bitstrong Bluetooth temperature logger/temperature and humidity logger with smartphone app connectivity.

This is a wireless temperature and humidity logger that supports Bluetooth communication.
Data recorded on the device can be viewed via Bluetooth using a smartphone app.
We offer two types of temperature data loggers: one with a temperature range of -20 to +70°C, and another with a temperature range of -20 to +70°C and a humidity range of 0 to 100%RH.
Multiple data loggers can be managed with a single smartphone, allowing for centralized management of temperature and humidity data from various locations within a room.
You can use apps compatible with Android and iOS.
You can export and save the data in CSV format from the smartphone app.