|
1、硬件 用一個(gè)四博智聯(lián)提供的nodemcu。一個(gè)OLED屏，一個(gè)USB線，4根杜邦線，可以上網(wǎng)的路由器，電腦。
3V3---VCC GND---GND GPIO4(D2)---SDA GPIO5(D1)---SCL
2、設(shè)置路由器 把路由器賬號(hào)設(shè)置為把路由器賬號(hào)設(shè)置為 賬號(hào)：xh003 密碼：zxd+19901120= 3、燒錄程序 打開(kāi)ESP_TOOLS下載工具，選擇8266.
點(diǎn)擊START.等待燒錄完成。
燒錄完成后復(fù)位一下nodemcu。等待10s左右。 測(cè)試結(jié)果如下：
Arduino代碼如下： #include #include #include #include "OLED.h" static const char logo[] PROGMEM={ 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0xff,0x7f,0x80,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0xff,0x03,0x00,0xf0,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0x7f,0x00,0x00,0x80,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0x0f,0x00,0x00,0x00,0xfe,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0x03,0x00,0x00,0x00,0xf8,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0xe0,0xff,0x03,0x00,0xe0,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x1f,0x1c,0xf0,0x1f,0x00,0x80,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x0f,0x00,0x80,0x7f,0x00,0x00,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x0f,0x00,0x00,0xff,0x01,0x00,0xfc,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x07,0x00,0x00,0xfe,0x03,0x00,0xf8,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x03,0x00,0x00,0xfc,0x07,0x00,0xf8,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x01,0x00,0x00,0xf8,0x0f,0x00,0xf0,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x00,0x00,0x00,0xf0,0x1f,0x00,0xf0,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x3f,0x00,0x00,0x00,0xf0,0x1f,0x00,0xf0,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x1f,0x00,0x00,0x00,0xf0,0x1f,0x00,0xf0,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x1f,0x00,0x00,0x00,0xf0,0x1f,0x00,0xf0,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x0f,0x00,0x00,0x00,0xf0,0x3f,0x00,0xf0,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x07,0x00,0x00,0x00,0xf0,0x1f,0x00,0xf8,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x07,0x00,0x00,0x00,0xf0,0x0f,0x00,0xf8,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x03,0x00,0x00,0x00,0xf8,0x03,0x00,0xfc,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x01,0x00,0x00,0x00,0xfc,0x00,0x00,0x7e,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x01,0x00,0x00,0x00,0x7f,0x00,0x00,0x7f,0xf8,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x00,0x00,0x00,0x80,0x1f,0x00,0x80,0x7f,0xf8,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x00,0x00,0x00,0xe0,0x07,0x00,0xc0,0x3f,0xf0,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x00,0x00,0x00,0xf8,0x01,0x00,0xe0,0x3f,0xf0,0xff,0xff,0xff,0x7f, 0xff,0xff,0x7f,0x00,0x00,0x00,0x7f,0x00,0x00,0xf8,0x3f,0xf0,0xff,0xff,0xff,0x7f, 0xff,0xff,0x7f,0x00,0x00,0xe0,0x1f,0x00,0x00,0xfe,0x0f,0xf0,0xff,0xff,0xff,0x7f, 0xff,0xff,0x7f,0x00,0x00,0xf8,0x03,0x00,0x80,0xff,0x0f,0xf8,0xff,0xff,0xff,0x7f, 0xff,0xff,0x7f,0x00,0x00,0x7e,0x00,0x00,0xe0,0xff,0x01,0xf0,0xff,0xff,0xff,0x7f, 0xff,0xff,0x7f,0x00,0x00,0x1f,0x00,0x00,0xf8,0xff,0x00,0xf8,0xff,0xff,0xff,0x7f, 0xff,0xff,0x7f,0x00,0xc0,0x0f,0x00,0x00,0xfe,0x7f,0x00,0xfc,0xff,0xff,0xff,0x7f, 0xff,0xff,0x7f,0x00,0xe0,0x03,0x00,0x80,0xff,0x1f,0x00,0xfe,0xff,0xff,0xff,0x7f, 0xff,0xff,0x7f,0x00,0xf8,0x01,0x00,0xe0,0xff,0x07,0x00,0xfe,0xff,0xff,0xff,0x7f, 0xff,0xff,0x7f,0x00,0x7c,0x00,0x00,0xfc,0xff,0x00,0x00,0xfc,0xff,0xff,0xff,0x7f, 0xff,0xff,0x7f,0x00,0x3e,0x00,0x00,0xff,0x07,0x00,0x00,0xfc,0xff,0xff,0xff,0x7f, 