How does GATT as broadcast without works without connection?

[Salman]

How does Broadcast characteristic property of GATT can allow BLE observers devices to read the data without being connected with the device? Does this mean we share data without being connected to the central? 

Source: https://embeddedcentric.com/lesson-2-ble-profiles-services-characteristics-device-roles-and-network-topology/

[Edvin]

Hello,

I can't be sure, but I assume they are only talking about advertisements in general. In the Nordic SDK, you must update the advertising packets in the application every time you want to change something. It is perfectly possible to do this every time you update one of your characteristics as well, but it is not a built in solution in the softdevice.