![]() ![]() One can write Serial within sketches where you use << as a stream operator.īase-conversion specifiers _HEX, _DEC, _OCT, and _BIN are provided, as well as a _FLOAT function (with number of decimal places) and endl. Serial.print(" Var 3:") Serial.println(var3) Serial.print(" Var 2:") Serial.println(var2) Using Streaming.h, in place of Serial.print("Var 1:") Serial.println(var1) So I added ESP8266 mention and a printf wrapper for common AVR modules As mentioned, it's not available on most of the AVR modules. \n is the escape sequence for the line feed.Įscape sequences are used to represent certain special characters within string literals and character literals. More details about formatting tips on the printf format reference page : No need for additional library or function. ![]() Its built-in in Serial class of the framework. Usage examples: p("Var 1:%s\nVar 2:%s\nVar 3:%s\n", var1, var2, var3) // strings Serial.print(buf) // Output result to Serial You can change the limit based on your requirements #include Ĭhar buf // resulting string limited to 128 chars The usage will depend of the data type of your variables. This is the function definition: #ifndef ARDPRINTFįor(i=0 str!='\0' i++) if(str='%') count++ Ĭase 'd': Serial.print(va_arg(argv, int)) Ĭase 'l': Serial.print(va_arg(argv, long)) Ĭase 'f': Serial.print(va_arg(argv, double)) Ĭase 'c': Serial.print((char)va_arg(argv, int)) Ĭase 's': Serial.print(va_arg(argv, char *)) It returns the number of arguments detected in the function call. The function prototype is: int ardprintf(char *. The output as expected is: test 2 123456789 g test 2.30 ![]() See it in action in this example:Īrdprintf("test %d %l %c %s %f", l, k, s, j, f) This function (given at the bottom) can be pasted in the beginning of the files where the function is needed. Python has a module called pyserial, which is also easy great.Įither language will give you much greater control over console output, should you choose to proceed this way.Ardprintf is a function that I hacked together which simulates printf over the serial connection. NET's serialport class which is a pleasure to use. The external program can then display this information in whatever way you'd like, a nice console output would be relatively easy to achieve :-)Ĭ# has. The external program would then keep these values (1 for each sensor). Your Arduino program will need to send a message your external program can unambiguously interpret, something like 1=0.5 where 1 = sensor ID and 0.5 = sensor value. Then concatenate the values together (including separators if it makes the data easier to read)Īn output of something similar to this is what i'm hinting at: | 1.0 | 1.1 | 1.2 | 1.3 | 1.4 | 1.5 | 1.6 | 1.7 | 1.8 |Īll things considered, this isn't a great solution but it would get you a result.Ī far smarter idea is to build another program outside of Arduino and it's IDE that listens to the com port for sensor values sent from the Arduino. To accomplish a fixed width string that's suitable for serial println() you'll need functions to convert your sensor values to strings, as well as pad/trim them to a persistent size. You could also shrink the height of the window to make it look like it only has one line. The Arduino IDE's Serial Monitor's Autoscroll checkbox means if you persistently send the fixed width string (with 500ms delay perhaps) this will give the impression that it's updating once it gets to the bottom and starts scrolling. I can think of a couple of options, the simplest (and cheatiest) is to use println() with a fixed width string that you've generated that contains your sensor data. It's not possible to clear the Serial Monitor window based on incoming serial data. ![]()
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