WiFi模組通訊實作Part2 – Ideaschain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https://iiot.ideaschain.com.tw/的雲端。
Ideaschain國產免費的雲端平臺，由財團法人資訊工業策進會數位服務創新研究所由開發。
發送資料格式：
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POST /api/v1/DEVICE_KEY/telemetry HTTP/1.1 Content-Type: application/json Content-Length: param_lenth Host: iiot.ideaschain.com.tw param_data |
程式列表
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""" ePy_ESP01_ideaschain.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 = "ideaschain.com.tw" # 伺服器網址，不可動 PORT = 80 API_URL = "iiot.ideaschain.com.tw" # 連線對象URL，不可動 DEVICE_KEY = " xxxxxxxxxxxxxxxxxxxx" # 資料平台裝置的存取權限碼 key1 = "EPY_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\",\"" + HOST + "\"," + str(PORT) + "\r\n" sendData(CIPSTART_CMD,15000,DEBUG)
# 上傳訊息內容格式，其中key1為資料名稱(如溫度、濕度...等)，value1為資料內容(如28、66.5...等) param_data = "{\r\n "+ key1 + ": " + str(light_val) +"\r\n}" param_lenth = str(len(param_data)) # 計算訊息的字串總長度
# 定義發送至伺服器的訊息內容 request_str = "POST /api/v1/" + DEVICE_KEY + "/telemetry HTTP/1.1\r\n" \ + "Content-Type: application/json\r\n" \ + "Content-Length: " + param_lenth + "\r\n" \ + "Host: " + API_URL + "\r\n\r\n" \ + param_data + "\r\n\r\n" \ + "Connection: close\r\n\r\n" request_lenth = str(len(request_str)) # 計算訊息的字串總長度 if(DEBUG): print(request_str) # 顯示此訊息內容進行debug
CIPSEND_CMD="AT+CIPSEND=" + request_lenth + "\r\n" if(DEBUG): print(request_str); # 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(request_str, 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
