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royc

Rank: 2Rank: 2
11# 跳轉到 »
發表於 2021-6-10 11:10 | 只看該作者
今日得閒繼續玩，上天文台搵埋濕度/溫度放入個 Display。本來還想搵埋酷熱/寒冷/火災/暴雨/風球之類的警告 ...
C_Law 發表於 2021-6-5 17:30

師兄請教一下，小弟正想試下整個香港地區溫度，用你上面個天文台api。
請問有冇參考連結例程可以用到香港地區data,改小小就用得。我用D1mini的

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via HKEPC IR Pro 3.6.1 - iOS(3.0.0)

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C_Law

Rank: 3Rank: 3Rank: 3
12#
發表於 2021-6-13 01:57 | 只看該作者
本帖最後由 C_Law 於 2021-6-13 02:35 編輯
師兄請教一下，小弟正想試下整個香港地區溫度，用你上面個天文台api。
請問有冇參考連結例程可以用到香港 ...
royc 發表於 2021/6/10 11:10


以下係我玩緊個鐘的部份 Code，可以用 rhrread 搵到：
閃電
分區氣溫
天文台濕度

以及用 warnsum 搵到
風球
紅黑黃雨
雷暴警告
寒冷/酷熱警告
紅/黃火災警告

上載到 ESP8266 前要先修改 PortNo, WiFi 的 SSID/PASSWORD。
Oooops~~~~這裡貼 Code 自動幫我刪除了一部份斜楝！照抄以下出來用係會錯，等我諗諗再 Post 過。
(好似改返正)
  1. #ifndef UNIT_TEST
  2. #include <Arduino.h>
  3. #endif
  4. #include <ESP8266WiFi.h>
  5. #include <ESP8266WiFiMulti.h>
  6. #include <ESP8266WebServer.h>
  7. #include <ESP8266mDNS.h>
  8. #include <WiFiClient.h>
  9. #include <ESP8266HTTPClient.h>

  11. // some parameters used for WiFi
  12. const unsigned int PortNo = 80;
  13. const char* SSID1 = "yourSSID1";               // SSID and Password for WiFi connection
  14. const char* PW1 = "yourPASSWORD1";
  15. const char* SSID2 = "yourSSID2";
  16. const char* PW2 = "yourPASSWORD2";
  17. const char* SSID3 = "yourSSID3";
  18. const char* PW3 = "yourPASSWORD3";

  20. const uint16_t LED = 2;       // OnChipLED(Pull_Up)=D4 for D1 mini
  21. const bool LEDon = false;     // false for Pull_Up, otherwise true

  23. // some variables for weather
  24. String weatherJSON;
  25. String TempC;
  26. String MaxMinTempC;
  27. String HumPercent;
  28. String WTCSGNL;  // Tropical Cyclone Warning Signal: None, TC1, TC3, TC8xx, TC9, TC10
  29. bool Lightning;
  30. bool WTS = false; //Thunderstorm warning
  31. int wFire;  // Fire warning: 0,1,2=Normal, Yellow, Red
  32. int wCH;    // Cold/Hot warning: 0,1,2,=Normal,Cold,Hot
  33. int wRAIN;  // Rain warning: 0,1,2,3=None,Amber,Red,Black

  35. ESP8266WiFiMulti wifiMulti;
  36. ESP8266WebServer server(PortNo);

  38. void setup() {
  39.   pinMode(LED, OUTPUT);
  40.   digitalWrite(LED, LEDon);
  41.   
  42.   Serial.begin(115200);
  43.   Serial.println("");
  44.   
  45.   WiFi.mode(WIFI_STA);
  46.   wifiMulti.addAP(SSID1, PW1);
  47.   wifiMulti.addAP(SSID2, PW2);
  48.   wifiMulti.addAP(SSID3, PW3);
  49.   
  50.   // waiting for WiFi connection
  51.   while (wifiMulti.run() != WL_CONNECTED) {
  52.     delay(500);
  53.   }
  54.   
  55.   Serial.println("");
  56.   Serial.print("Connected to: ");
  57.   Serial.println(WiFi.SSID());
  58.   Serial.print("IP address: ");
  59.   Serial.println(WiFi.localIP().toString());
  60.   Serial.print("Port no.: ");
  61.   Serial.println(PortNo);
  62.   digitalWrite(LED, !LEDon);
  63.   
  64.   server.on("/", handleRoot);
  65.   server.on("/rhrread", handleRhrread);
  66.   server.on("/warnsum", handleWarnSum);
  67.   server.on("/rhrread2", handleRhrread2);
  68.   server.on("/warnsum2", handleWarnSum2);
  69.   server.onNotFound(handleNotFound);
  70.   server.begin();
  71. }

