WiFi模組通訊實作Part1 – dweet.io 雲端平臺

 

WiFi模組通訊實作Part1 – dweet.io 雲端平臺

 

範例說明

利用epy上的ADC量測Light感測器，epy透過UART介面與ESP01 WiFi模組連接。將資料傳送到http://dweet.io/的雲端。

dweet.io免費的雲端平臺，不需要註冊帳戶獲取 ID或KEY。

發送資料格式：https://dweet.io/dweet/for/my-thing-name?hello=world

my-thing-name 是自己起的地址名稱；hello=world 鍵值對數據

用網頁打開獲取資料：https://dweet.io/get/dweets/for/my-thing-name

https://dweet.io/get/latest/dweet/for/my-thing-name

http://dweet.io/follow/my-thing-name

 程式列表

"""  ePy_ESP01.py    EPY           ESP01  -----------------  3V3           VCC  P8(UART1_TxD) RxD  P9(UART1_RxD) TxD  GND           GND   """   from machine import KEY  #獲取按鍵KEY庫 from machine import ADC from machine import PIN from machine import UART from machine import LED import utime   SSID = "MYAP"            # 填入要連線的WiFi熱點名稱 PASSWORD = "19760106"    # Wi-Fi熱點密碼 HOST = "dweet.io"        # 伺服器網址，不可動 PORT = 80 thing_name = "EPY_dweet" hello = "Light" str1 = "" DEBUG = True ledR = None   """ * Name: sendData * Description: this Function regulates how the AT Commands will ge sent to the ESP8266. * * Params: command - the AT Command to send *                 - timeout - the time to wait for a response *                 - debug - print to Serial window?(true = yes, false = no) * * Returns: The response from the esp8266 (if there is a reponse) """ def sendData(command,timeout,debug):   response = ""   uar_1.write(command)   utime.sleep_ms(timeout)   response = uar_1.read() # 從串口讀取資料   if(debug):     #if the "debug" variable value is TRUE, print the response on the Serial monitor.     cmd = response.decode('utf-8');     print("received:",cmd) # 列印接收到的資料   return response  #return the String response.   """ * Name: InitWifiModule * Description: this Function gives the commands that we need to send to the sendData() function to send it. * * Params: Nothing. * * Returns: Nothing (void). """ def InitWifiModule():   print("connecting to wifi")   sendData("AT\r\n",200,DEBUG)     str1 = sendData("AT+RST\r\n",1000,False)   if(DEBUG):     print("received:",str1) # 列印接收到的資料     # print("received:{}".format(str1)) # 列印接收到的資料     sendData("AT+GMR\r\n",1000,DEBUG)     CWJAP_CMD="AT+CWJAP=\"" + SSID + "\",\"" + PASSWORD + "\"\r\n"   sendData(CWJAP_CMD,25000,DEBUG)   utime.sleep_ms(3000)     sendData("AT+CWMODE=1\r\n", 1500, DEBUG)  #set the ESP8266 WiFi mode to station mode.   utime.sleep_ms(1000)     sendData("AT+CIFSR\r\n", 1500, DEBUG)  #Show IP Address, and the MAC Address.   utime.sleep_ms(1000)     # Start Function if __name__ == '__main__':   ledR = LED(LED.LED1)   light = ADC(4)   uar_1=UART(1,115200)   key_c = KEY(KEY.KEYC)    #創建按鍵C     InitWifiModule()   print("--- Start ---")     light_val=0     try:     while True:       light_val = light.read()         ledR.on()       CIPSTART_CMD="AT+CIPSTART=\"TCP\",\"dweet.io\",80\r\n"       sendData(CIPSTART_CMD,15000,DEBUG)         #https://dweet.io/dweet/for/my-thing-name?hello=world       param_data = "POST /dweet/for/" + thing_name + "?" \                  + hello + "=" + str(light_val) \                  + "\r\nHost: www.dweet.io\r\nConnection: close\r\n\r\n"       param_lenth = str(len(param_data))    # 計算訊息的字串總長度         CIPSEND_CMD="AT+CIPSEND=" + param_lenth + "\r\n"       if(DEBUG):         print(param_data);   # 顯示此訊息內容進行debug         print(CIPSEND_CMD);  # 顯示此訊息內容進行debug         data = sendData(CIPSEND_CMD, 1000, DEBUG)       if 'ERROR' in data:   # 使用in運算子檢查         print('find \"ERROR\"')       if '>' in data:   # 使用in運算子檢查         print('find \">\"')       else:         print('not find \">\"')       # while (data.find(">")<0):         # utime.sleep_ms(100)         # if(uar_1.any()): # 當串口有可讀數據時           # data = uar_1.read()       sendData(param_data, 1000, DEBUG)       ledR.off()       utime.sleep_ms(5000)         if key_c.value() == 0:      #如果按鍵C被按下         break     finally:     pass   light.deinit() uar_1.deinit() key_c.deinit()

 

執行結果