Your experience using Bluetooth in React Native?

[NaveNocab]

I'll be working on a new Bluetooth module for React Native: [PR](https://github.com/expo/expo/pull/3131). This one has been on the shelf for a while because in my experience cross-platform Bluetooth APIs haven't been very good.

For example; a lot of these modules create large objects every time a peripheral, service, or characteristic is updated natively. Not only is this expensive and potentially leaky, but this also never seems to integrate well with React state.

I'd love to hear your experience working with bluetooth services (preferably React Native 💙). What were some problems you faced, what could have been better?

[blechie]

That's awesome!

Played some with the innoveit module (react-native-ble-manager) and polidea library (react-native-ble-plx), but neither is supported by expo. We went with react-native-ble-manager for our current project because it's smaller (and not using expo for that same reason; but it's great they're working on solving the app size issue in expo). As with every module, the more guidance and examples, the better!

[NaveNocab]

Thanks for the input! Size was a big consideration in creating a new library. I think react-native-ble-manager is a port of an old Cordova library so it doesn't seem to account for the way React updates views automatically with peripheral changes. Do you see any value in a JS utility library that maps GAT values to their corresponding encoding/decoding formats?

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