How can I set the localtime of the polar with uuids?

[Arthur-HITLab]

Platform your question concerns:

• [ ] Android
• [ ] iOS
• [x] Other
• [ ] Platform is not relevant for this question

Device:

• [ ] Polar OH1
• [ ] Polar Verity Sense
• [x] Polar H10
• [ ] Polar H9
• [ ] Other
• [ ] Device is not relevant for this question

Description: I'm writing a simple ECG recorder in python using the bleak library. I can get the ECG data by writing to the PMD service. To get accurate timestamps I want to set the local time on the polar. However using the the raw uuids I get the error that the ble attribute to read the current local time needs authentication. I can write to RFC77_PFTP_MTU_CHARACTERISTIC to ask for the current time but not subscribe on RFC77_PFTP_D2H_CHARACTERISTIC to receive it.

[Arthur-HITLab]

I found out why, I had to call client.pair() before subscribing on the UUID.