0xff,0xff,0x7f,0x00,0x0f,0x00,0xc0,0xff,0x07,0x00,0x00,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x80,0x07,0x00,0xf0,0xff,0xff,0x0f,0xc0,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xc0,0x03,0x00,0xf8,0xff,0xff,0x3f,0xf8,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xc0,0x01,0x00,0xfe,0xf8,0xc7,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xe1,0x01,0x00,0x7f,0xc0,0x03,0x87,0x00,0xfe,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xe1,0x00,0xc0,0x7f,0x80,0x01,0x86,0x00,0xfe,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x63,0x00,0xe0,0x7f,0x80,0x01,0x86,0x00,0xfe,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x63,0x00,0xe0,0x7f,0x8c,0x31,0x86,0xc3,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x67,0x00,0xc0,0x7f,0x8c,0x31,0x86,0x83,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x6f,0x00,0xc0,0x7f,0x8c,0x31,0x86,0x83,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x7f,0x00,0xc0,0x7f,0x8c,0x31,0x86,0x83,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0x7f,0x00,0xc0,0x7f,0x8c,0x31,0x86,0x83,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x00,0x80,0x7f,0x80,0x01,0x86,0x83,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x01,0x00,0x7f,0x80,0x01,0x86,0x83,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x03,0x00,0x7c,0xc0,0x03,0x87,0x83,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x07,0x00,0xf8,0xff,0xff,0xf1,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x0f,0x00,0xe0,0xff,0x7f,0xf0,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x3f,0x00,0x00,0xfe,0x07,0xfc,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0x7f,0x00,0x00,0x00,0x00,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0x03,0x00,0x00,0xe0,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0x0f,0x00,0x00,0xfc,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0x7f,0x00,0x80,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0xff,0x3f,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f, 0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0x7f }; //GPIO4(SDA) GPIO5(SCL) OLED display(4, 5);
const char* ssid = "xh003"; // XXXXXX -- 使用時(shí)請(qǐng)修改為當(dāng)前你的 wifi ssid const char* password = "zxd+19901120="; // XXXXXX -- 使用時(shí)請(qǐng)修改為當(dāng)前你的 wifi 密碼 const char* host = "api.seniverse.com"; const char* APIKEY = "wcmquevztdy1jpca"; //API KEY const char* city = "shenzhen"; const char* language = "en";//zh-Hans 簡(jiǎn)體中文 會(huì)顯示亂碼
const unsigned long BAUD_RATE = 115200; // serial connection speed const unsigned long HTTP_TIMEOUT = 5000; // max respone time from server const size_t MAX_CONTENT_SIZE = 1000; // max size of the HTTP response
// 我們要從此網(wǎng)頁(yè)中提取的數(shù)據(jù)的類型 struct UserData { char city[16];//城市名稱 char weather[32];//天氣介紹（多云...） char temp[16];//溫度 char udate[32];//更新時(shí)間 };
WiFiClient client; char response[MAX_CONTENT_SIZE]; char endOfHeaders[] = "";
/** * @Desc 初始化操作 */ void setup() { WiFi.mode(WIFI_STA); //設(shè)置esp8266 工作模式 Serial.begin(BAUD_RATE); delay(10); Serial.println(); Serial.println(); Serial.print("Connecting to ");//寫(xiě)幾句提示，哈哈 Serial.println(ssid); WiFi.begin(ssid, password); //連接wifi while (WiFi.status() != WL_CONNECTED) { //這個(gè)函數(shù)是wifi連接狀態(tài)，返回wifi鏈接狀態(tài) delay(100); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); delay(100); Serial.println("IP address: "); Serial.println(WiFi.localIP());//WiFi.localIP()返回8266獲得的ip地址 client.setTimeout(HTTP_TIMEOUT);
}
/** * @Desc 主函數(shù) */
void loop() { //初始化oled display.begin();
