I have a problem with my board, impossible to reconize the COM port. Windows 7 say : unable to request usb descriptor...I want to re-burn bootloader (with USBTinyISP) but the Ardu...
JaneYu 2016-06-08 01:36:34 8 Views6 Replies I have a problem with my board, impossible to reconize the COM port. Windows 7 say : unable to request usb descriptor...
I want to re-burn bootloader (with USBTinyISP) but the Arduino IDE say : "avrdude: initialization failed, rc=-1"
I use the board setting : Arduino leonardo
Is a traditional arduino bootloader inside this board ?
I have destroyed 2 boards when connecting POE and the USB at the same time programming - what would cause this?
JaneYu Yes... but not very protective for bottom pins ...
My intent is to place board in Network Patching Cabinet... It's a raw environment...
And most of Arduino Uno Case won't fit the Ethernet connector...
JaneYu Note that this board is based on Arduino Leonardo, which has built-in USB support, instead of using a separate chip for USB communication like most Arduino boards. This means that recognizing the device is a bit more finicky. See "Automatic (Software) Reset and Bootloader Initiation" here: https://www.arduino.cc/en/M.... Uploading to the board requires resetting it, and that means temporarily breaking USB connection. The software does not always succeed at (re-)establishing connection.
In my experience, manually resetting the board is frequently necessary. This is my approach on Windows: With the Ethernet board connected to the computer, press and hold the reset switch for a few seconds, allowing Windows to detect the disconnect, then release the reset switch, allowing Windows to re-establish connection. Windows will produce 3 audible tones during this process, one after disconnect and two after reconnect. The board should be recognized a few seconds after the last tone. If you do this too quickly, the connection will not be established and the virtual serial port will not be available.
A similar technique for programming the board is described under "Uploading Code to the Leonardo and Micro" here: https://www.arduino.cc/en/G....
JaneYu Hi, what is your mean of L1 or D2 getting hot? If the w5500 chip gets hot, it's OK.
JaneYu Need to define the "SS" pin again, but not sure whether the library is compatible with W5200 and W5100 together.
JaneYu So, what is about a W5200 Ethernet shield with a Bluno M3, http://www.dfrobot.com/inde... http://www.dfrobot.com/inde...
JaneYu 
