Core Bluetooth Q&A

Currently we are working on an IoT Accessory for Industrial Control connecting an iPadOS to an ESP32 bridge to ModBus/CanBus using CoreBluetooth. We are concern about the Maximum Payload Size (MTU Limits) on Bluetooth as we need to send and receive long strings of ModBus/CanBus commands and responses. How to best use CoreBluetooth to ensure that the serial stream is reliable and smooth. As the Maximum Payload Size (MTU Limits) will affect the baud rate which we need to sync with the ModBus/CanBus on the other end, what techniques we can use to ensure the stable connection so that this CoreBluetooth link doesn't become a bottleneck. Are there any best practices we should be using or are we over thinking a simple Bluetooth Serial Characteristic

Core Bluetooth Classic seems to limit the number of UUIDs we can scan for. Is there a way to do a wildcard scan?

Is the PSM UUID format is less stringent than the BLE Service and Characteristic UUID? In our BLE cluster we broadcast both for different tasks... is a GATT and L2Cap mixed cluster of Apple devices ok?

Is there any software or hardware limit to the number of peripherals that can have the sounding running on at the same time? I see there are two new CBErrors, I didn't catch a reference in the video or docs for which error we get when. Can you share some details on that?

UWB is now finally on many devices that run the latest OS. To help understand availability in the field, which devices support this feature today? App Store has metrics on OS versions, but not device models. But knowing which models support it we can look in our device data.

My app includes a menu bar icon that shows the status of a bluetooth connection. How can I make this app and launch it when a user logs in? Does the launch agent need to then launch a GUI App? Can the launch agent get the permission to use bluetooth or does that require a GUI App?

I want my team to be able to take screenshots of the app to produce training and support material for our app users. Is there any way, when connected to Xcode, to influence the location and the devices that show up in the TCC prompt? I don't want a screenshot of a teammate's work remote location to land in our docs. Like if our app connects to a specific kind of sensor to have that also show up in the picker and not show 'Apple TV' and the other apple devices that are named, nearby, and frequently connected to the device. FB14768675

When I try to use encrypted notification, setNotify always fails on the central side.

Is there any way for my app when connecting normally, or through ASK, to obtain an exclusive lock against my devices? Or can I register my company identifier with Apple to only allow apps made by my company to connect to our devices? FB17823898

What is the best way for an app to deep link a user to the Bluetooth Settings page in the Settings app? For various reasons, 'go to bluetooth settings' is easier said than done for some users. I don't know of any public settings app URLs to send the users to the Bluetooth page. If using ASK it is in your apps' settings slice, but if not using ASK I don't have an answer. FB20224140