Getting logs from a Xiaomi Mijia Bluetooth Temp Sensor

I bought a set of Bluetooth temperature sensors of AliExpress. They work well and are dotted about the house. They are storing temp & humidity in them, and I can see this as a basic chart in the iPhone app.

My question is: is there any way to get the data out of the device and into a json of csv on my server?

TIA

Submitted by Cool_Telephone

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