Hw-044 Datasheet Direct

is a compact RS232 to TTL converter module , typically used to connect serial devices (like industrial sensors, GPS modules, or old computers) to microcontrollers like Arduino, ESP32, or Raspberry Pi. It is centered around the integrated circuit. Quick Technical Overview (supports 3.0V to 5.5V logic) : DB9 Female (RS232 side) and 4-pin Header (TTL side) Operating Voltage : 3.3V or 5V (determined by your microcontroller's VCC) Logic Level : TTL/UART (Transistor-Transistor Logic) : Typically supports up to 250 kbps Pinout and Connections

• Driver IC: MAX7219CNG (or similar variant).
• Supply Voltage: 5V DC (logic and LED power).
• Logic Level: 5V tolerant; 3.3V logic may work but is not guaranteed for all units.
• Current Control: Digitally adjustable segment current via a single external resistor (usually pre-soldered as an RSet resistor).
• Communication Protocol: Serial, 16-bit data packets (DIN, CLK, LOAD/CS).
• Display Type: Supports common-cathode 7-segment displays or 8x8 LED matrices.

• Digital clocks and timers
• Temperature displays
• Scoreboards or counters
• Small text/information panels (with 8x8 matrix)
• Industrial control panels

and Arduino TX to TXD. Note that some modules may be wired as DTE instead of DCE, requiring a crossover. Arduino Forum 2. HW-044 3.5" TFT LCD Touch Screen Alternatively, the ALMOCN HW-044 refers to a 3.5-inch IPS TFT LCD display module. Connecting HCM375B-232-68N with arduino - Page 4 hw-044 datasheet