arduino lcd panel kullan谋m谋 factory

My setup is a flow meter that meters our water usage in the house, connected to the meter is the Arduino Uno and the display shield. All Powered by 230V to 5V USB wall socket adapter. We sometimes have power spikes in our area and at first I immediately thought that this was the cause, but apparently not, because I"ve tested and external battery to power the system and the problem still occurs.

Someone somewhere said that the LCD should be cleared with the lcd.clear(); command before writing new data to the screen. This I have not yet tested.

I put it to clear a certain part of the lcd where the millisecond counter is. It never cleared. When i replaced the lcd.print(""); with lcd.print("."); it displayed an period where I wanted the nothing.

This stems from the fact that the LCD controller itself does not inherently support the function and in fact treats the ASCII codes for and as displayable characters instead of control codes.

In my opinion the basic LiquidCrystal library should concentrate on implementing all of the capabilities of the LCD controller and no more. If people want a library that more closely emulates a CRT (or LCD) terminal that is fine, but I think it should be done in a different library.

I am on a tight budget since I have so many other hobbies as well but am getting into Arduinos and want to be able to output GPS location data for a fun project I have in mind. I want to confirm if it"s possible to get the cheap LCD I linked above working with an Arduino Pro or Uno and can I get it working with a GPS connected as well or do I need to go with the SparkFun LCD screen instead as it"s a little more ready to go?

I do have programming experience but mostly in MATLAB. I"ve looked at the Arduino sketches and don"t think it"s really too difficult so I don"t foresee any problems but it is my first microcontroller that I"m dealing with. I know a good deal about basic electronics as well so all the circuit stuff isn"t an issue.

In 4 bit mode, the host and the LCD must remain in nibble sync. If they lose nibble sync with each other, it will never recover so the LCD will start to see garbage commands.

So if the library is in 4 bit mode and you power cycle only the LCD, the host (arduino) and the LCD will not be in the same mode (LCD in 8 bit mode, host in 4 bit mode) and the LCD will see garbage commands.

In 8 bit mode, it is still possible to get glitches on the display, but since things are done byte at a time there is no nibble synchronization issue so any effects of noise should be short lived and future commands to the LCD should continue to work.

Explanation: the glass of the lcd lays on the top and the bottom on a kind of "rubber" in which electrical lines are integrated to lead the signals from trhe pcb to the contacts of the lcd glass.