Stamp Timer Power2

Overview

SKU:S021

Stamp Timer Power2 is a power management module for low-power embedded devices. It integrates the M5PM1 power management IC and adopts a multi-stage power control architecture that enables power for the main controller and various peripherals on demand, effectively reducing overall standby power consumption and extending battery life.

The module supports DC 5V input/output control, DC 3.7V lithium battery power supply, and input voltage detection. It also integrates a lithium battery charging circuit with two adjustable charging current levels. Featuring a 1.27mm castellated-hole package, the module provides 5 programmable IOs in addition to the basic power input/output control pins. These IOs can be configured as GPIO, ADC, PWM, RGB LED, IRQ, and other functions. The module also supports timed wake-up and external input interrupt wake-up, making it suitable for low-power systems with on-demand power-up, periodic operation, and event-triggered operation.

Features

• Built-in M5PM1 power management IC
• Built-in lithium battery charging IC with two adjustable charging current levels (650mA/180mA)
• 5x programmable expansion IO (GPIO / ADC / PWM / RGB LED / IRQ)
• Supports DC 5V / DC 3.7V battery input power
• I2C communication interface (0x6E)
• 1.27mm-28Pin castellated-hole package

Peripherals & Control

• Power button input signal interface
• Power indicator signal interface
• Boot control interface for MCU download mode control

Includes

• 1 x Stamp Timer Power2

Applications

• Embedded device power management
• Smart home
• Low-power IoT devices

Specifications

Specification	Parameter
Power Management IC	M5PM1
Communication Interface	I2C @ 0x6E, supports 100 kHz (default) / 400 kHz
Power Consumption	Shutdown: DC 4.2V@6.72uA Low-power sleep: DC 4.2V@12.27uA
Battery Charging IC	LGS4056HDA, provides two adjustable charging current levels: DC 3.3V@650mA / DC 3.3V@180mA
Load Capacity	3V3_DCDC_OUT: DC 3.3V@0.6A 3V3_LDO_OUT: DC 3.3V@0.4A PY_3V3: DC 3.3V@0.4A EXT_5V_INOUT: DC 5V@1A
Product Size	18.0 x 14.0 x 2.2mm
Product Weight	0.7g
Package Size	138.0 x 93.0 x 5.0mm
Gross Weight	3.8g

ESP32 / ESP32-S3 Live Web Demo

The project now contains both the hosted Pages demo and a complete PlatformIO firmware:

• web/ — the existing static Pages simulation.
• esp_web/ — the offline hardware console served by the device.
• platformio.ini — only two universal environments: esp32 and esp32s3.
• src/, include/, scripts/ — firmware sources and embedded Web asset generation.

M5Unified/M5GFX detect the actual M5 board, display and I2C bus at runtime. Recognized M5 devices default to the internal M5.In_I2C; unknown or custom wiring uses M5.Ex_I2C. The firmware starts a WPA2 SoftAP, optionally displays a Wi-Fi QR code, guides the user through I2C pin selection and 0x6E detection, then serves the live console backed by real M5PM1 registers and operations.

# ESP32-S3 universal binary
pio run -e esp32s3

# ESP32 universal binary
pio run -e esp32

Firmware outputs are complete images merged with bootloader and partitions:

• dist/S021-ESP32-UserDemo-v0.1.0-<commit>-LHY-<YYYYMMDD>_0x0.bin
• dist/S021-ESP32S3-UserDemo-v0.1.0-<commit>-LHY-<YYYYMMDD>_0x0.bin
• dist/S021-Web-UserDemo-v0.1.0-<commit>-LHY-<YYYYMMDD>.zip (contains web/ and esp_web/)

Both images are flashed from offset 0x0.

See the Web console documentation in Chinese or English for wiring, API, preview and safety details.

Changelog

See CHANGELOG.md.

Related Links

• Product Documentation
• Online Interactive Demo
• Arduino Quick Start
• M5PM1 Arduino Driver Library
• Stamp Timer Power2 Schematics

Required Libraries

• M5PM1
• M5Unified — PlatformIO live web demo
• M5GFX — PlatformIO live web demo
• QRCode — PlatformIO live web demo

Security and Third-Party Notices

• Security policy
• Third-party notices

License

• Stamp Timer Power2 - MIT