  73. void loop() {
  74.   server.handleClient();
  75. }

  77. void handleRoot() {
  78.   String message = "";
  79.   message = "<HTML>\n" \
  80.             "  <HEAD>\n" \
  81.             "    <TITLE>Get weather information by ESP8266</TITLE>\n" \
  82.             "  </HEAD>\n" \
  83.             "  <body>\n" \
  84.             "    Get weather information by ESP8266<p>\n";
  85.   message += "  </body>\n" \
  86.              "</HTLM>";
  87.   server.send(200, "text/html", message);
  88. }

  90. void handleRhrread() {
  91.   String message = "";
  92.   if (GetJson("rhrread")){
  93.     int StartPos = 0;
  94.     int EndPos = weatherJSON.length() - 1;
  95.     int ResultStart = 0;
  96.     int ResultEnd = EndPos;
  97.     String sTemp;
  98.     String Location;
  99.     message = weatherJSON;
  100.         
  101.     // Get Lightning warning for "Hong Kong and Kowloon"
  102.     Location = "Hong Kong and Kowloon";
  103.     StartPos = 0;
  104.     EndPos = weatherJSON.length() - 1;
  105.     ResultStart = StartPos;
  106.     ResultEnd = EndPos;
  107.     Lightning = false;
  108.     if (GetJsonRange("\"lightning\":{", "]", StartPos, EndPos, &ResultStart, &ResultEnd)){
  109.       StartPos = ResultStart;
  110.       EndPos = ResultEnd;
  111.       if (GetJsonRange("\"" + Location + "\",\"occur\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  112.         Lightning = (weatherJSON.substring(ResultStart, ResultEnd) == "true");
  113.       }
  114.     }
  115.     message += "\n\rLightning=";
  116.     if (Lightning) message += "true";
  117.     else message += "false";
  118.    
  119.     // Get "Kowloon City" temperture
  120.     Location = "Kowloon City";
  121.     StartPos = 0;
  122.     EndPos = weatherJSON.length() - 1;
  123.     TempC = "";
  124.     if (GetJsonRange("\"temperature\":{\"data\":[", "]", StartPos, EndPos, &ResultStart, &ResultEnd)){
  125.       StartPos = ResultStart;
  126.       EndPos = ResultEnd;
  127.       if (GetJsonRange("\"" + Location + "\",\"value\":", ",", StartPos, EndPos, &ResultStart, &ResultEnd)){
  128.         TempC = weatherJSON.substring(ResultStart, ResultEnd) + "C";
  129.       }
  130.     }
  131.     message += "\n\rTempC=" + TempC;
  132.    
  133.     // Get Humidity
  134.     StartPos = 0;
  135.     EndPos = weatherJSON.length() - 1;
  136.     ResultStart = StartPos;
  137.     ResultEnd = EndPos;
  138.     if (GetJsonRange("\"humidity\":{", "]", StartPos, EndPos, &ResultStart, &ResultEnd)){
  139.       StartPos = ResultStart;
  140.       EndPos = ResultEnd;
  141.       if (GetJsonRange("\"value\":", ",", StartPos, EndPos, &ResultStart, &ResultEnd)){
  142.         HumPercent = weatherJSON.substring(ResultStart, ResultEnd) + "%";
  143.       }
  144.     }
  145.     message += "\n\rHumidity=" +HumPercent;
  146.   }
  147.   
  148.   server.send(200, "text/plain", message);
  149. }

