#ARDUINO PRINTLN ERROR STRING SERIAL#

These are the errors that popup on the terminal for rosrun rosserial_python serial_node. Ros::Subscriber sub('/ignis/move', comCallback) Void comCallback( const std_msgs::String& command) When changing the url link, the graph does not appear. I want to put this value in html so that the graph moves in real time. What am I doing wrong Update After correcting my original errors, I now have this issue: Serial. The value of the temperature and humidity sensor is measured through the Arduino and appinventor outputs it. This is probably an awkward way to input data but it's the only way I have found. The terminal is also showing a few errors which I am not able to decipher. Arduino's docs on String seem to imply that these should work. 1 I've tried various types for 'h' and other ways to get what I need such as String h 1 and String h What I need: User inputs some characters but is not allowed to repeat any.

#ARDUINO PRINTLN ERROR STRING SERIAL#

The output on the serial monitor is not consistent its printing random values onto to screen.

Then you use the sprintf() function to combine our text and variables into a string. I am working with arduino nano to subscribe to a topic which reads keystrokes(Raspberry pi ubuntu mate melodic) and publishes into onto the topic.I am trying subscribe to the topic on an arduino which then prints the value onto the serial monitor. First, youll create in a character array to save the output string.

Arduino println error string