Unit TimerPWR
Description
The TimerPWR Unit is a timed power supply unit whose main functions are "charging & discharging + timed switching + screen display + boost output." It features an internal STM32 microcontroller that implements RTC and overall control, allowing users to set automatic power on/off times as needed. It is powered via the Type-C interface and can be connected to an external rechargeable battery via a 1.25-2P interface. The unit includes a built-in battery charging circuit supporting a charging current of 330mA. It also features an integrated DCDC boost circuit that provides a 5V/800mA (1400mA @ 1C battery power) power output to external devices via the Grove port. Additionally, the INA3221 sensor is built-in, allowing real-time monitoring of power input and output current and voltage. The unit is equipped with a 0.66-inch OLED display and two side buttons for user interaction, making it easy to view real-time system status and modify settings. Users can set parameters such as power on/off using the side buttons or via the I2C bus through the Grove interface with I2C commands. This product is suitable for smart homes, industrial automation, and timed control devices.
Features
- RTC cycle timing control
- Battery power supply
- Built-in DCDC boost circuit
- Current/voltage monitoring
- OLED display
- Grove interface
- Button-controlled power on/off mode
Includes
- 1x TimerPWR Unit
- 1x HY2.0-4P Grove cable (20cm)
Applications
- Timed control devices
- Portable electronic devices
- Powering sensor nodes
Specifications
| Specifications | Parameters |
|---|---|
| MCU | STM32G031G8U6 |
| Input Voltage | Supports 5V DC input (via Type-C interface) |
| Output Voltage | Built-in DCDC boost circuit, output 5V for external devices |
| Battery Power Supply | 3.7V Polymer Lithium Battery |
| Display Screen | 0.66-inch OLED display, resolution 64x48, SPI communication |
| Interfaces | Type-C interface: for battery charging (cannot power Grove port directly) Grove interface: for external sensors and modules, supports communication and power output Battery interface: 1.25mm@2P |
| I2C Communication Address | 0x56 |
| Current Sensor | INA3221 |
| Charging Current | DC5V@330mA |
| Charging Chip | LGS4056H |
| Charging Temperature | 55°C |
| Grove Port Max Current Output | Dependent on battery capacity and discharge ability, e.g.: 1400mAh@1C 3.7V: DC4.96V@800mA 500mAh@1C 3.7V: DC4.97V@700mA 110mAh@1C 3.7V: DC5.03V@400mA |
| Standby Current | DC4.2V@36.67uA |
| Operating Temperature | 0-40°C |
| Product Dimensions | 40*24*11mm |
| Package Dimensions | 136*92*14mm |
| Product Weight | 7.6g |
| Package Weight | 12.9g |
Related Links
Schematic
PinMap
- PORT A Interface
| PORT A | SCL | SDA | VCC | GND |
|---|---|---|---|---|
| Core (Basic) | G22 | G21 | 5V | GND |
| Core2 | G33 | G32 | 5V | GND |
| CoreS3 | G1 | G2 | 5V | GND |
| Atom Lite / Atom Matrix | G21 | G25 | 5V | GND |
| AtomS3 / AtomS3 Lite | G1 | G2 | 5V | GND |
| StickC PLUS / PLUS2 | G33 | G32 | 5V | GND |
- I2C\LED\BUTTON
| STM32G031G8U6 | PB6 | PB7 | PA11 | PA12 | PB4 | PA0 | PA4 |
|---|---|---|---|---|---|---|---|
| I2C1(GROVE) | SCL1 | SDA1 | |||||
| I2C2(INA3221) | SCL2 | SDA2 | |||||
| LED(Charging indicator) | CHAG | ||||||
| Button A | BTN_A | ||||||
| Button B | BTN_B |
- OLED
| STM32G031G8U6 | PA2 | PA1 | PA6 | PA7 | PB0 | PB1 |
|---|---|---|---|---|---|---|
| OLED | OLED_MOSI | OLED_SCK | OLED_DC | OLED_RST | OLED_CS | BL_EN |
Model Size
Protocol
Example
Arduino
Video
- UIFlow 2.0 Use