  151. void handleRhrread2() {
  152.   String message = "";
  153.   if (true){
  154.     weatherJSON = "{\"lightning\":{\"data\":[{\"place\":\"Lantau\",\"occur\":\"true\"},{\"place\":\"Hong Kong and Kowloon\",\"occur\":\"true\"}],\"startTime\":\"2021-06-11T18:45:00+08:00\",\"endTime\":\"2021-06-11T19:45:00+08:00\"},\"rainfall\":{\"data\":[{\"unit\":\"mm\",\"place\":\"Central &amp; Western District\",\"max\":9,\"min\":1,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Eastern District\",\"max\":8,\"min\":1,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Kwai Tsing\",\"max\":2,\"min\":0,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Islands District\",\"max\":12,\"min\":0,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"North District\",\"max\":0,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Sai Kung\",\"max\":0,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Sha Tin\",\"max\":1,\"min\":0,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Southern District\",\"max\":15,\"min\":7,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Tai Po\",\"max\":1,\"min\":0,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Tsuen Wan\",\"max\":2,\"min\":0,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Tuen Mun\",\"max\":3,\"min\":0,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Wan Chai\",\"max\":10,\"min\":5,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Yuen Long\",\"max\":2,\"min\":0,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Yau Tsim Mong\",\"max\":4,\"min\":0,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Sham Shui Po\",\"max\":2,\"min\":1,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Kowloon City\",\"max\":1,\"min\":0,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Wong Tai Sin\",\"max\":0,\"main\":\"FALSE\"},{\"unit\":\"mm\",\"place\":\"Kwun Tong\",\"max\":1,\"min\":0,\"main\":\"FALSE\"}],\"startTime\":\"2021-06-11T18:45:00+08:00\",\"endTime\":\"2021-06-11T19:45:00+08:00\"},\"icon\":[64],\"iconUpdateTime\":\"2021-06-11T20:25:00+08:00\",\"uvindex\":\"\",\"updateTime\":\"2021-06-11T20:26:00+08:00\",\"temperature\":{\"data\":[{\"place\":\"King's Park\",\"value\":27,\"unit\":\"C\"},{\"place\":\"Hong Kong Observatory\",\"value\":28,\"unit\":\"C\"},{\"place\":\"Wong Chuk Hang\",\"value\":28,\"unit\":\"C\"},{\"place\":\"Ta Kwu Ling\",\"value\":29,\"unit\":\"C\"},{\"place\":\"Lau Fau Shan\",\"value\":28,\"unit\":\"C\"},{\"place\":\"Tai Po\",\"value\":29,\"unit\":\"C\"},{\"place\":\"Sha Tin\",\"value\":29,\"unit\":\"C\"},{\"place\":\"Tuen Mun\",\"value\":27,\"unit\":\"C\"},{\"place\":\"Tseung Kwan O\",\"value\":27,\"unit\":\"C\"},{\"place\":\"Sai Kung\",\"value\":29,\"unit\":\"C\"},{\"place\":\"Cheung Chau\",\"value\":26,\"unit\":\"C\"},{\"place\":\"Chek Lap Kok\",\"value\":27,\"unit\":\"C\"},{\"place\":\"Tsing Yi\",\"value\":29,\"unit\":\"C\"},{\"place\":\"Shek Kong\",\"value\":28,\"unit\":\"C\"},{\"place\":\"Tsuen Wan Ho Koon\",\"value\":26,\"unit\":\"C\"},{\"place\":\"Tsuen Wan Shing Mun Valley\",\"value\":28,\"unit\":\"C\"},{\"place\":\"Hong Kong Park\",\"value\":27,\"unit\":\"C\"},{\"place\":\"Shau Kei Wan\",\"value\":27,\"unit\":\"C\"},{\"place\":\"Kowloon City\",\"value\":28,\"unit\":\"C\"},{\"place\":\"Happy Valley\",\"value\":28,\"unit\":\"C\"},{\"place\":\"Wong Tai Sin\",\"value\":28,\"unit\":\"C\"},{\"place\":\"Stanley\",\"value\":27,\"unit\":\"C\"},{\"place\":\"Kwun Tong\",\"value\":27,\"unit\":\"C\"},{\"place\":\"Sham Shui Po\",\"value\":28,\"unit\":\"C\"},{\"place\":\"Kai Tak Runway Park\",\"value\":28,\"unit\":\"C\"},{\"place\":\"Yuen Long Park\",\"value\":29,\"unit\":\"C\"},{\"place\":\"Tai Mei Tuk\",\"value\":29,\"unit\":\"C\"}],\"recordTime\":\"2021-06-11T20:00:00+08:00\"},\"warningMessage\":[\"The Tropical Cyclone Signal No. 1 has been issued.