PowerHub
SKU:C148/K148
Description
PowerHub is a programmable controller integrating multi-channel power management. It adopts the ESP32-S3-WROOM-1U-N16R8 main control module equipped with a dual-core Xtensa LX7 processor (up to 240MHz), supporting 2.4 GHz Wi-Fi, with 16MB Flash and 8MB PSRAM onboard. A built-in STM32G031G8U6 coprocessor, combined with multiple INA226 voltage/current detection ICs and electronic switch design, enables precise management of power states for multiple expansion interfaces, achieving accurate power consumption control and providing low-power wake-up functionality for the whole device. The USB Type-C port can be used for program download and USB OTG functions. Inside, a USB interface switch allows the bottom USB port to be switched to the front USB Type-A or USB Type-C interface for convenient expansion of USB peripherals. The device features an efficient power management system, supporting multiple power supply modes (DC power + 2S battery power + PWR485/PWR CAN input power). It is equipped with 2x HY2.0-4P Grove ports, RS485, and CAN communication interfaces, facilitating connections to various sensors and industrial control devices. Suitable for industrial automation control, smart home, and other scenarios, it provides developers with stable and reliable IoT solutions.
Tutorial
This tutorial explains how to program and control PowerHub using Arduino IDE.
This tutorial introduces the usage of PowerHub's factory firmware, including button operations, controlling interface on/off through the EZData app or web page, and methods for monitoring voltage and current data.
Features
- ESP32-S3-WROOM-1U-N16R8 main control core
- Supports low-power timed wake-up
- USB Type-A / USB Type-C expansion interfaces
- 2 x HY2.0-4P expansion ports
- 2.54-16P expansion bus interface
- RS485 communication interface (with built-in 120Ω terminal resistor switch)
- CAN bus communication interface (with built-in 120Ω terminal resistor switch)
- 2.4 GHz SMA mini antenna
- Multiple power supply modes:
- PWR485/PWR CAN input power
- 2S battery power supply
- DC 7 ~ 20V power supply
- Human-machine interaction:
- Multi-channel status indicator lights
- 3 x physical buttons
- Multiple mounting methods:
- Magnetic design for mounting on metal surfaces
- Rear cross mounting holes for wall installation
- Lego mounting holes
- M2 screw holes
Includes
Product Note
The PowerHub Kit is an integrated set equipped with a removable NP-F550 lithium battery, while the standard PowerHub does not include a battery and requires an external power source or separate battery purchase.
PowerHub
- 1 x PowerHub
PowerHub Kit
- 1 x PowerHub
- 1 x NP‑F550 2000mAh removable battery
Applications
- Industrial automation
- Smart home
Specifications
| Specification | Parameter |
|---|---|
| SoC | ESP32-S3-WROOM-1U-N16R8@Dual-core Xtensa LX7 processor, up to 240MHz |
| MCU | STM32G031G8U6 |
| Flash | 16MB |
| PSRAM | 8MB |
| Wi-Fi | 2.4 GHz Wi-Fi |
| RTC | RTC Chip: RX8130CE, RTC supercapacitor specification: 70000μF/3.3V, size Φ4.8×1.4mm |
| Expansion Ports | 2 x HY2.0-4P + EXT 2.54-16P |
| RS485 Port | Spec: VH3.96-4P, with 120Ω terminal resistor switch Reverse power input voltage: DC 9 ~ 20V |
| CAN Port | Spec: XT30 (2+2), with 120Ω terminal resistor switch Reverse power input voltage: DC 9 ~ 20V |
| USB Ports | 1 x USB Type-A, 2 x USB Type-C |
| RGB LED | 8 x WS2812 |
| Antenna Spec | Size 15 x 14mm, SMA (female thread, female core) connector, 2.4 GHz band, 2dB gain, VSWR ≤1.8 |
