• M5Stack Timer Power Unit with OLED display and INA3221 monitoring
  • M5Stack TimerPWR battery scheduling and power control Unit
  • M5Stack Timer Power Unit Type-C charging and Grove output view
  • M5Stack TimerPWR 0.66-inch OLED status interface
  • M5Stack Timer Power STM32 RTC timed switching hardware
  • M5Stack TimerPWR INA3221 voltage and current monitoring Unit
  • M5Stack Timer Power battery connector and interface layout
  • M5Stack TimerPWR compact scheduled power module view
  • M5Stack Timer Power Unit for periodic sensor nodes
  • M5Stack TimerPWR dimensions and enclosure details
  • M5Stack Timer Power Unit application and feature overview
  • M5Stack TimerPWR package contents with Grove cable

M5Stack Timer Power Unit with OLED Display (INA3221)

M5Stack Timer Power Unit with OLED Display (INA3221)

LB-M5-U189

20 in stock
$15.00 USD
$15.00 USD $9.95 USD

M5Stack Timer Power Unit for Scheduled Battery Systems

The M5Stack Timer Power Unit combines RTC-based power scheduling, battery charging, boosted 5V output, current and voltage monitoring, and a local OLED interface. An STM32G031G8U6 controller manages timing and system control, while the INA3221 monitors electrical conditions for the input and output paths.

This unit is designed around a connected 3.7V lithium-polymer battery. The USB Type-C port supplies 5V for battery charging and is not intended to directly power the Grove output. A built-in charging circuit is specified at 330mA, and the internal DC-DC boost stage provides 5V output for external devices through Grove. Output capability depends on the connected battery capacity and discharge rating.

Schedule Automatic Power-On and Power-Off

RTC cyclic timing control allows a device to power up only when work is required. This can reduce idle energy consumption in periodic sensor nodes, portable instruments, demonstration systems, or unattended devices. Define the wake schedule around actual startup time, measurement duration, data transmission, and safe shutdown behavior.

Monitor Voltage and Current with INA3221

The INA3221 provides real-time electrical monitoring for development and diagnostics. Use measured values to detect unexpected load changes, battery behavior, or output conditions, while remembering that system protection should still be designed around the battery, charger, wiring, and connected load.

Local OLED and Button Configuration

A 0.66-inch 64 × 48 OLED and two side buttons provide local status and configuration. Settings can also be accessed through I2C at address 0x56. Check the full I2C address map before adding the unit to a bus with other peripherals.

Battery and Output Planning

The Grove output current varies with battery capability. The product specification gives example output figures for different battery capacities and 1C discharge conditions; treat these as reference conditions rather than a universal guaranteed current for every battery. Size the battery for peak load, startup surge, runtime, temperature, and aging.

Technical setup details are available in the M5Stack TimerPWR documentation.

M5Stack Timer Power Unit with OLED Display (INA3221)

$15.00 USD

How can I confirm product compatibility?

Check the product specifications, operating voltage, communication interface, dimensions, connector type, and software requirements before ordering. Compatibility may also depend on your controller, operating system, development framework, library version, and project wiring.

If you are unsure, contact us before purchasing and include your controller model, intended application, power source, and any other hardware you plan to use. We will help you identify the most suitable option, but we cannot guarantee that every product will work with every platform or project.

Does the product come with a warranty?

Warranty coverage may vary by product and manufacturer. If your order arrives damaged, incomplete, or appears to have a manufacturing defect, contact us as soon as possible with your order number, product model, and clear photos or videos of the issue.

Our team will review the information and provide the appropriate next step according to the applicable product and after-sales policy. Damage caused by incorrect wiring, unsuitable voltage, unauthorized modification, soldering, misuse, or operation outside the documented specifications may not be covered.

How long does shipping take?

LogicBoundless provides worldwide shipping, with primary service coverage across the United States, Europe, and Asia. Orders are generally fulfilled from Shenzhen, China, and tracking information is provided after dispatch.

Processing and delivery times depend on product availability, destination, customs clearance, and the selected shipping service. Please review the Shipping Information page for the latest estimated delivery times and shipping conditions.

What is your return policy?

Eligible products may be returned within 30 days of delivery. Returned items must be unused, unsoldered, unmodified, and kept in their original condition with all packaging, cables, accessories, manuals, and included components.

Please contact support@logicboundless.com before sending anything back. Returns made without prior approval may not be accepted. Original shipping charges are generally non-refundable unless the return is caused by a verified product defect or fulfillment error.

Can you help if I have a technical problem?

Yes. LogicBoundless provides practical technical guidance for product setup, wiring, power, communication, code, and configuration issues.

To help us understand the problem efficiently, please provide your controller model, wiring photos, power source, code, library or firmware versions, expected behavior, and complete error messages. We cannot promise that every component will work in every system, but we will help you identify the likely cause and the next practical troubleshooting step.

Can I change or cancel my order?

Contact us as soon as possible if you need to change or cancel an order. We will try to assist before the order enters processing or is handed to the shipping carrier.

Once an order has been packed or dispatched, it may no longer be possible to change the products, delivery address, or shipping method. In that case, the standard return process may apply after delivery.

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