TypeError: Undefined is not and object(Evaluating 'nativeModule.addListener).

[omi10859]

code causing error:

componentDidMount(){
Proximity.addListener(this._proximityListener);
 }
_proximityListener(data) {
    console.log(data);
}
componentWillUnmount() {
  Proximity.removeListener(this._proximityListener);
}

[embirico]

This type of error often means you need to properly link the library and then rebuild in XCode.