Temperature logger

[Kurt]

Hello, I would like to develop a temperature logger which Starts to log temperatures between certain limits
The data is stored until the device has connectivity to the iPhone. It then pushes the Data to the iPhone and the process starts over again. Best would be if radio Connection gets active above a certain temperature. All this should be:

• tiny
• Wireless, i.e. Ble, Driven by cr 2032 3V battery.

Which device should i Take to realize this Project? Is there a dev kit and sample code for xcode available?

Thank you so much for your help,

Curt

[Kurt]

Yes of course. I.e. if you like to know if the soil of your flowers is wet enough or it's already getting dry you can measure the resistance of the soil. In case it is high there is a lot of water, if its low, the soil is dry. So to monitor the dryness of the soil and to give an alarm it would be great to measure the resistance. Is it possible to use one pin of the nRF51822 to measure resistance? Are there already some projects in the same direction?

Thank you very much,

curt

[Kurt]

if you measure several times over time you need to store your results -> its a humidity logger (or resistance logger).