<![CDATA[Bluetooth GATTSCharacteristic set permissions]]>Hello everyone,

I'm currently trying to setup a characteristic which only allows reading, but not writing.
In the docs https://docs.pycom.io/chapter/firmwareapi/pycom/network/bluetooth/gattsservice.html it's described that this was possible, but it's sadly not stated which are the values and how I can put them.

Does someone know more about this and can help me out?

Thanks already!

]]>https://forum.pycom.io/topic/2953/bluetooth-gattscharacteristic-set-permissionsRSS for NodeWed, 11 Mar 2026 09:36:09 GMTSat, 31 Mar 2018 21:04:40 GMT60<![CDATA[Reply to Bluetooth GATTSCharacteristic set permissions on Sat, 31 Mar 2018 21:04:40 GMT]]>Hello everyone,

I'm currently trying to setup a characteristic which only allows reading, but not writing.
In the docs https://docs.pycom.io/chapter/firmwareapi/pycom/network/bluetooth/gattsservice.html it's described that this was possible, but it's sadly not stated which are the values and how I can put them.

Does someone know more about this and can help me out?

Thanks already!

]]>https://forum.pycom.io/post/17916https://forum.pycom.io/post/17916Sat, 31 Mar 2018 21:04:40 GMT<![CDATA[Reply to Bluetooth GATTSCharacteristic set permissions on Sun, 01 Apr 2018 07:48:51 GMT]]>Got the issue sorted out myself.

The values are documented in the esp-idf: https://github.com/espressif/esp-idf/blob/master/components/bt/bluedroid/api/include/esp_gatt_defs.h#L267

just set the values corresponding to your needs. Be sure to set both permissions and properties. Example:

The below characteristic supports only READ and NOTIFY:
service.characteristic(uuid=0x2001, permissions=(1<<0), properties=(1 << 1) | (1 << 4), value=0)

]]>https://forum.pycom.io/post/17922https://forum.pycom.io/post/17922Sun, 01 Apr 2018 07:48:51 GMT