Click on the picture below and download free Arduino Software!
A BMP280 barometric pressure, a microSD card reader and a thermocouple amplifier are connected to the Arduino. All tumbler events are written to a log file on the microSD card including the channel number, the time at which the event occurred, the air pressure at that time and the temperature as recorded by the thermocouple. For ease of use, other log files (e.g. a summary of what has happened in the last 24 hours) which are calculated from this event data, are also stored on the memory card. A suite of Python utilities has also been developed to simplify set up and operation of the data logger.