Questions tagged [data-type]

Identifies the size and nature of information held by a variable in a program. It is language-dependent. Examples for C/C++ include: `int`, `float`, and `char`.

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9
votes
2answers
33k views

How to retrieve the data type of a variable?

I am using Arduino and I would like to know if there is a function that returns the data type of a variable. That is, I would like to run something as like the following: // Note: 'typeof' is a ...
8
votes
4answers
32k views

Convert to and from Unix Timestamp

What is the best way to convert between date, hours, min, seconds to Unix timestamp in milliseconds in Arduino? I need to have this conversion, since I'm using RTC (date, hours, min, secs etc) and ...
0
votes
0answers
49 views

ESP8266 computtion error

The related hardware diagnostic could be found here: ESP8266 not working with MPU 6050 over wire library and I2C .But I'm not so sure it's a hard ware issue any more because I got the reading for ...
2
votes
2answers
2k views

Arduino Variable Data Type?

Is there a variable data type available for Arduino? I have a class that should have a member that will differ in data type, in the past I have used the "variable" keyword in c++ but when I tried to ...
1
vote
1answer
3k views

Put integer and double into char array

I want to print text and numbers mixed in a table with Serial.print(); from a char array. My problem is the conversion between the different data types. My idea is to print the data of the rows in a ...
0
votes
1answer
2k views

Arduino: load variables with values read from SD card

I am having a bit of trouble loading values stored on an SD card and assigning them to variables within my program. I can achieve this as one big block of data, but would much prefer them to be saved ...