I have a SainSmart Mega and when I connect it to my PC, it recognizes it but only as an "unspecified" device and doesn't give it a COM port (see image) and in device manager it shows up as AT90USB82 (see other image). I went through this process: https://www.arduino.cc/en/Hacking/DFUProgramming8U2 ,…

Arduino Mega - No com port

leejones15 April 11, 2018, 9:57pm 4

Not a high quality picture, but at least legible. Here is the chip.

Topic		Replies	Views
Mega 2560 Firmware (XP) IDE 1.x	2	1442	May 5, 2021
Arduino Mega 2560 R3 is not detected by the computer. IDE 1.x	4	1806	May 5, 2021
Arduino Mega2560 stopped being detected in Windows XP IDE 1.x	1	1259	May 5, 2021
Arduino Mega 2560 in DFU mode IDE 1.x	6	7262	May 5, 2021
Problem interfacing ArduinoMega-2560 with laptop IDE 1.x	7	1340	May 5, 2021