The H2O2-USB CH330N is a USB to Serial bridge so moving serial data to and from the Arduino is as simple as connecting RX, TX and GND, to the CPU's UART or Soft Serial port. Use it to have instant and continual access to your programs data, no more swapping from programmer to data output and back again with each update. It utilizes the CH330N, an inexpensive USB to Serial converter, made by WCH Co Ltd.
The design of the H2O2-USB CH330N output connector is fully user selectable. Get the pinout you need in the order you require. Accomplish this by removing the solder on the Solder Bridged pads, and connecting the needed through hole Via to the needed output position with a jumper wire. The default pinout is [ 1:GND | 2:+V | 3:TX | 4:RX | 5:RTS ].
The H2O2-USB CH330N is designed to be compatible with ESP8266, Arduino Pro Mini, a Standalone or your own Bread Board Arduino, even those damaged Arduino Nano, Arduino Duemilanove, Arduino Diecimila, clones with those faulty counterfeit copies marked FTDI can once again be utilized and reprogrammed. If you want a reliable Chip Set that won't maliciously be damage by a simple OS driver update then this is the solution.
Fixed Comport number assignment, Each USB hub's port will be assigned a different comport number. This number can be changed within the Windows environment.
There are two red LED's indicating activity for RX and TX. They will blink when data is present. The Power indicator is Green and is on when the 3.3V or 5V jumper is selected.
Why did I make it?
I had a need for a small USB serial programmer/data port. That was also versatile and functioned on AVR/Arduino CPU's.
Supports these Baud rates in Arduino IDE 300, 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 2000000
Supports Special non-standard Baud Rates like 74880 on ESP8266's Bootloader, 56000, 57600 and 76800 used by some boot loaders when uploading software
This board is sold ASSEMBLED as shown, WITHOUT pin header Soldered.
Half the Price of Similar Modules
All data and modem control pins broken out.
Assembled in the USA.
Dimensions
16mm x 53mm, 0.62" x 2.1" - With USB Connector and Board
16mm x 38mm, 0.62" x 1.5" - With Board
Package List:
◈ 1x H2O2-USB CH330N 3.3V & 5V-TTL Serial, Assembled and Tested With Optional Parts and or Services as Ordered. Note: The 5 pin Programming Headers is not normally soldered; Option.
Most serial terminals.
Putty R 0.66 or Higher
Arduino IDE Serial Terminal
Supported Programmers:
Arduino IDE V1.8.2 or Higher
No modifications are needed to serial load programs Via Arduino Bootloader
○ Serial programming is supported through a normal comport
AVRDUDESS V2.4, V2.6 or Higher
Serial Programming is achieved by a simple modification to the Avrdudess configuration file. Would you like to Know More?
○ Serial programming is supported through a normal comport.
○ Read and Write Hex Files of the Flash and EEPROM Memory.
○ New Programmer will be Added: "#H2O2-USB CH340G/CH340C/CH330N TTL Serial"
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