Due to a technical constraint (number of interrupts in the micro controller to be exact), the infrared receiver block only works when uploaded in the Arduino mode. Sorry for that.
The high speed is achieved at the cost of driving power. So the stepper motor may stop moving in the high speed mode under a very little friction.
if you have your bluetooth adapter attached, you need to detach it. It interfere with the serial port connection.
No, it’s not. Some software alarm at softwares that have interaction with hardwares. Not convinced? See this Virus Scan Report
“Communication” blocks are used to handle serial port Communication when uploaded to the Arduino chip. Its content includes sending and receiving serial port command and comparing strings.
Stepper motors requires a higher voltage than what AA battaries or 18650 lithium battaries can provide. An AC Adapter is required.
Please make sure: 1. you have chosen the right board type under “Boards” menu; 2. you have disconnected the bluetooth module.
this is due to an outdated version of Arduino in your computer. Uninstall Arduino and delete all contents in “C:\Users\\AppData\Roaming\Arduino” to solve this problem. Visit [this link](http://forum.arduino.cc/index.php?topic=313176.0;nowap ) for more information.
Because Arduino IDE need Administrator permssions for some functions, so running mBlock with Administrator permssions would solve this problem.