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macrumors newbie
Original poster
Jan 30, 2020
Hi all,

I'd like to connect my ESP8266 Board (Wemos Mini) to Catalina. The Board has a build in USB-UART Controller which is idendified by Catalina as the system information indicates:

CP2104 USB to UART Bridge Controller:

Product ID: 0xea60
Vendor ID: 0x10c4 (Silicon Laboratories, Inc.)
Version: 1.00
Serial Number: 01E32666
Speed: Up to 12 Mb/s
Manufacturer: Silicon Labs
Location ID: 0x14400000 / 16
Current Available (mA): 500
Current Required (mA): 100
Extra Operating Current (mA): 0

The log file the icdd process identifies the chip correctly

Device DB | Creating local devices
Device DB | Creating bonjour devices
Added | [USB][ CP2104 USB to UART ] ( 0, 0, 0) @ 0x14400000 |
Inferior | [USB][ CP2104 USB to UART ] (ff, 0, 0) @ 0x14400000 |

Unfortunately no device in /dev/ is created so I cannot use the interface.

When I connect a FT232R Chip a correct device named "tty.usbserial-A505WX8P" is created.
Added | [USB][ FT232R USB UART ] ( 0, 0, 0) @ 0x14230000 |

Are there any specific actions I can take to narrow down the root cause? Any additional debugging?

I'like to avoid third party drivers like the ones from slabs because of this.



macrumors 68000
Aug 13, 2009
I suggest you having a look at "" from Decisive Tactics, Inc.

IMHO, this app is worth every penny.




macrumors newbie
Original poster
Jan 30, 2020
Hi Mike,

thanks for the hint. I have seen this in the shop and the price (33 Euros) might be justified when you do nothing but connect to different serial devices all day long, but to be frank I expect the MacOS to do the job as Windows does out of the box. Anyway thanks for the tip.

As far as I understood this posting correctly from here and here there's probably a major issue in the area.
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