Hw-044: Datasheet

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and is used to bridge serial communication between standard RS232 devices (like old PCs or industrial equipment) and microcontrollers (like Arduino/ESP32). Core Specifications: Main Chip: MAX3232CSE Operating Voltage: 3.0V to 5.5V (compatible with both 3.3V and 5V systems). Data Rate: Operating Temp: -40°C to +85°C Power supply (3V–5V). Common Ground. Transmit data (TTL side). Receive data (TTL side). Important Wiring Note:

The HW-044 is a compact, pre-assembled module designed to drive common-cathode LED displays. Its core component is the integrated circuit from Maxim Integrated (now Analog Devices). The module allows microcontrollers (e.g., Arduino, ESP32, STM32) to control up to 64 individual LEDs (8 digits of 7-segments plus decimal points, or an 8x8 dot matrix) using only three I/O pins .

To interface the HW-044 with an Arduino or similar MCU, use the following pin mapping: HW-044 Pin MCU Connection Description 3.3V or 5V Match the logic voltage of your MCU Common ground (Must be shared between all devices) Data sent from the RS232 device to the MCU Data sent from the MCU to the RS232 device Helpful Pro-Tips for Implementation Common Grounding hw-044 datasheet

: Power input (3.3V or 5V). Match this to your microcontroller's logic level. GND : Common Ground.

Supports dual-level logic from 3.0V to 5.5V , making it compatible with both 3.3V (modern microcontrollers) and 5V (standard Arduino Uno) systems.

Ensure a 0.1µF ceramic decoupling capacitor is placed close to the VCC and GND pins of the module to filter out power supply noise. This public link is valid for 7 days

// I2S pins #define I2S_BCLK 26 #define I2S_LRC 25 #define I2S_DIN 22

Based on available information, HW-044 could also refer to:

This is a standard DB9 female connector (often labeled RS232 ). Can’t copy the link right now

void loop() currentTouchState = digitalRead(TOUCH_PIN);

What battery are you planning to charge?

) and the battery cells as short and thick as possible to minimize voltage drops that can prematurely trigger the CV phase.