String.substring() String.toCharArray() String.toDouble() String.toFloat() String.toInt() String.toLowerCase() String.toUpperCase() String.trim() String Operators String += (append) String == (comparison) String + (concatenation) String != (different from) String [] (element access) String...
The sfReader.substring() failed because the message did not contain the * char and so msg.indexOf('*') returned an index equal to the length of the msg and so the starting index for the substring was beyond the end of the msg and an empty sfCheckSumHex was returned and an error mes...
For example, when the slider is at0, you make an HTTP GET request on the following URL: http://192.168.1.135/?value=0& And when the slider is at180degrees, you’ll have something as follows: http://192.168.1.135/?value=180& This way, when the ESP32 receives the GET request, it ...
Using the substring() function we get the remaining text, or that’s the position value, we convert it into integer and use the value to move the servo to that position. // If "Waist" slider has changed value - Move Servo 1 to position if (dataIn.startsWith("s1")) { String data...
backG = stringG.toInt();StringstringB = dataIn.substring(dataIn.indexOf("B") +1, dataIn.indexOf("E")); backB = stringB.toInt(); }elseif(dataIn.startsWith("3")) {StringstringBrightness = dataIn.substring(dataIn.indexOf("3") +1, dataIn.length()); ...
An application programming interface (API) is a set of functions written by software developers to enable anyone to use their data or services. TheOpenWeatherMapproject has an API that enables users to request weather data. In this project, you’ll use that API to request the day’s weather...
substring(0, newLineIndex); lcd.print(lineOne); String lineTwo = serialContent.substring(newLineIndex + 3); lcd.setCursor(0, 1); lcd.print(lineTwo); return scrollSize(lineOne, lineTwo); } int scrollSize(String lineOne, String lineTwo) { // Scroll directionally if either line > ...
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{ var title = titles[i]; var spaces = ''; if (title.length > 32) title = title.substring(0, 29) + '...'; if (title.length < 32) spaces = new Array(32 - title.length + 1).join(' '); titlesString += title + spaces; } lcd.autoscroll().print(titlesString); }); });...
There’s an add-on for the Arduino IDE allows you to program the ESP32 using the Arduino IDE and its programming language. Follow one of the next tutorials to prepare your Arduino IDE to work with the ESP32, if you haven’t already. ...