node-red-contrib-discovergy-meter/lib/discovergy.js

Allows to work with a Discovergy Smart Meter (Electricity only) within Node RED flows

const axios = require("axios");

module.exports = {
  last_reading: async function(meterId,node) {
        const sleep = function (ms) {
              return new Promise(resolve => setTimeout(resolve, ms));
          }
        let responds = {};
        let res = null;

        while(res == null)  {
          try {
            responds = await axios.get("https://api.discovergy.com/public/v1/last_reading?meterId="+meterId,{
                         auth: {
                           username: node.config.credentials.username,
                           password: node.config.credentials.password
                       }});
          } catch(e) {
            console.warn("API Request failed:last_reading","https://api.discovergy.com/public/v1/last_reading?meterId="+meterId);
            await sleep(2000);
            res = null;
          }
          if(typeof responds.data !== 'undefined') {
            res=responds.data;
          } else {
            console.warn('Invalid Consensus with backend API');
            await sleep(2000);
            res = null;
          }
        }
        return res;
  },
  historicReading: async function(meterId,resolution,from,to,node) {
    try {
      let responds = await axios.get("https://api.discovergy.com/public/v1/readings?meterId="+meterId+"&resolution="+resolution+"&from="+from+"&to="+to,{
                 auth: {
                   username: node.credentials.username,
                   password: node.credentials.password
      }});
      return responds.data;
    } catch(e) {
      return {};
    }
  },
  meters: async function(node) {
    try {
      let meters = await axios.get("https://api.discovergy.com/public/v1/meters",{
                     auth: {
                       username: node.config.credentials.username,
                       password: node.config.credentials.password
      }});
      return meters.data;
    } catch(e) {
      return [];
    }
  }
};