El Capitan upgrade has broken the Arduino IDE serial comm to Arduino Mega 2560 boards.
The boards are clone Mega 2560, I have three different boards
SunFounder Universal Starter Kit for Arduino (With MEGA 2560)
XCSOURCE ATmega2560-16AU ATMEGA16U2 Board
Ieik Mega2560 R3 ATmega2560-16AU + ATMEGA16U2
All worked well under Yosemite, stopped working after El Capitan OSX update.
After running Arduino IDE the port is seen as /dev/cu.usbmodem1A21, open serial monitor, no communication with boards... Type one char in serial monitor... Mac bluetooth devices lockup (keyboard, trackpad) no comm with boards.... have to reboot....
Probably have to reinstall Yosemite, but would like to see if anyone has a solution for El Capitan first....
Any help is very appreciated...
Thanks
HBRancher
Posts: 3
Joined: Wed Oct 07, 2015 5:19 am