Jesus Echavarria @ jechavarria.com has build a 4 in 1 USB Serial converter based on MCP2221A. This board is mainly a USB hub with 4 USB to serial converters.

The device manager has Universal Serial Bus Controllers Flag USB Device Not Recognized. Device Descriptor Request Failed First thing i did was check my USB drivers, but there is not problem with them. Gearmo 4 Port USB to Serial FTDI Cable for MA PC Linux with Windows 10 Certified Drivers. Licenzionnij kod dlya blur $39.98 $ 39 98 Prime. FREE Shipping on eligible orders. More Buying Choices. $35.69 (4 used & new offers) 4.4 out of 5 stars 72.

Is like the typical USB to TTL adapter but with one USB port you get up to 4 serial ports. Indian economy dutt and sundaram pdf. Levels of every converter are selectable by a switch so you can have serial ports with TTL levels (both 5V or 3.3V, configurable by a onboard jumper) or RS232 levels, covering all the possibilities of a serial port. Also the converter he used (MCP2221A) has an I2C port so you also have access to these 4 I2C ports. And finally, you can also have access to 2-pin general IO of the MCP2221A. Jesus writes: Hi all! Here’s one of the last board I design the last year.

On 2016, I develop the board. Although this board works fine, it has a couple of lacks. First one, is that to use the both converters, you need two free USB ports. Is a minor problem today with USB hubs, but you need the hub and also two USB wires. And the other problem is that this board uses mini-USB connectors.

Usb serial number

Of course today you can still find it, but aren’t as common as the micro-USB wires. For this two reasons, I decide to upgrade the board, add the micro – USB connector and put a USB hub inside it. Because I choose a 4-port USB hub, I use also 4 USB serial converters. With some addons, you can select power supply value (5V, 3V3), serial levels (TTL, RS232) and GPIO functions in an independent way for each converter. So, let’s see how works this USB Serial Star, a 4 in 1 USB to Serial and I2C Converter.

Serial Star, a 4 in 1 USB Serial and I2C Converter – [].