| Compatible Battery | NP-F550/750/950, 2S lithium battery @ 7.4V |
| DC Power Input | Voltage: DC 9 ~ 20V, spec: 5.5 x 2.1mm, polarity: inner positive, outer negative |
| Operating Temp. | 0 ~ 40°C |
| Product Size | 88.0 x 56.0 x 38.5mm |
| Product Weight | PowerHub: 71.0g PowerHub Kit (with battery): 174.8g |
| Package Size | 110.0 x 73.0 x 42.0mm |
| Gross Weight | PowerHub: 105.5g PowerHub Kit (with battery): 208.2g |
Interface Output Capability
| Power Supply Method | Output Method | Output Capability |
|---|---|---|
| USB Power Supply (No Battery, No DC) | PORT.A (Red) | 200mA@4.77V |
| PORT.C (Blue) | 300mA@4.74V | |
| USB Type-A | 400mA@4.70V | |
| USB Type-C | 300mA@4.74V | |
| EXT 2.54-16P 5V | 400mA@4.72V | |
| RS485 | 410mA@11.72V | |
| CAN | 410mA@11.71V | |
| DC Power Jack Supply (Ext.PORT Power) | PORT.A (Red) | 500mA@4.70V |
| PORT.C (Blue) | 600mA@4.74V | |
| USB Type-A | 700mA@4.71V | |
| USB Type-C | 600mA@4.71V | |
| EXT 2.54-16P 5V | 800mA@4.72V | |
| RS485 | 1700mA@11.57V | |
| CAN | 1700mA@11.57V | |
| 2S Battery Power Supply | PORT.A (Red) | 1100mA@4.72V |
| PORT.C (Blue) | 1300mA@4.81V | |
| USB Type-A | 1300mA@4.92V | |
| USB Type-C | 1300mA@4.82V | |
| EXT 2.54-16P 5V | 1300mA@5.02V | |
| RS485 | 1400mA@11.59V | |
| CAN | 1400mA@11.56V | |
| RS485 / CAN Power Input | PORT.A (Red) | 390mA@4.70V |
| PORT.C (Blue) | 570mA@4.70V | |
| USB Type-A | 600mA@4.70V | |
| USB Type-C | 520mA@4.70V | |
| Ext.PORT_5VOUT | 700mA@4.70V |
Learn
Download Mode
Connect the device to the computer using a USB-C data cable, press and hold the side BtnPWR button for 3 seconds until the indicator light next to the black antenna flashes blue multiple times. At this point, the device enters download mode.
Charging Instructions
Charging Instructions
When the battery is over-discharged and its voltage drops below 6V, it enters protection mode. Before recharging, remove the battery, reset the device, reinstall it, and then charge via the device’s USB Type-C port.
During the initial charging phase, since the battery is still in protection mode, the charging chip trickle-charges with a small current. This state lasts several minutes, depending on the battery voltage level. Once the voltage rises above 6V, the chip automatically switches to normal charging mode.
During the initial charging phase, since the battery is still in protection mode, the charging chip trickle-charges with a small current. This state lasts several minutes, depending on the battery voltage level. Once the voltage rises above 6V, the chip automatically switches to normal charging mode.
Schematics
1/4
PinMap
RS485 & CAN
| ESP32-S3 | G8 | G18 | G17 | G39 | G40 |
|---|---|---|---|---|---|
| RS485 | MCU_485_TXD | MCU_485_DIR | MCU_485_RXD | ||
| CAN | MCU_CAN_TXD | MCU_CAN_RXD |
| ESP32-S3 | G11 |
|---|---|
| User Button | USR_SW2 (Yellow round button) |
| ESP32-S3 | G19 | G20 |
|---|---|---|
| USB | MCU_USB_DM | MCU_USB_DP |
STM32G031
| ESP32-S3 | G45 | G48 | G0 |
|---|---|---|---|
| STM32G031 | SYS_SDA | SYS_CL | G0_BOOT |
RGB LED & PMU Button
| STM32G031 | PA7 | PB4 | PA4 | PA2 |
|---|---|---|---|---|
| WS2812C | LED_DATA | LED_EN | PMU_SW2 (side button) | PMU_SW1 (top translucent button) |
USB
| STM32G031 | PB3 | PA15 |
|---|---|---|
| USB_SWITCH_L1 | USB_CON_LV1 | |
| USB_SWITCH_L2 | USB_CON_LV2 |
PowerHub’s USB interface adopts a two-level switch design:
- ESP32-S3 is directly connected to the bottom USB Type-C port of the device.