\",\"The Amber Rainstorm Warning Signal was issued at 8:25 p.m.\",\"The Thunderstorm Warning has been issued. It will remain effective until 11:00 p.m. today. Occasional thunderstorms are expected to occur over Hong Kong.\"],\"mintempFrom00To09\":\"\",\"rainfallFrom00To12\":\"\",\"rainfallLastMonth\":\"\",\"rainfallJanuaryToLastMonth\":\"\",\"tcmessage\":[\"Here is the information on Tropical Depression:\nLocation: 18.3 degrees north, 112.3 degrees east; Maximum sustained wind near its centre: 45 km\/h.\"],\"humidity\":{\"recordTime\":\"2021-06-11T20:00:00+08:00\",\"data\":[{\"unit\":\"percent\",\"value\":88,\"place\":\"Hong Kong Observatory\"}]}}";
  155.     int StartPos = 0;
  156.     int EndPos = weatherJSON.length() - 1;
  157.     int ResultStart = 0;
  158.     int ResultEnd = EndPos;
  159.     String sTemp;
  160.     String Location;
  161.     message = weatherJSON;
  162.         
  163.     // Get Lightning warning for "Hong Kong and Kowloon"
  164.     Location = "Hong Kong and Kowloon";
  165.     StartPos = 0;
  166.     EndPos = weatherJSON.length() - 1;
  167.     ResultStart = StartPos;
  168.     ResultEnd = EndPos;
  169.     Lightning = false;
  170.     if (GetJsonRange("\"lightning\":{", "]", StartPos, EndPos, &ResultStart, &ResultEnd)){
  171.       StartPos = ResultStart;
  172.       EndPos = ResultEnd;
  173.       if (GetJsonRange("\"" + Location + "\",\"occur\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  174.         Lightning = (weatherJSON.substring(ResultStart, ResultEnd) == "true");
  175.       }
  176.     }
  177.     message += "\n\rLightning=";
  178.     if (Lightning) message += "true";
  179.     else message += "false";
  180.    
  181.     // Get "Kowloon City" temperture
  182.     Location = "Kowloon City";
  183.     StartPos = 0;
  184.     EndPos = weatherJSON.length() - 1;
  185.     TempC = "";
  186.     if (GetJsonRange("\"temperature\":{\"data\":[", "]", StartPos, EndPos, &ResultStart, &ResultEnd)){
  187.       StartPos = ResultStart;
  188.       EndPos = ResultEnd;
  189.       if (GetJsonRange("\"" + Location + "\",\"value\":", ",", StartPos, EndPos, &ResultStart, &ResultEnd)){
  190.         TempC = weatherJSON.substring(ResultStart, ResultEnd) + "C";
  191.       }
  192.     }
  193.     message += "\n\rTempC=" + TempC;
  194.    
  195.     // Get Humidity
  196.     StartPos = 0;
  197.     EndPos = weatherJSON.length() - 1;
  198.     ResultStart = StartPos;
  199.     ResultEnd = EndPos;
  200.     if (GetJsonRange("\"humidity\":{", "]", StartPos, EndPos, &ResultStart, &ResultEnd)){
  201.       StartPos = ResultStart;
  202.       EndPos = ResultEnd;
  203.       if (GetJsonRange("\"value\":", ",", StartPos, EndPos, &ResultStart, &ResultEnd)){
  204.         HumPercent = weatherJSON.substring(ResultStart, ResultEnd) + "%";
  205.       }
  206.     }
  207.     message += "\n\rHumidity=" +HumPercent;
  208.   }
  209.   
  210.   server.send(200, "text/plain", message);
  211. }

