Kamshory, MT
You can not do it to the device but you can do it from your application.
No. You must read all data because library not support filter data
first, you must read your data from your device then save it into you database. second, you can read data from your database as you want.
I don't believe it can. But you can make it on the application.
I just develop MIDI to Music XML on https://github.com/kamshory/PHPMusicXML but not ready yet. Music duration longer than expected.
For simple music, https://github.com/kamshory/PHPMusicXML can convert music from MIDI to MusicXML.
There is no function to update user. But you can do it manually: 1. get all user data 2. select the specify user 3. delete the specify user 4. create...
I put the PubSubClient:connect on separated task (multitasking) and it works for me My repo is https://github.com/kamshory/OTP-Mini