React Native app using Hive API

Sample typescript React Native app that uses the Hive heating API to display a temperature graph of actual vs target.

Overview

This is a sample react native app tested on an Android Samsung S9. The goals were:

• Check out react native
• Access a temperature graph using data from our Hive heating system
• Provide notifications if the oil fired heating has cut out

Hive

All of the hive APi has been wrapped up into a helper service hive.service.ts

Components that wish to access this can use the high order component withHiveSubscription.tsx

This will login, give access to service and fire prop changes when data is updated.

Sample use can be found in temperature-graph-screen.tsx and looks like this:

    hive.init()
      .then(()=>{
        let id = hive.getNodeId('Thermostat');
        hive.getValues(ValueType.targetTemperature, id, Operation.average, start, end.valueOf(), interval )
          .then(() => hive.getValues(ValueType.temperature, id, Operation.average, start, end.valueOf(), interval ))
          .then(() => {
            this.setState({temperaturesLoaded : true });
          })

There is also a check for the heating having cut out. For us, this can happen if the oil has run out, the optical flame sensor has become dirty.

This is carried by checking actual vs target temperatures every 20 minutes and checking for lack of heating. This is implemented in cut-out-check.ts

React Native App

The app is a pretty basic react native application tested on Android. However, it does implement many of the common patterns requried for more substantial applications. These include:

• API calls using axios
• Routing to login using different nav stacks
• Local Push notification using react-native-push-notification
• Background checks when terminated using react-native-background-fetch
• Material design using react-native-paper
• Charts using react-native-svg-charts
• Secure(ish) storage using react-native-keychain
• Navigation using react-navigation and react-navigation-material-bottom-tabs

References

Access to the Hive API inspired by the excelent articals at www.smartofthehome.com

Uses data collected from Hive home products www.hivehome.com