- USB_CON_LV1: Controls ESP32-S3 USB pins connection to the bottom USB Type-C port, or routing to the USB_CON_LV2 switch.
- USB_CON_LV2: Controls routing from USB_CON_LV1 to the front USB Type-C port or USB Type-A port.
USB Port Power Supply Note
The bottom USB Type-C port only supports input power, while the front USB Type-C / USB Type-A ports only support output power.
Power Manager
| STM32G031 | PA12 | PA11 |
|---|---|---|
| INA226(0x40) - USB | PM_SDA | PM_SCL |
| INA226(0x42) - PORT.A | PM_SDA | PM_SCL |
| INA226(0x43) - PORT.C | PM_SDA | PM_SCL |
| INA226(0x44) - PWRCAN | PM_SDA | PM_SCL |
| INA226(0x45) - PWR485 | PM_SDA | PM_SCL |
| INA226(0x46) - Battery | PM_SDA | PM_SCL |
| SC8721 | PM_SDA | PM_SCL |
| RX8130CE(0x32) | PM_SDA | PM_SCL |
| STM32G031 | PA1 | PA0 | PB8 | PC14 | PC15 | PB1 | PA8 | PC6 |
|---|---|---|---|---|---|---|---|---|
| INA226_PWR | nVA_EN | |||||||
| DC_INPUT_DETECT | VIN_DET | |||||||
| USB_PWR | OEN_USB | |||||||
| PORT.A_PWR | OEN_GRV_R | |||||||
| PORT.C_PWR | OEN_GRV_B | |||||||
| RS485_CAN_PWR | OEN_PWROUT | PDCDC_REFLOW | ||||||
| SC8721_DCDC_PWR | PDCDC_EN |
RS485 & CAN Port Output Power Config
When using the SC8721 buck-boost power supply for forward output, INA226_PWR must be enabled. RS485_CAN_PWR enables OEN_PWROUT for forward output, enables SC8721_DCDC_PWR, and PDCDC_REFLOW must be held low.
RS485 & CAN Port Reverse Power to Main Unit Config
In this mode, disable SC8721, set OEN_PWROUT low, and PDCDC_REFLOW high. This allows external power to backfeed to the host via the PWRCAN or PWR485 ports.
| ESP32-S3 | G14 |
|---|---|
| EXT 2.54-16P 5V PWR | OEN_5VO |
| STM32G031 | PB0 | PA6 | PB5 |
|---|---|---|---|
| CHARGE | CHG_EN | CHG_STAT | |
| WAKE_UP | nSTBY_WAKE_UP |
HY2.0-4P
| HY2.0-4P | Black | Red | Yellow | White |
|---|---|---|---|---|
| PORT.A | GND | 5V | G15 | G16 |
| PORT.C | GND | 5V | G1 | G2 |
EXT 2.54-16P
| PIN | LEFT | RIGHT | PIN |
|---|---|---|---|
| BAT-2S | 1 | 2 | BAT-2S |
| HVIN | 3 | 4 | 5VOUT |
| GND | 5 | 6 | GND |
| G43 | 7 | 8 | RST |
| G44 | 9 | 10 | nWKUP |
| G42 | 11 | 12 | G7 |
| G41 | 13 | 14 | G6 |
| G4 | 15 | 16 | G5 |
Model Size
Datasheets
Softwares
Arduino
ESP-IDF
PlatformIO
[env:m5stack-powerhub]
platform = espressif32@6.10.0
board = esp32s3box
framework = arduino
upload_speed = 1500000
monitor_speed = 115200
board_build.arduino.partitions = default_16MB.csv
board_build.arduino.memory_type = qio_opi
build_flags =
-DESP32S3
-DBOARD_HAS_PSRAM
-DCORE_DEBUG_LEVEL=5
-DARDUINO_USB_CDC_ON_BOOT=1
-DARDUINO_USB_MODE=1
lib_deps =
https://github.com/m5stack/M5Unified.git#develop
https://github.com/m5stack/M5GFX.git#developInternal Firmware
Protocol
Video
- PowerHub Product Introduction and Case Demonstration