at 240MHz on a PCB as tiny and delicate as a postage stamp. low power consumption. It is ideal for any space-constrained or battery-powered devices such as wearables, medical devices, sensors, and other IoT devices.

    1, MULTIFORM: 5 options of installation, means endless possibilities! (SMT, DIP, flywire, grove interface), with a high-temperature resistant plastic shell, 3D antenna and components can be better protected.

    2, LOW-CODE DEVELOPMENT: STAMP-PICO supports UIFlow graphical programming platform, scripting-free, cloud push; and fully compatible with Arduino, MicroPython, ESP32-IDF, and other mainstream development platforms to quickly build various applications.

    3, HIGH INTEGRATION: STAMP-PICO contains a 5V->3.3V DC/DC port, GPIOx12, programmable RGB light x1, button x1, and finely tuned RF circuit, providing stable and reliable wireless communication.

    4, STRONG EXPANDABILITY: Easy access to M5Stack's hardware and software ecology system: a wealth of sensors, actuators, functional modules, and accessories to choose from, and Extremely fast adaptation.

    Set up M5Stamp and M5Stick with Arduino IDE by following these instructions.



    Flow :

    M5Stick C will act as a BLE transmitter, while M5Stamp PICO will act as a BLE receiver. When Button A on the M5Stick is pressed, the M5Stamp's LED turns green