Changes for page 05 Lua Script

Last modified by Devin Chen on 2025/03/04 14:07

From 36.1 to 37.1 From 40.1 to 41.1

From version 37.1

edited by Hunter
on 2023/07/07 17:30

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To version 40.1

edited by Hunter
on 2023/07/28 10:20

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@@ -290,9 +290,241 @@
  The example shows automatically line break for long string content according to user input length.
++[[Download link>>https://ftp.we-con.com.cn/Download/WIKI/PI%20HMI/Demo/Lua%20Script/CRLF.zip]]
++
  The following are some demonstrated strings from offline simulator:
  (% style="text-align:center" %)
  [[image:WordWrapDisplayResult.png]]
--[[Download link>>https://ftp.we-con.com.cn/Download/WIKI/PI%20HMI/Demo/Lua%20Script/CRLF.zip]]
++= 16 Weather forecast HTTP API request =
++
++The example shows how to parse value from HTTP response body, and display into HMI internal address. The test forecast official website is [[https:~~/~~/www.weatherapi.com/>>url:https://www.weatherapi.com/]]
++
++[[Download link>>https://ftp.we-con.com.cn/Download/WIKI/PI%20HMI/Demo/Lua%20Script/luahttp.zip]]
++
++From the API explorer of weatherapi, the one day forecast response would be like the follows(Because the original data of JSON is very long, there we just show the part of it):
++
++{{code language="JSON"}}
++{
++    "location": {
++        "name": "London",
++        "region": "City of London, Greater London",
++        "country": "United Kingdom",
++        "lat": 51.52,
++        "lon": -0.11,
++        "tz_id": "Europe/London",
++        "localtime_epoch": 1688961236,
++        "localtime": "2023-07-10 4:53"
++    },
++    "current": {
++        "last_updated_epoch": 1688960700,
++        "last_updated": "2023-07-10 04:45",
++        "temp_c": 14.0,
++        "temp_f": 57.2,
++        "is_day": 0,
++        "condition": {
++            "text": "Partly cloudy",
++            "icon": "//cdn.weatherapi.com/weather/64x64/night/116.png",
++            "code": 1003
++        },
++        "wind_mph": 4.3,
++        "wind_kph": 6.8,
++        "wind_degree": 220,
++        "wind_dir": "SW",
++        "pressure_mb": 1020.0,
++        "pressure_in": 30.12,
++        "precip_mm": 0.0,
++        "precip_in": 0.0,
++        "humidity": 88,
++        "cloud": 50,
++        "feelslike_c": 13.3,
++        "feelslike_f": 56.0,
++        "vis_km": 10.0,
++        "vis_miles": 6.0,
++        "uv": 1.0,
++        "gust_mph": 10.5,
++        "gust_kph": 16.9
++    },
++    "forecast": {
++        "forecastday": [
++            {
++                "date": "2023-07-10",
++                "date_epoch": 1688947200,
++                "day": {
++                    "maxtemp_c": 24.4,
++                    "maxtemp_f": 75.9,
++                    "mintemp_c": 14.1,
++                    "mintemp_f": 57.4,
++                    "avgtemp_c": 19.6,
++                    "avgtemp_f": 67.2,
++                    "maxwind_mph": 15.4,
++                    "maxwind_kph": 24.8,
++                    "totalprecip_mm": 0.0,
++                    "totalprecip_in": 0.0,
++                    "totalsnow_cm": 0.0,
++                    "avgvis_km": 10.0,
++                    "avgvis_miles": 6.0,
++                    "avghumidity": 60.0,
++                    "daily_will_it_rain": 0,
++                    "daily_chance_of_rain": 0,
++                    "daily_will_it_snow": 0,
++                    "daily_chance_of_snow": 0,
++                    "condition": {
++                        "text": "Partly cloudy",
++                        "icon": "//cdn.weatherapi.com/weather/64x64/day/116.png",
++                        "code": 1003
++                    },
++                    "uv": 5.0
++                },
++                "astro": {
++                    "sunrise": "04:55 AM",
++                    "sunset": "09:16 PM",
++                    "moonrise": "12:26 AM",
++                    "moonset": "02:01 PM",
++                    "moon_phase": "Last Quarter",
++                    "moon_illumination": "51",
++                    "is_moon_up": 1,
++                    "is_sun_up": 0
++                },
++                "hour": [
++                    {
++                        "time_epoch": 1688943600,
++                        "time": "2023-07-10 00:00",
++                        "temp_c": 16.2,
++                        "temp_f": 61.2,
++                        "is_day": 0,
++                        "condition": {
++                            "text": "Clear",
++                            "icon": "//cdn.weatherapi.com/weather/64x64/night/113.png",
++                            "code": 1000
++                        },
++                        "wind_mph": 7.2,
++                        "wind_kph": 11.5,
++                        "wind_degree": 223,
++                        "wind_dir": "SW",
++                        "pressure_mb": 1021.0,
++                        "pressure_in": 30.14,
++                        "precip_mm": 0.0,
