M5Stack PowerHub ESP32 S3 IoT Development Kit for Energy Management

The M5Stack PowerHub is a programmable controller for multi-channel energy management in industrial and IoT systems. The device is based on the ESP32-S3-WROOM-1U-N16R8 module with a dual-core Xtensa LX7 processor at up to 240 MHz, integrated 2.4 GHz Wi-Fi, 16 MB flash, and 8 MB PSRAM. A STM32G031G8U6 coprocessor works together with multiple INA226 voltage and current measurement ICs and electronic switches for precise power monitoring and low-power wake-up functions. The USB Type-C port supports firmware download and USB OTG. An internal USB switch routes the bottom USB port optionally to the front USB Type-A or USB Type-C port. The device supports various power supply options such as DC input (9-20V), 2S lithium batteries (NP-F550/750/950), and backfeeding via PWR485 or PWR CAN. Communication interfaces include RS485 and CAN bus with switchable 120Ω termination resistors as well as two Grove ports. Eight WS2812 RGB LEDs and three buttons enable status display and operation.

Features:

• ESP32-S3-WROOM-1U-N16R8 with dual-core Xtensa LX7 at 240 MHz and integrated Wi-Fi
• STM32G031G8U6 coprocessor with INA226 ICs for precise voltage and current monitoring
• Flexible power supply via DC input, 2S batteries, or backfeeding via RS485/CAN
• RS485 and CAN bus interfaces with switchable 120Ω termination resistors
• USB Type-A and Type-C ports for flexible peripheral connectivity
• Magnetic mounting, DIN rail mounting, and terminal block compatible holes

Application Examples:

• Industrial automation controls with power monitoring
• Smart home hubs with multi-channel energy measurement
• Battery-powered IoT gateways with low-power management
• Vehicle and mobile applications with CAN bus connectivity
• Distributed sensor networks with RS485 communication

Documentation:

• M5Stack Wiki
• Official M5Stack Forum

Technical Specifications:

• Manufacturer: M5Stack
• Manufacturer SKU: K148
• SoC: ESP32-S3-WROOM-1U-N16R8
• Processor: Dual-core Xtensa LX7, up to 240 MHz
• Coprocessor: STM32G031G8U6
• Flash: 16 MB
• PSRAM: 8 MB
• Wireless: Wi-Fi 2.4 GHz
• Energy measurement ICs: INA226 (multiple)
• Expansion ports: 2× HY2.0-4P Grove, 1× EXT 2.54-16P
• RS485 interface: VH3.96-4P, 120Ω termination switchable, backfeeding DC 9~20V
• CAN interface: XT30 (2+2), 120Ω termination switchable, backfeeding DC 9~20V
• USB interfaces: 1× USB Type-A, 2× USB Type-C
• RGB LEDs: 8× WS2812
• Buttons: 3×
• Antenna: SMA, 15×14 mm, 2.4 GHz, 2 dB gain
• Battery compatibility: NP-F550/750/950, Lithium 2S 7.4V
• DC input: 9~20V, 5.5×2.1 mm, positive pole inside
• Operating temperature: 0 ~ 40°C
• Product dimensions: 88 × 56 × 38.5 mm
• Product weight: 174.8 g
• Package dimensions: 109 × 77 × 43 mm
• Gross weight: 213 g

Included in Delivery:

• 1× M5Stack PowerHub Controller
• 1× NP-F550 2000mAh Lithium Battery