Recently I got a ESS32-CAM card and it contains the same Ch340 chip and it has worked fine even with the USB cable so I suspect that the ch340 designer released an updated design of the chip that meets the USB timing specs or maybe some aspects of the board design are adjusted to help make the timings.īottom line, unless you enjoy chasing down problems you will be better off buying the more expensive ftdi or other non-Chinese designed chips. When I say I get it to work, all I have been able to do is install the wrap connector and get the adapter to talk to itself as verified with putty. This would also explain why sometimes it will work after installing into a different USB connector on the PC since those timings can vary as well. Simply add this programmer to the nf: CH340 based USB-Serial/TTL adapters. Consequently if a chip designer is not careful about meeting USB timing specs then there will be situations when that chip will not work. CH340 Based USB-Serial compatible ICSP programmer. From my work experience I know that the USB timings are very critical in order to maximize performance. However, if I use an extension USB cable most of the time it fails to work. ARDUINO UNO R3 Compatible CH340 Driver DC7-12V DIGITAL I/O Pins 14 (6 PWM ) Analog Input Pins 6 DC Current I/O 40mA SRAM 2KB EEPROM 1KB Flash Memory 32KB/0. I say this because I have noticed that if I plug my Ch340 board directly into my USB port it works. Next, it is apparent that the Ch340 design does not meet USB standards in the area of critical timings. After doing that I was able to solve the install failed problem. First thing to do is run/click the uninstall button. DC Current I/O 40mA SRAM 2KB EEPROM 1KB Flash Memory 32KB/0. Since my last posting I have discovered some things that may help eliminate this problem. ARDUINO UNO R3 Compatible CH340 Driver DC7-12V DIGITAL I/O Pins 14 (6.
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March 2023
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