M5Stack Modular IoT Hardware & ODM Platform

M5Stack Technology Co., Ltd was founded in 2017 in Shenzhen, China, and was acquired by chipmaker Espressif in 2024 after an investment in 2018. It builds modular IoT hardware around ESP32 microcontrollers in a standard 5 x 5 cm stackable form factor, helping product teams move from a proof of concept to volume production without designing every board from scratch.

The catalogue spans more than 400 SKUs: controller families such as Core, Stick, Atom, Stamp, Cardputer and E-Paper, plus add-on units for sensors, actuators, HMI, audio, cameras, wireless and Ethernet, and an LLM hardware series launched in 2024. Software includes the UiFlow visual programming environment, AiFlow and StackFlow AI, the EzData cloud data service and support for Arduino, ESP-IDF and Home Assistant. Its business model has three stages: standard products with zero NRE, tailored ODM versions of reference designs with certified factory production from one to one million units, and joint development of new platforms and industry solutions for smart factories, agriculture and retail.

• Stackable controllers: ESP32-based Core, Stick, Atom, Stamp, Cardputer and E-Paper families.
• Function units: sensor, actuator, HMI, audio, camera, wireless and Ethernet add-on modules.
• AI hardware: LLM series and StackFlow AI for on-device AI applications.
• UiFlow and EzData: visual programming and cloud data service for rapid application development.
• ODM services: tailored enclosure, PCB layout and firmware with certified production from 1 to 1M units.
• Industry solutions: IoT edge systems for smart factory, smart agriculture and smart retail.

A Vietnamese system integrator can prototype machine-monitoring nodes for a factory with M5Stack controllers and units, then order a customised ODM version for deployment. An agritech company can build greenhouse sensor stations using the smart agriculture reference designs. Universities can use UiFlow and stackable kits in IoT and embedded courses.

Product teams can build a working IoT prototype from off-the-shelf stackable modules and then scale the same reference design to production with zero NRE for standard products. ODM customisation of enclosure, PCB layout or firmware shortens time to a branded product. A large ecosystem, with over 3 million products sold and a community of more than 181,000 developers, reduces integration risk and support effort.

IoT product development is shifting toward modular, pre-certified hardware and low-code tools so that small teams can reach production quickly, while edge AI and on-device LLMs are entering low-cost microcontroller platforms. Vietnamese manufacturers and solution providers building smart factory and agriculture systems can benefit from ESP32-based platforms that are widely taught and supported in the region.

Founded in 2017 and headquartered in Bao'an District, Shenzhen. Espressif invested in 2018 and acquired the company in 2024; the brand continues to operate. Awards include Best Product at CHTF 2022 and a Good Design Award in 2025. It reports 3 million+ products sold in 110+ countries through 50+ distributors, including Cytron in Malaysia and Amicus in Singapore.