  213. void handleWarnSum() {
  214.   String message ="";
  215.   if (GetJson("warnsum")) {
  216.     int StartPos = 0;
  217.     int EndPos = weatherJSON.length() - 1;
  218.     int ResultStart = 0;
  219.     int ResultEnd = EndPos;
  220.     String sTemp;
  221.    
  222.     // Check WRAIN
  223.     wRAIN = 0;
  224.     if (GetJsonRange("\"WRAIN\":{", "}", StartPos, EndPos, &ResultStart, &ResultEnd)){
  225.       StartPos = ResultStart;
  226.       EndPos = ResultEnd;
  227.       if (GetJsonRange("\"actionCode\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  228.         sTemp = weatherJSON.substring(ResultStart, ResultEnd);
  229.         if ((sTemp != "CANCEL") && (GetJsonRange("\"code\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd))){
  230.           sTemp = weatherJSON.substring(ResultStart, ResultEnd);
  231.           if (sTemp == "WRAINA") wRAIN = 1;
  232.           else if (sTemp == "WRAINR") wRAIN = 2;
  233.           else if (sTemp == "WRAINB") wRAIN = 3;
  234.         }
  235.       }
  236.     }
  237.     message = "\n\r\n\rwRAIN=";
  238.     message += wRAIN;
  239.    
  240.     // Check Thunderstorm warning WTS
  241.     StartPos = 0;
  242.     EndPos = weatherJSON.length() - 1;
  243.     WTS = false;
  244.     if (GetJsonRange("\"WTS\":{", "}", StartPos, EndPos, &ResultStart, &ResultEnd)){
  245.       StartPos = ResultStart;
  246.       EndPos = ResultEnd;
  247.       
  248.       if (GetJsonRange("\"actionCode\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  249.         sTemp = weatherJSON.substring(ResultStart, ResultEnd);
  250.         if (sTemp != "CANCEL") WTS = true;
  251.       }
  252.     }
  253.     message += "\n\rWTS=";
  254.     if (WTS) message += "true";
  255.     else message += "false";
  256.    
  257.     // Check Tropical Cyclone Warning Signal WTCSGNL
  258.     StartPos = 0;
  259.     EndPos = weatherJSON.length() - 1;
  260.     WTCSGNL = "None";
  261.     if (GetJsonRange("\"WTCSGNL\":{\"", "}", StartPos, EndPos, &ResultStart, &ResultEnd)){
  262.       StartPos = ResultStart;
  263.       EndPos = ResultEnd;
  264.       if (GetJsonRange("\"actionCode\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  265.         if (weatherJSON.substring(ResultStart, ResultEnd) != "CANCEL") {
  266.           if (GetJsonRange("\"code\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  267.             WTCSGNL = weatherJSON.substring(ResultStart, ResultEnd);
  268.           }
  269.         }
  270.       }
  271.     }
  272.     message += "\n\rWTCSGNL=" + WTCSGNL;
  273.    
  274.     // Check WHOT
  275.     wCH = 0;
  276.     StartPos = 0;
  277.     EndPos = weatherJSON.length() - 1;
  278.     if (GetJsonRange("\"WHOT\":{\"", "}", StartPos, EndPos, &ResultStart, &ResultEnd)){
  279.       StartPos = ResultStart;
  280.       EndPos = ResultEnd;
  281.       if (GetJsonRange("\"actionCode\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  282.         if (weatherJSON.substring(ResultStart, ResultEnd) != "CANCEL") wCH = 2;
  283.       }
  284.     }
  285.    
  286.     // Check WCOLD
  287.     StartPos = 0;
  288.     EndPos = weatherJSON.length() - 1;
  289.     // wCH already reset before WHOT check, no need to reset in here
  290.     if (GetJsonRange("\"COLD\":{\"", "}", StartPos, EndPos, &ResultStart, &ResultEnd)){
  291.       StartPos = ResultStart;
  292.       EndPos = ResultEnd;
  293.       if (GetJsonRange("\"actionCode\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  294.         if (weatherJSON.substring(ResultStart, ResultEnd) != "CANCEL") wCH = 1;
  295.       }
  296.     }
  297.     message += "\n\rwCH=";
  298.     message += wCH;
  299.    
  300.     // Get WFIRE
  301.     StartPos = 0;
  302.     EndPos = weatherJSON.length() - 1;
  303.     wFire = 0;
  304.     if (GetJsonRange("\"WFIRE\":{\"", "}", StartPos, EndPos, &ResultStart, &ResultEnd)){
  305.       StartPos = ResultStart;
  306.       EndPos = ResultEnd;
  307.       if (GetJsonRange("\"actionCode\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  308.         if (weatherJSON.substring(ResultStart, ResultEnd) != "CANCEL") {
  309.           if (GetJsonRange("\"code\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  310.             sTemp = weatherJSON.substring(ResultStart, ResultEnd);
  311.             if (sTemp == "WFIREY") wFire = 1;      // yellow
  312.             else if (sTemp == "WFIRER") wFire = 2; // red
  313.           }
  314.         }
  315.       }
  316.     }
  317.     message += "\n\rwFire=";
  318.     message += wFire;
  319.   }
  320.   
  321.   message = weatherJSON + message;
  322.   server.send(200, "text/plain", message);
  323. }

