json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "title": "CTT Sensor Reception Schema",
      "type": "object",
      "properties": {
          "eui": {
              "type": "string"
          },
          "metadata": {
              "type": "object",
              "properties": {
                  "gateway_eui": {
                      "type": "string"
                  },
                  "server_time": {
                      "type": "string"
                  },
                  "datarate": {
                      "type": "string"
                  },
                  "frequency": {
                      "type": "number"
                  },
                  "rssi": {
                      "type": "integer"
                  },
                  "lsnr": {
                      "type": "integer"
                  },
                  "codingrate": {
                      "type": "string"
                  },
                  "modulation": {
                      "type": "string"
                  },
                  "channel": {
                      "type": "integer"
                  },
                  "rfchain": {
                      "type": "integer"
                  },
                  "crc": {
                      "type": "integer"
                  },
                  "altitude": {
                      "type": "integer"
                  },
                  "longitude": {
                      "type": "number"
                  },
                  "latitude": {
                      "type": "number"
                  }
              },
              "required": [
                  "gateway_eui",
                  "server_time",
                  "datarate",
                  "frequency",
                  "rssi",
                  "lsnr",
                  "codingrate",
                  "modulation",
                  "channel",
                  "rfchain",
                  "crc",
                  "altitude",
                  "longitude",
                  "latitude"
              ]
          },
          "data": {
              "type": "object",
              "properties": {
                  "co2": {
                      "type": "number"
                  },
                  "no2": {
                      "type": "integer"
                  },
                  "temperature": {
                      "type": "number"
                  },
                  "humidity": {
                      "type": "number"
                  },
                  "pressure": {
                      "type": "number"
                  },
                  "pm1": {
                      "type": "integer"
                  },
                  "pm2": {
                      "type": "integer"
                  },
                  "pm10": {
                      "type": "integer"
                  },
                  "batteryLevel": {
                      "type": "integer"
                  }
              },
              "required": [
                  "co2",
                  "no2",
                  "temperature",
                  "humidity",
                  "pressure",
                  "batteryLevel"
              ]
          }
      },
      "required": [
          "eui",
          "metadata",
          "data"
      ]
  }