The CH34X family comprises widely used USB‑to‑serial chips manufactured by WCH (WinChipHead), commonly integrated into generic UNO R3, ESP8266, and ESP32 development boards.
Overview
- BUILT-IN I2C CONTROLLER The PCF8574T I2C chip is soldered directly onto the display PCB, so there is no add-on adapter board stacked on the back. Total thickness stays at 12 mm, letting the module sit flush against a panel or housing wall.
- NO SOLDERING REQUIRED The 4-pin header is pre-soldered at the factory. Plug jumper wires into VCC, GND, SDA and SCK and the display is ready to run. No soldering iron and no 16-pin header to assemble, so first-time builders can start in minutes.
- ONLY 2 SIGNAL PINS I2C uses SDA and SCK only, leaving the rest of your GPIO free for sensors, buttons and SD cards. The A0, A1 and A2 solder pads change the address, so all three displays can share one bus. Default address is 0x27.
- 3-PACK WITH BEZELS AND SCREWDRIVER Includes 3 displays, 3 snap-on black front bezels that hide the bare PCB edge for a finished panel-mount look, and 1 mini screwdriver fo... Read More...
3-Pack 1602 LCD Display Module, I2C 16x2 Blue
$27.99
Projects
HC-05 Bluetooth Module and Arduino Beginner Tutorial
This is a basic example to get you start with HC-05 Bluetooth Module. Depending on your specific requirements and the functionality you want, you may need to expand and modify the sketch accordingly.
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