In my application, greenhouse parameters were collected and provided as shown in the figure. The same data was re-formatted, in the application and forwarded to the logger using an alternate string.

Once the data is logged, the SD card can be removed and the .csv file opened in spreadsheet software to make a graph showing temperature change over time. Posted in Arduino Hacks , green hacks ...

[digitaltrails] wanted the data on a few old IBM 80-column punch cards he had lying around, but didn’t have decades old computer hardware in his garage. He decided to build his own out of LEG… ...