  325. void handleWarnSum2() {
  326.   String message ="";
  327.   if (true) {
  328.     weatherJSON = "{\"WRAIN\":{\"name\":\"Rainstorm Warning Signal\",\"code\":\"WRAINA\",\"type\":\"Amber\",\"actionCode\":\"ISSUE\",\"issueTime\":\"2021-06-11T20:25:00+08:00\",\"updateTime\":\"2021-06-11T20:25:00+08:00\"},\"WTS\":{\"name\":\"Thunderstorm Warning\",\"code\":\"WTS\",\"actionCode\":\"UPDATE\",\"issueTime\":\"2021-06-11T18:35:00+08:00\",\"expireTime\":\"2021-06-11T23:00:00+08:00\",\"updateTime\":\"2021-06-11T21:10:00+08:00\"},\"WTCSGNL\":{\"name\":\"Tropical Cyclone Warning Signal\",\"code\":\"TC1\",\"actionCode\":\"ISSUE\",\"type\":\"Standby Signal No. 1\",\"issueTime\":\"2021-06-11T16:15:00+08:00\",\"updateTime\":\"2021-06-11T16:15:00+08:00\"}}";
  329.     int StartPos = 0;
  330.     int EndPos = weatherJSON.length() - 1;
  331.     int ResultStart = 0;
  332.     int ResultEnd = EndPos;
  333.     String sTemp;
  334.    
  335.     // Check WRAIN
  336.     wRAIN = 0;
  337.     if (GetJsonRange("\"WRAIN\":{", "}", StartPos, EndPos, &ResultStart, &ResultEnd)){
  338.       StartPos = ResultStart;
  339.       EndPos = ResultEnd;
  340.       if (GetJsonRange("\"actionCode\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  341.         sTemp = weatherJSON.substring(ResultStart, ResultEnd);
  342.         if ((sTemp != "CANCEL") && (GetJsonRange("\"code\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd))){
  343.           sTemp = weatherJSON.substring(ResultStart, ResultEnd);
  344.           if (sTemp == "WRAINA") wRAIN = 1;
  345.           else if (sTemp == "WRAINR") wRAIN = 2;
  346.           else if (sTemp == "WRAINB") wRAIN = 3;
  347.         }
  348.       }
  349.     }
  350.     message = "\n\r\n\rwRAIN=";
  351.     message += wRAIN;
  352.    
  353.     // Check Thunderstorm warning WTS
  354.     StartPos = 0;
  355.     EndPos = weatherJSON.length() - 1;
  356.     WTS = false;
  357.     if (GetJsonRange("\"WTS\":{", "}", StartPos, EndPos, &ResultStart, &ResultEnd)){
  358.       StartPos = ResultStart;
  359.       EndPos = ResultEnd;
  360.       
  361.       if (GetJsonRange("\"actionCode\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  362.         sTemp = weatherJSON.substring(ResultStart, ResultEnd);
  363.         if (sTemp != "CANCEL") WTS = true;
  364.       }
  365.     }
  366.     message += "\n\rWTS=";
  367.     if (WTS) message += "true";
  368.     else message += "false";
  369.    
  370.     // Check Tropical Cyclone Warning Signal WTCSGNL
  371.     StartPos = 0;
  372.     EndPos = weatherJSON.length() - 1;
  373.     WTCSGNL = "None";
  374.     if (GetJsonRange("\"WTCSGNL\":{\"", "}", StartPos, EndPos, &ResultStart, &ResultEnd)){
  375.       StartPos = ResultStart;
  376.       EndPos = ResultEnd;
  377.       if (GetJsonRange("\"actionCode\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  378.         if (weatherJSON.substring(ResultStart, ResultEnd) != "CANCEL") {
  379.           if (GetJsonRange("\"code\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  380.             WTCSGNL = weatherJSON.substring(ResultStart, ResultEnd);
  381.           }
  382.         }
  383.       }
  384.     }
  385.     message += "\n\rWTCSGNL=" + WTCSGNL;
  386.    
  387.     // Check WHOT
  388.     wCH = 0;
  389.     StartPos = 0;
  390.     EndPos = weatherJSON.length() - 1;
  391.     if (GetJsonRange("\"WHOT\":{\"", "}", StartPos, EndPos, &ResultStart, &ResultEnd)){
  392.       StartPos = ResultStart;
  393.       EndPos = ResultEnd;
  394.       if (GetJsonRange("\"actionCode\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  395.         if (weatherJSON.substring(ResultStart, ResultEnd) != "CANCEL") wCH = 2;
  396.       }
  397.     }
  398.    
  399.     // Check WCOLD
  400.     StartPos = 0;
  401.     EndPos = weatherJSON.length() - 1;
  402.     // wCH already reset before WHOT check, no need to reset in here
  403.     if (GetJsonRange("\"COLD\":{\"", "}", StartPos, EndPos, &ResultStart, &ResultEnd)){
  404.       StartPos = ResultStart;
  405.       EndPos = ResultEnd;
  406.       if (GetJsonRange("\"actionCode\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  407.         if (weatherJSON.substring(ResultStart, ResultEnd) != "CANCEL") wCH = 1;
  408.       }
  409.     }
  410.     message += "\n\rwCH=";
  411.     message += wCH;
  412.    
  413.     // Get WFIRE
  414.     StartPos = 0;
  415.     EndPos = weatherJSON.length() - 1;
  416.     wFire = 0;
  417.     if (GetJsonRange("\"WFIRE\":{\"", "}", StartPos, EndPos, &ResultStart, &ResultEnd)){
  418.       StartPos = ResultStart;
  419.       EndPos = ResultEnd;
  420.       if (GetJsonRange("\"actionCode\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  421.         if (weatherJSON.substring(ResultStart, ResultEnd) != "CANCEL") {
  422.           if (GetJsonRange("\"code\":\"", "\"", StartPos, EndPos, &ResultStart, &ResultEnd)){
  423.             sTemp = weatherJSON.substring(ResultStart, ResultEnd);
  424.             if (sTemp == "WFIREY") wFire = 1;      // yellow
  425.             else if (sTemp == "WFIRER") wFire = 2; // red
  426.           }
  427.         }
  428.       }
  429.     }
  430.     message += "\n\rwFire=";
  431.     message += wFire;
  432.   }
  433.   
  434.   message = weatherJSON + message;
  435.   server.send(200, "text/plain", message);
  436. }

