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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@user156416
I've been wanting to use the whitelist with my Bangle as I don't particularly like leaving my devices unsecured. I am aware of the pin option but I would like to make the whitelist work. I've noticed people mention having issues on Android devices due to the apparently randomized MAC addresses. I have found the proper way to add these addresses to the whitelist but the bond info seems to be lost when the watch is turned off (through Settings>Utils>Turn Off)
My Android uses private resolvable addresses when connecting with Bangle.JS Gadgetbridge (nRF Connect seems to use my real public address, so the privacy option seems to be per app?). Private resolvable addresses can be resolved by bonded devices to obtain the public address.
If you bond to the Bangle while the whitelist is OFF, the Bangle can now resolve the addresses. You can now add your device to the whitelist by disconnecting (NOT removing the bond), selecting "Add Device", and connecting by tapping the Bangle card in Gadgetbridge.
Tapping the new whitelist entry you should see "XX:XX:XX:XX:XX:XX public (resolved)" with your unchanging public address. You can now connect and disconnect from the Bangle any number of times with the whitelist on as long as you don't turn it off.
Adding to the whitelist without bonding first will result in "XX:XX:XX:XX:XX:XX private-resolvable" being added to the list with a randomized address, as the Bangle does not have the IRK needed to resolve the public address.
I usually turn my Bangle off when it's off my wrist. I confirmed that the Bangle is unable to resolve addresses after a reboot by writing down and trying to resolve one of my phone's generated public-resolvable addresses using NRF.resolveAddress(). Before the reboot it resolves fine, but after the reboot it returns undefined meaning the address cannot be resolved.
I am not entirely sure, but this seems like it could be a firmware issue with the Nordic Peer Manager not successfully storing or loading bond keys and information from flash.