• Make sure your whitelist option in settings app is empty, I once forgot that I setup a whitelist for mac address. Also make sure programmable is true. Double check those settings under bluetooth inside your bangle. These problems are often something silly.

    Also, you should try entering DFU targ mode and see if the NRF DFU app from play store can connect to it, I mean simulate a firmware update. This would test the hardware is working fine still.


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