![]()
Arduino Serial Terminal Clear Screen SizeOverview of project I have found myself on several occasions away from a PC but needing a small serial Terminal / monitor to view the start-up diagnostics of one of my projects; the traditional boot-up health check. It is routine for me, after the main project is constructed and working, to add a little diagnostic code which uses the on board serial interface of Atmel chips such as the Atmega328P found in Uno, Mini, Mini Pro. Also, this is applicable to the Nano, Teensy, and 32u4 products from Adafruit and Sparkfun. The Arduino serial monitor isn't a regular terminal so its not possible to clear the screen using standard terminal commands. I suggest using an actual terminal emulator, like Putty. The command for clearing a terminal screen is ESC[2J. Ah, Arduino, I remember when you were just crawling around and blinking LEDs. Now you're ready to learn how to speak! In this lesson we'll learn how to use the Serial Library to communicate from the Arduino board back to the computer over the USB port. Then we'll learn how to manipulate numbers and data. You can use the Arduino environment’s built-in serial monitor to communicate with an Arduino board. Click the serial monitor button in the toolbar and select the same baud rate used in the call to begin(). ![]() ![]() If your project can afford the overhead of the extra code and the light demands of the serial output on the internal UART, then there is little concern for using the serial output. I constructed this project from Chinese parts which totaled: Mini Pro 328. $2.88 ea (delivered in Qty 5) Nokia 5110.$2.61 ea (delivered in Qty 5) Total cost for 5 units including shipping: $27.41Price each. $5.48 I will give equivalent links to U.S. Power houses that stock similar items and stand-by-them with support and replacement guarantees: Adafruit: $10.00Nokia 5110: Sparkfun: $9.95Pro Mini 328 3.3V: To test my portable 3V self-contained serial 9600 BAUD terminal, I connected 2 AAA batteries and a 3.3V GPS with 9600 BAUD output. The success is seen in the lead-in picture and the YouTube video to the right. The code is simple and you can extend it. It only manages newlines and carriage returns at the moment along with numerals and upper/lower case. But it is a hack. And happily, it is totally open source and hack-able by you. ![]() Text-based electrical connections are listed in the Defines.h file of the ZIP, but the connections are identical to the Nokia display in my project: so you can use the Fritzing diagrams there if you prefer. Ray Source code for main program routine. A note about 3.3V input to the Arduino A 3 Volt Arduino allows for direct connection to 3 Volt devices such as the GPS I used as an example and it makes driving the 3V Nokia display a breeze. But, if your serial line is 5 Volts, you will need to down convert the logic level to use on your 3V mini-terminal. There are many considerations and the topic is too convoluted (too many opinions) for me to explain everything here. So, educate yourself and select something appropriate for what you intend on doing: Arduino mini 328 and Nokia 5110. A note about contrast. One of the biggest PITA about the Nokia 5110 is that every one seems to have a different contrast requirements. This essentially is just a line in the code that sets a register in the Nokia controller. But, unless you set this correctly, you may have no display to full dark display and it is ambient temperature sensitive. So, I hacked a simple routine to allow you cycle through all of the possibilities and then when things look the best to you, pull the jumper and the value is written to EEPROM and used afterwards. If you plan on taking this out and about where temperatures will vary this becomes a requirement. To calibrate your display, power the unit off, connect a jumper from Gnd to Arduino Pin D8 and power on the unit. Allow it to cycle once or twice for you to get an idea of what the best display value will provide. Then as the display cycles around again, just pull the wire on Pin D8 when the display looks the best. The value is written to EEPROM and the program restarts and uses that value. You may wish to consider using this routine in all of your Nokia 5110 projects! You may also wish to connect a small push button switch (like Reset) so that you can use a small stylus and set this anytime you desire. Here you see the same photo from. In that post I mention talking about the adapter board in the upper right of the picture later. This is later By keeping a separate dedicated Debug serial connection you avoid the pain of having to keep closing and reopening your Debug terminal. Other benefits include having a so you can build a nice view on your application. Controlling text color, X/Y position, flashing etc. In the picture above you see the Arduino Nano connected to USB as you would normally have it. Aug 22, 2018 - Serial.println('Enter LED Number 0 to 7 or 'x' to clear'). This window is called the Serial Monitor and it is part of the Arduino IDE software. Arduino Serial Terminal Clear Screen Replacement![]() Arduino Serial Monitor InputThis is fine but we can do a lot better. The serial terminal built into the IDE is convenient but closes each time you program. You have to reopen it to see your data. I prefer to use Putty or other terminal application for Debug data. Putty and other have so you can position text, color it etc. Of course you can use Putty now, just open it on the serial port of the Arduino. But you have to remember to close the terminal program before you program.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |