Do you have a wine cellar, cold room or another place you would like to monitor? Is it important that the temperature should stay between a certain range?
RuuviTag can help.
BME280's +-0.5 °C absolute temperature accuracy and 0.01 °C resolution are more than enough to tell if your valuables are stored in perfect conditions.
This idea is pretty close to the temperature logger but it would be nice to get a notification if the target isn't between the correct temperature thresholds.
This idea has now been implemented with Ruuvi firmware and Ruuvi Station Android app.
No problem. This kind of a temperature monitor could be used in so many places. Not just for monitoring the climate of a cellar.
Ruuvi Innovations Ltd (Oy) / FinlandWeb Design Niku Creative