![]() Line = 0 #start at 0 because our header is 0 (not real data) Technically, we’re finished collecting readings, here but if you’d like to set the number of samples to collect, you can throw everything into a while loop, like so. Create an Arduino Data Logger: Send Serial Data into a CSV FileĪfter that, you can read the serial port, parse the data, and print it to the terminal. I added a few print statements to let the user know what’s happening in the code. Print("Connected to Arduino port:" + arduino_port) You can use the input parameter “w” to write a new file or “a” to append to an existing file. Next, set up the serial connection and create the file. ![]() If((curr1 >=data1+threshold || curr1 =data2+threshold || curr2=data1+threshold || curr1 =data2+threshold || curr2 Port. We can use this threshold in our conditional statement. Int threshold = 1024*percent //within x% in either direction Note: This will trigger the next increment of the threshold the next time the sensor meets this requirement unless you add a delay. 1024 comes from our analog pin, which has a 10-bit resolution. To set this up, you can create a couple of globals to easily adjust your thresholds. So, if you run the code above, and you’re not happy with how it’s working, you may need to set up a conditional range.įor example, you can display data if the new reading is +/- 5% of the current reading. Idea B: Print Data based on Conditional Rangesįurthermore, sensor readings can be a bit picky and oscillate between +/- 1 of the same reading. To do this, we can set some global variables equal to the current reading and then collect a new reading for comparison. You’ll only want to log a reading if it’s different than previously. In some cases, you may not want to print out the same reading every single time. A good example of this is if the current reading is the same value as the previous reading. Sometimes, you’ll want to impose conditions on your data collection. Idea A: Display Data Only if the Sensor Readings are Different Open a Serial Monitor, and you should have readings that look like the following. This code works as-is, and you can upload it to your Arduino and test it out. We’re going to use the CSV format for our data, so the data should look like this: data1,data2 //globals We have the data, now we need to display it on the Serial Monitor. Int freq = 1000 //data collection frequency ~x milliseconds Int data1, int data 2 //store data from both sensors Add a delay so that we’re not collecting data too fast. Then, use the analogRead() method to read the pin. Create a few globals to store data from both of the sensors. put your setup code here, to run once: Then, begin the Serial Monitor at 9600 baud, and set these sensors as INPUTS in the setup() method. Next, open up a new Arduino sketch and assign two global variables to pins A0 and A1 (or whatever pins your sensors are connected to). Write Arduino Sketch to Read & Send Data Serially
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