In order to read this type of sensor, we need a different type of pin. There is a difference between an on/off sensor (which detects the presence of an object) and an analog sensor, whose value continuously changes. Arduino is able to detect whether there is a voltage applied to one of its pins and report it through the digitalRead() function.

This tutorial takes the reader through a step-by-step solution to the problem of reading multiple analog inputs 'simultaneously' with an Arduino Uno.You may recall that you can use the Arduino analogRead() function to measure the voltage of an electrical current from sensors and so on using one of the analogue input pins. However, our testing shows that the changes in one measurement, for example the temperature, will also affect analog readings of a another input, which stays unchanged in physical world. In our original design, we coded the program to take in two analog inputs at the same time. Int sensorValue analogRead(rainPin) Sep 25.In our project, we use analog readings in Arduino programming to achieve our goal of measuring the temperature and the light intensity.

Notice that the ReadTemp() function is called after ReadLight(). The final piece of code represents the times which the temperature and light read functions are called. In each function, only one parameter is processed. The first reading of each input is overwritten by the second and the delay allows time for the voltage to stabilize.For the general case your code should look something like this:The problem of this method is that the delay() function will interfere with the delta timing we implemented in the loop, causing unintended timing problems in the program.The first two images represent the light and temperature readings respectively.

However, since the delay method will interfere with our delta timing in the loop, we decided to use the second method.

Arduino Analogread