  438. void handleNotFound() {
  439.   String message = "File Not Found\n\n";
  440.   message += "URI: ";
  441.   message += server.uri();
  442.   message += "\nMethod: ";
  443.   message += (server.method() == HTTP_GET)?"GET":"POST";
  444.   message += "\nArguments: ";
  445.   message += server.args();
  446.   message += "\n";
  447.   for (uint8_t i = 0; i < server.args(); i++)
  448.     message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
  449.   server.send(404, "text/plain", message);
  450. }

  452. bool GetJson(String dataType){
  453.   /*
  454.     dataType can be: rhrread, warnsum, fnd...etc
  455.   */
  456.   bool Result = false;
  457.   HTTPClient http;
  458.   WiFiClientSecure client;
  459.   client.setInsecure(); // use with caution
  460.   weatherJSON = "";     // clear previous JSON
  461.   
  462.   http.begin(client, "https://data.weather.gov.hk/weatherAPI/opendata/weather.php?dataType=" + dataType + "&lang=en");
  463.   if (http.GET() == HTTP_CODE_OK) {
  464.     weatherJSON = http.getString();
  465.     Result = true;
  466.   }
  467.   return Result;
  468. }

  470. bool GetJsonRange(String StartString, String EndString, int StartPos, int EndPos, int *SectionStart, int *SectionEnd) {
  471.   bool Good = true;
  472.   int ResultStart = StartPos;
  473.   int ResultEnd = EndPos;
  474.   String message = "";
  475.   // initial check
  476.   if ((StartString == "") || (EndString =="")) Good = false;
  477.   if (!Good || (StartPos < 0) || (StartPos > weatherJSON.length() - 1)) Good = false;
  478.   if (!Good || (EndPos <= StartPos) || (EndPos > weatherJSON.length() -1)) Good = false;
  479.   
  480.   if (Good) {
  481.     ResultStart = weatherJSON.indexOf(StartString, StartPos);
  482.     if (ResultStart < 0) Good =false;
  483.     else {
  484.       ResultStart += StartString.length();
  485.       if (ResultStart > EndPos) Good =false;
  486.       else {
  487.         ResultEnd = weatherJSON.indexOf(EndString, ResultStart);
  488.         if (ResultEnd > EndPos) Good = false;
  489.       }
  490.     }
  491.   }
  492.   if (Good) {
  493.     *SectionStart = ResultStart;
  494.     *SectionEnd = ResultEnd;
  495.   }
  496.   return Good;
  497. }
複製代碼
.