//測(cè)試顯示信息 display.print("Hello DOIT",2,3); display.print("www.doit.am",4,3); delay(2*1000); display.clear();
while (!client.connected()){ if (!client.connect(host, 80)){ Serial.println("connection...."); delay(100); } } if (sendRequest(host, city, APIKEY) && skipResponseHeaders()) { clrEsp8266ResponseBuffer(); readReponseContent(response, sizeof(response)); UserData userData; if (parseUserData(response, &userData)) { printUserData(&userData); } } delay(300);//每5s調(diào)用一次 }
/** * @發(fā)送請(qǐng)求指令 */ bool sendRequest(const char* host, const char* cityid, const char* apiKey) { // We now create a URI for the request //心知天氣 String GetUrl = "/v3/weather/now.json?key="; GetUrl += apiKey; GetUrl += "&location="; GetUrl += city; GetUrl += "&language="; GetUrl += language; // This will send the request to the server client.print(String("GET ") + GetUrl + " HTTP/1.1" + "Host: " + host + "" + "Connection: close"); Serial.println("create a request:"); Serial.println(String("GET ") + GetUrl + " HTTP/1.1" + "Host: " + host + "" + "Connection: close"); delay(100); return true; }
/** * @Desc 跳過(guò) HTTP 頭，使我們?cè)陧憫?yīng)正文的開(kāi)頭 */ bool skipResponseHeaders() { // HTTP headers end with an empty line bool ok = client.find(endOfHeaders); if (!ok) { Serial.println("No response or invalid response!"); } return ok; }
/** * @Desc 從HTTP服務(wù)器響應(yīng)中讀取正文 */ void readReponseContent(char* content, size_t maxSize) { size_t length = client.peekBytes(content, maxSize); delay(100); Serial.println("Get the data from Internet!"); content[length] = 0; Serial.println(content); Serial.println("Read data Over!"); client.flush();//這句代碼需要加上 不然會(huì)發(fā)現(xiàn)每隔一次client.find會(huì)失敗 }
/** * @Desc 解析數(shù)據(jù) * 數(shù)據(jù)格式如下： * { * "results": [ * { * "location": { * "id": "WX4FBXXFKE4F", * "name": "北京", * "country": "CN", * "path": "北京,北京,中國(guó)", * "timezone": "Asia/Shanghai", * "timezone_offset": "+08:00" * }, * "now": { * "text": "多云", * "code": "4", * "temperature": "23" * }, * "last_update": "2017-09-13T09:51:00+08:00" * } *} */ bool parseUserData(char* content, struct UserData* userData) { // -- 根據(jù)我們需要解析的數(shù)據(jù)來(lái)計(jì)算JSON緩沖區(qū)最佳大小 // 如果你使用StaticJsonBuffer時(shí)才需要 // const size_t BUFFER_SIZE = 1024; // 在堆棧上分配一個(gè)臨時(shí)內(nèi)存池 // StaticJsonBuffer jsonBuffer; // -- 如果堆棧的內(nèi)存池太大，使用 DynamicJsonBuffer jsonBuffer 代替 DynamicJsonBuffer jsonBuffer;
JsonObject& root = jsonBuffer.parseObject(content);
if (!root.success()) { Serial.println("JSON parsing failed!"); return false; }
//復(fù)制我們感興趣的字符串 strcpy(userData->city, root["results"][0]["location"]["name"]); strcpy(userData->weather, root["results"][0]["now"]["text"]); strcpy(userData->temp, root["results"][0]["now"]["temperature"]); strcpy(userData->udate, root["results"][0]["last_update"]); // -- 這不是強(qiáng)制復(fù)制，你可以使用指針，因?yàn)樗麄兪侵赶颉皟?nèi)容”緩沖區(qū)內(nèi)，所以你需要確保 // 當(dāng)你讀取字符串時(shí)它仍在內(nèi)存中 return true; }
// 打印從JSON中提取的數(shù)據(jù) void printUserData( struct UserData* userData) { Serial.println("Print parsed data :"); display.print("City: ",0,0); display.print(userData->city,0,6); display.print("Weat: ",2,0); display.print(userData->weather,2,6); display.print("Temp: ",4,0); display.print(userData->temp,4,6); // display.print("Last Updata : ",7,2); display.print(userData->udate,6,0); // display.print(""); delay(4*1000); }
// 關(guān)閉與HTTP服務(wù)器連接 void stopConnect() { Serial.println("Disconnect"); client.stop(); }
void clrEsp8266ResponseBuffer(void){ memset(response, 0, MAX_CONTENT_SIZE); //清空 }
|
