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TimerPWR Unit - Power management module with 0,66'' OLED display - INA3221 - Unit extension module - M5Stack U189
Timer Power Unit is a versatile module with power supply, charging, discharging, time switching and display functions . Equipped with STM32 chip, it enables precise control of power on/off time . Thanks to built-in DC/DC circuit, it provides stable 5V power supply for external devices. Voltage and current monitoring is done in real time, and interaction with the module is done via OLED display and buttons .
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Product description: TimerPWR Unit - power management module with 0.66'' OLED display - INA3221 - Unit expansion module - M5Stack U189
Timer Power Unit is an extension for M5Stack development modules, enabling precise management of electronic power supply . Equipped with the STM32G031G8U6 microcontroller, it supports functions such as charging, discharging, time switching, monitoring power supply parameters and displaying on the OLED screen . The module allows you to set the device's on and off times , which is particularly useful in applications requiring remote or automatic power supply control. Thanks to the built-in DC/DC circuit, it is possible to stably power external devices with 5 V , and the INA3221 sensor allows for accurate tracking of input and output voltage and current . Communication with the device is via the Grove and I2C interfaces, which ensures convenience in integration with other modules and sensors.
Also check out the user guide prepared by the manufacturer!
TimerPWR Unit - power management module with 0.66'' OLED display - INA3221 - Unit expansion module - M5Stack U189.
Botland is an official distributor of the M5Stack module family in Poland. We have extended this system of stackable functional devices with accessories from our range and numerous blog guides. All M5Stack products presented here are original.
The module is based on the STM32G031G8U6 microcontroller.
Key Features of TimerPWR Unit
- RTC cyclic time control : allows precise setting of power on/off times
- Battery powered : allows you to power your device using a 3.7V lithium polymer battery
- Built-in DC/DC circuit : provides stable 5V/800mA (up to 1400mA when battery powered) power for external devices
- Current/voltage monitoring : using the built-in INA3221 sensor, allows for real-time monitoring of power supply parameters
- OLED Display : 0.66-inch OLED screen (64 x 48 px), allows easy display of system status and configuration
- Grove Interface : allows easy communication with other modules and sensors
- Button Control : Allows you to manually change power settings
- I2C communication : enables remote configuration and integration with other systems
Compatibility and programming
Timer Power Unit supports programming via I2C communication, which ensures easy integration with microprocessor systems, e.g. in Smart Home applications, industrial automation or IoT devices. Thanks to the built-in STM32 microcontroller, it is possible to easily adapt the module's functions to individual needs. It is also fully compatible with popular platforms such as Arduino IDE and UiFlow . Communication takes place via the Grove interface, which allows cooperation with a wide range of sensors and other expansion modules. Timer Power Unit works perfectly with M5Stack development modules , such as Core , Atom or StickC , offering great flexibility in creating various projects.
TimerPWR is powered via USB Type-C or from an external 3.7 V Li-Pol battery.
The module is equipped with a Grove interface.
Practical applications
Timer Power Unit is the ideal solution for systems requiring precise control of power supply time. It can be used in:
- Smart homes for automatic control of electrical devices
- Industrial automation for managing power supply to machines and devices
- IoT modules for powering sensors and external devices
- Portable devices that require cyclic power supply and parameter monitoring
TimerPWR Unit Technical Specification
- Microcontroller: STM32G031G8U6
- Input voltage: 5V DC (via USB Type-C interface)
- Output voltage: 5 V (from DC/DC boost)
- Battery power supply: 3.7 V Li-Pol battery
- Display: 0.66-inch OLED, 64 x 48 px resolution, SPI communication
- USB Type-C (for battery charging, cannot directly power Grove port)
- Grove (for extensions and communication)
- Battery interface: 2-pin connector with 1.25 mm pitch
- I2C Address: 0x56
- Current sensor: INA3221
- Charging current: 5V @ 330mA
- Charging system: LGS4056H
- Charging temperature: 55°C
- Grove port maximum output current:
- 1400mAh @ 1C 3.7V: 5V @ 800mA
- 500mAh @ 1C 3.7V: 5V @ 700mA
- 110mAh @ 1C 3.7V: 5V @ 400mA
- Standby Current: 4.2V @ 36.67µA
- Operating temperature: 0°C to 40°C
- Dimensions: 40 x 24 x 11 mm
- Weight: 7.5 g
Kit Contents
- 1x Timer Power Unit
- 1x Grove Cable (20cm)
Useful links
| Name | Value |
|---|---|
| Voltage to | 5.0 V |
| Voltage from | 5.0 V |
| Voltage output from | 5.0 V |
| Output voltage to | 5.0 V |
| UC - Microcontroller | STM32G031G8U6 |
| UC - USB | USB C |
| UC - I2C | yes |
| Width | 9 cm |
| Height | 13 cm |
| Depth | 2 cm |
| Weight | 0.013 kg |
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30 days to return, without giving a reason
If the product does not meet your expectations, you have 30 days from receiving the parcel to withdraw from the contract. The product only has to be complete. The right of return belongs to consumers (a purchase unrelated to business activity).
Complaints
If the product turns out to be faulty, you can make a claim under the guarantee or the statutory warranty. We handle claims without delay, at the latest within 14 working days of receiving the report together with the goods.
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Product information
This product is a component intended for further assembly or prototyping. It is not a finished product within the meaning of the product safety regulations.
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