好似寫了好多行，實際有百幾行係重複 ，handleRhrread 和 handleWarnsum 以及 handleRhrread2 和 handleWarnsum2 基本上係一樣，分別只係前者會即時上天文台下載資料，而後者是我用來做測試，用了昨晚又一號風球、又黃雨、又雷暴……etc 的時候下載資料。

上載及連到 WiFi 後(LED 會熄)，可以用以用 Web browser 經以下網址讀取資料：
http://ip-address:PortNo/xxxx

ip-address 係 Router 派給 ESP8266 的 ip
PortNo 係程式開頭由你自定的 Port number
xxxx 可以係 rhrread 或 warnsum。(以及 rhrread2 或 warnsum2)

主要係經 GetJson() 去下載天文台的 JSON 檔。

至於由 JSON 搵出想要的資料，應該係有 Library 去解讀內容，但我懶得睇 Library 的說明，寧願自己寫，我用 GetJsonRange() 去搵我想要的數值。

例如搵九龍城氣溫，氣溫必定係以下一段之內：
"temperature":{"data":[{...},{...},...{九龍城資料},...{...}]}
我先用 GetJsonRange() 去搵 "temperature":{"data":[ 以及 ] 的位置(ResultStart, ResultEnd)。

然後係上次搵到的範圍內再搵九龍城資料，這資料會類似係：
{"place":"Kowloon City","value":28,"unit":"C"}
而溫度就夾係 "place":"Kowloon City","value": 同後面的逗號之間，可以再用 GetJsonRange() 去搵這兩個位置，最後就可以用substring 從 weatherJSON 之中抽出溫度數值(String)。

不過有些資料，例如暴雨警告，除了搵 WRAIN 同個 code 之外，還是睇埋 actionCode 是否 CANCEL。

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marlin12

Rank: 2Rank: 2
13#
發表於 2021-6-13 12:22 | 只看該作者
本帖最後由 marlin12 於 2021-6-13 15:38 編輯

有時間的話，可以試用ArduinoJson v6。
這個程式庫是雙向的，可以把陣列(array)轉為JSON，或者JSON轉為陣列。

ArduinoJson

Deserialize with ArduinoJson (JSON轉array)

還有ArduinoJson Assistant，教埋你點用。
只需要揀啱Processor(ESP8266)、Mode(Deserialize)、Input Type(String)，然後放你個JSON字串入去，相關的程式便會自動產生出來。

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C_Law

Rank: 3Rank: 3Rank: 3
14#
發表於 2021-6-13 16:16 | 只看該作者
有時間的話，可以試用ArduinoJson v6。
這個程式庫是雙向的，可以把陣列(array)轉為JSON，或者JSON轉為陣列 ...
marlin12 發表於 2021/6/13 12:22


Thx~~~

其實我都有裝 ArduinoJson，不過無心機睇 Tutorial，我見天文台幾個 JSON 的結構不是太複雜，就嘗試寫 GetJsonRange() 玩下先。

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royc

Rank: 2Rank: 2
15#
發表於 2021-6-13 21:23 | 只看該作者
多謝各位師兄資料，都要時間消代一下。
Thanks

via HKEPC IR Pro 3.6.1 - iOS(3.0.0)

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xiao

Rank: 3Rank: 3Rank: 3
16#
發表於 2021-6-16 09:16 | 只看該作者
厲害, 結果看似簡單, 原來寫碼要這麼長

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C_Law

Rank: 3Rank: 3Rank: 3
17#
發表於 2021-6-18 21:33 | 只看該作者
厲害, 結果看似簡單, 原來寫碼要這麼長
xiao 發表於 2021/6/16 09:16


其實我無學過 C++，亂寫一通 ，識寫應該可以寫得簡潔好多！

大致上完成我心目中想做的事。係差在不知怎去整黑雨警告，事關不想睇電視時被個鐘的光度吸引了視線，所以個鐘用黑色做底色，但黑底加個黑色雨字就即係無字！不想雨字改其他顏色，唯有係個雨字加底色，但試了好組合，還未試到個效果好的底色可以配到黃/紅黑。暫時用個「雨」字頂檔，遲下得閒會畫公仔。
LCD_Clock20210618a.jpg

ps.個 LCD 內置字庫同畫圖指令，話就話有 64 色可揀，但好多色重複，實際可用顏色其實好小。

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