add hostname function

change hostname to led-tree

conf/example_config.json

@@ -1,7 +1,8 @@
 {
   "wifi": {
     "ssid": "VGhpcyBpcyBub3QgYSByZWFsIFNTSUQ=",
-    "password": "VGhpcyBpcyBhIG5vdCBhIHJlYWwgUDQkJHcwcmQh"
+    "password": "VGhpcyBpcyBhIG5vdCBhIHJlYWwgUDQkJHcwcmQh",
+    "hostname": "pico-led-tree"
   },
   "time_api": {
     "host": "worldtimeapi.org",

main.py

@@ -29,6 +29,7 @@
 COLON = ':'
 OPENING_BRACE = '{'
 CLOSING_BRACE = '}'
+WIFI_MODE = 3
 WIFI_CHECK_PERIOD = 3_600_000  # milliseconds (hourly)
 # HOURS_PER_DAY = 24
 # HOURS_TO_SYNC_TIME = list(range(HOURS_PER_DAY))
@@ -145,7 +146,9 @@ def init_esp8266():
     '''
     set the current WiFi in SoftAP+STA
     '''
-    esp01.setCurrentWiFiMode()
+    esp01.setCurrentWiFiMode(WIFI_MODE)
+    esp01.deviceHostname(config["wifi"]["hostname"])
+    print(esp01.deviceHostname())
     # apList = esp01.getAvailableAPs()
     # for items in apList:
     #    print(items)

wifi/esp8266.py

@@ -454,6 +454,31 @@ def disconnectWiFi(self):
         else:
             return False
 
+    def deviceHostname(self,hostname=None):
+        """
+        This function is used to set a hostname for ESP8266
+        
+        Return:
+            False on failed to set hostname
+            True on successfully set hostname
+        """
+        if hostname:
+            retData = self._sendToESP8266("AT+CWHOSTNAME=\"{}\"\r\n".format(hostname))
+            if(retData != None):
+                print(str(retData))
+                if ESP8266_OK_STATUS in retData:
+                    return True
+                else:
+                    return False
+            else:
+                return False
+        else:
+            retData = self._sendToESP8266("AT+CWHOSTNAME?\r\n")
+            if(retData != None):
+                return str(retData)
+            else:
+                return False
+
     def _createTCPConnection(self, link, port=80):
         """
         This function is used to create connect between ESP8266 and Host.