Changes for page 05 Lua Script

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

From 23.1 to 24.1 From 39.1 to 40.1

From version 24.1

edited by Hunter
on 2023/03/01 12:01

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To version 39.1

edited by Hunter
on 2023/07/10 14:03

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@@ -229,13 +229,296 @@
  = **11 High-Low Byte Switch** =
--**{{code language="Lua"}}local lowByte = val & 0x00ff
----take the lower 8 bits from address
--local shiftHigh = lowByte << 8
----left shift 8 bits
--local highByte = val & 0xff00
----take the higher 8 bits from address
--local shiftLow = highByte >> 8
----right shift 8 bits
--local newVal = shiftHigh|shiftLow
----bit or calculation{{/code}}**
++The example shows how to convert high bytes and low bytes for one 16bit address. Main function is like following:
++
++{{code language="lua"}}
++local lowByte = val & 0x00ff
++local shiftHigh = lowByte << 8
++local highByte = val & 0xff00
++local shiftLow = highByte >> 8
++local newVal = shiftHigh|shiftLow
++{{/code}}
++
++[[Download link>>https://ftp.we-con.com.cn/Download/WIKI/PI%20HMI/Demo/Lua%20Script/byteswitch.zip]]
++
++= **12 Week time setting** =
++
++The example shows how to use day time to control functions:
++
++[[Download link>>https://ftp.we-con.com.cn/Download/WIKI/PI%20HMI/Demo/Lua%20Script/week%20time.zip]]
++
++= **13 MQTT Multi-link** =
++
++The example shows use mqtt realize multi-machine function：
++
++[[Download link>>https://ftp.we-con.com.cn/Download/WIKI/PI%20HMI/Demo/Lua%20Script/MQTT%20Multi-link.zip]]
++
++= **14 CSV File Generation** =
++
++The example shows convert the custom lua table data into csv string, then output as a file:
++
++[[Download link>>https://ftp.we-con.com.cn/Download/WIKI/PI%20HMI/Demo/Lua%20Script/csvGenerate.zip]]
++
++The following steps take HMI simulator as example:
++
++~1. Click button "Create Table" to draw lua table in screen.
++
++(% style="text-align:center" %)
++[[image:csvGenerateSteps.png]]
++
++2. Click button "Save as csv" to save the file into HMI storage path. On the HMI simulator, user can enter the simulation path of U disk to check the file whether create successfully.
++
++(% style="text-align:center" %)
++[[image:csvGenerateSimulationPath.png]]
++
++3. Click button "upload" to upload csv file into server side. In this case, we can check the upload path for PC.
++
++(% style="text-align:center" %)
++[[image:csvGenerateServerPath.png]]
++
++The csv file generation is mainly using the following function to implement, the customized data is argument tab, and csv file storage path in HMI is "udisk:weather1.csv":
++
++(% style="text-align:center" %)
++[[image:csvGenerateLuaCode.png]]
++
++The table drawing is mainly using the following function to implement:
++
++(% style="text-align:center" %)
++[[image:csvLuaTableDrawing.png]]
++
++= 15 **String customized length word-wrapped** =
++
++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]]
++
++= 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]]

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