++                        "precip_in": 0.0,
++                        "humidity": 74,
++                        "cloud": 6,
++                        "feelslike_c": 16.2,
++                        "feelslike_f": 61.2,
++                        "windchill_c": 16.2,
++                        "windchill_f": 61.2,
++                        "heatindex_c": 16.2,
++                        "heatindex_f": 61.2,
++                        "dewpoint_c": 11.6,
++                        "dewpoint_f": 52.9,
++                        "will_it_rain": 0,
++                        "chance_of_rain": 0,
++                        "will_it_snow": 0,
++                        "chance_of_snow": 0,
++                        "vis_km": 10.0,
++                        "vis_miles": 6.0,
++                        "gust_mph": 10.7,
++                        "gust_kph": 17.3,
++                        "uv": 1.0
++                    },
++                    {
++                        "time_epoch": 1688947200,
++                        "time": "2023-07-10 01:00",
++                        "temp_c": 15.7,
++                        "temp_f": 60.3,
++                        "is_day": 0,
++                        "condition": {
++                            "text": "Overcast",
++                            "icon": "//cdn.weatherapi.com/weather/64x64/night/122.png",
++                            "code": 1009
++                        },
++                        "wind_mph": 7.2,
++                        "wind_kph": 11.5,
++                        "wind_degree": 232,
++                        "wind_dir": "SW",
++                        "pressure_mb": 1021.0,
++                        "pressure_in": 30.14,
++                        "precip_mm": 0.0,
++                        "precip_in": 0.0,
++                        "humidity": 75,
++                        "cloud": 100,
++                        "feelslike_c": 15.7,
++                        "feelslike_f": 60.3,
++                        "windchill_c": 15.7,
++                        "windchill_f": 60.3,
++                        "heatindex_c": 15.7,
++                        "heatindex_f": 60.3,
++                        "dewpoint_c": 11.3,
++                        "dewpoint_f": 52.3,
++                        "will_it_rain": 0,
++                        "chance_of_rain": 0,
++                        "will_it_snow": 0,
++                        "chance_of_snow": 0,
++                        "vis_km": 10.0,
++                        "vis_miles": 6.0,
++                        "gust_mph": 10.5,
++                        "gust_kph": 16.9,
++                        "uv": 1.0
++                    },
++                   ...
++                    {
++                        "time_epoch": 1689026400,
++                        "time": "2023-07-10 23:00",
++                        "temp_c": 19.0,
++                        "temp_f": 66.2,
++                        "is_day": 0,
++                        "condition": {
++                            "text": "Overcast",
++                            "icon": "//cdn.weatherapi.com/weather/64x64/night/122.png",
++                            "code": 1009
++                        },
++                        "wind_mph": 9.4,
++                        "wind_kph": 15.1,
++                        "wind_degree": 192,
++                        "wind_dir": "SSW",
++                        "pressure_mb": 1015.0,
++                        "pressure_in": 29.96,
++                        "precip_mm": 0.0,
++                        "precip_in": 0.0,
++                        "humidity": 66,
++                        "cloud": 100,
++                        "feelslike_c": 19.0,
++                        "feelslike_f": 66.2,
++                        "windchill_c": 19.0,
++                        "windchill_f": 66.2,
++                        "heatindex_c": 19.0,
++                        "heatindex_f": 66.2,
++                        "dewpoint_c": 12.4,
++                        "dewpoint_f": 54.3,
++                        "will_it_rain": 0,
++                        "chance_of_rain": 0,
++                        "will_it_snow": 0,
++                        "chance_of_snow": 0,
++                        "vis_km": 10.0,
++                        "vis_miles": 6.0,
++                        "gust_mph": 13.0,
++                        "gust_kph": 20.9,
++                        "uv": 1.0
++                    }
++                ]
++            }
++        ]
++    }
++}
++{{/code}}
++
++The core code is from file API_WEATHER.lua, and function name is get7DayWeatherapiByCityname.
++
++(% style="text-align:center" %)
++[[image:WeatherHTTPAPI.png]]
++
++The HMI offline simulator result:
++
++(% style="text-align:center" %)
++[[image:WeatherHTTPtestdisplay.png]]
++
++= 17 **CSV File Reading** =
++
++The example shows how to read the csv file into HMI, and then display as table.
++
++[[Download link>>https://ftp.we-con.com.cn/Download/WIKI/PI%20HMI/Demo/Lua%20Script/csvRead.zip]]

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