diff --git a/README.md b/README.md
index a3eb63e..e01ff20 100644
--- a/README.md
+++ b/README.md
@@ -6,10 +6,11 @@ All documentation is on:
 
 https://shop.switchdoc.com/products/skyweather-raspberry-pi-based-weather-station-kit-for-the-cloud
 
-Version V039 
+Version V040  - EXPERIMENTAL!
 
 http://www.switchdoc.com/
 
+July 8, 2019:    Version 040 - WeatherUnderground Fix, Support for SHT30 - EXPERIMENTAL!<BR>
 June 5, 2019:    Version 039 - AM2315 Reliablity Fix <BR>
 May 21, 2019:    Version 038 - Blynk Bug Fix<BR>
 May 21, 2019:    Version 037 - Blynk Changes / Bug Fix<BR>
diff --git a/SDL_Pi_SHT30/.gitignore b/SDL_Pi_SHT30/.gitignore
new file mode 100644
index 0000000..3223751
--- /dev/null
+++ b/SDL_Pi_SHT30/.gitignore
@@ -0,0 +1,12 @@
+*.pyc
+tx*
+.*.swp
+*.xml
+*.temp
+*.test
+nohup.out
+.*DS_Store
+conflocal.py
+state/EnglishMetric.txt
+static/SkyCamera.py
+static/*.png
diff --git a/SDL_Pi_SHT30/LICENSE b/SDL_Pi_SHT30/LICENSE
new file mode 100644
index 0000000..c151d06
--- /dev/null
+++ b/SDL_Pi_SHT30/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Robert Wolterman
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/SDL_Pi_SHT30/README.md b/SDL_Pi_SHT30/README.md
new file mode 100644
index 0000000..769bb3a
--- /dev/null
+++ b/SDL_Pi_SHT30/README.md
@@ -0,0 +1,27 @@
+#
+# SDL_Pi_SHT30
+#
+# SHT30 Pure Python Library
+# SwitchDoc Labs July 2019
+#
+#
+
+Version 1.1: July 8, 2019:  Initial Version
+ 
+
+#Introduction
+
+For the SwitchDoc Labs SHT30<BR>
+
+
+
+# testing
+
+```
+import SHT30 
+sens = SHT30.SHT30()
+print sens.read_temperature()
+print sens.read_humidity()
+print sens.read_humidity_temperature()
+print sens.read_humidity_temperature_crc()
+```
diff --git a/SDL_Pi_SHT30/SHT30.py b/SDL_Pi_SHT30/SHT30.py
new file mode 100644
index 0000000..91014c5
--- /dev/null
+++ b/SDL_Pi_SHT30/SHT30.py
@@ -0,0 +1,233 @@
+#!usr/bin/python 
+# SwitchDoc Labs, 2019
+# added more reliablity functions including GrovePower Save
+
+
+# MODULE IMPORTS
+import time
+
+import smbus
+
+import traceback
+import RPi.GPIO as GPIO
+
+GPIO.setmode(GPIO.BCM)
+
+# GLOBAL VARIABLES
+SHT30_I2CADDR = 0x44
+SHT30_READCOMMAND = 0x2C
+SHT30_READREG = 0x00
+MAXREADATTEMPT = 10
+SHT30_POLYNOMIAL = 0x131  # P(x) = x^8 + x^5 + x^4 + 1 = 100110001
+
+SHT30DEBUG = False
+
+class SHT30:
+    """Base functionality for SHT30 humidity and temperature sensor. """
+
+    def __init__(self, address=SHT30_I2CADDR, i2c=None, powerpin=0, **kwargs):
+
+        i2c = smbus.SMBus(1)
+        self.powerpin = powerpin
+        # for Grove PowerSave
+        if (self.powerpin <> 0):
+            GPIO.setup(self.powerpin, GPIO.OUT)
+            GPIO.output(self.powerpin, True)
+            time.sleep(1.0)
+
+        self._device = i2c 
+        self.humidity = 0
+        self.temperature = 0
+        self.crcT = 0
+        self.crcH = 0
+        self.SHT30PreviousTemp = -1000
+        self.goodreads = 0
+        self.badreadings = 0
+        self.badcrcs = 0
+        self.retrys = 0
+        self.powercycles = 0
+
+    def powerCycleSHT30(self):
+        if (SHT30DEBUG == True):
+            print ("power cycling SHT30")
+        GPIO.output(self.powerpin, False)
+        time.sleep(10.50)
+        GPIO.output(self.powerpin, True)
+        time.sleep(1.50)
+        self.powercycles += 1
+    
+    def verify_crc(self, data):
+        crc = 0xff
+        for byte in data:
+            crc ^= byte
+            for _ in range(8):
+                 if crc & 0x80:
+                    crc <<= 1
+                    crc ^= SHT30_POLYNOMIAL
+                 else:
+                    crc <<= 1
+        return crc
+
+
+
+    # fast read for device detection without faults
+    def _fast_read_data(self):   
+
+        
+        # TELL THE DEVICE WE WANT 4 BYTES OF DATA
+        self._device.write_i2c_block_data(SHT30_I2CADDR,SHT30_READCOMMAND,[0x06])
+        time.sleep(0.5)
+        tmp = self._device.read_i2c_block_data(SHT30_I2CADDR,SHT30_READREG,6)
+        print "tmp=", tmp
+        TRaw = (((tmp[0] & 0x7F) << 8) | tmp[1]) 
+        HRaw = ((tmp[3] << 8) | tmp[4]) 
+        self.temperature = ((TRaw * 175) / 65535.0) - 45
+        self.humidity = 100 * (HRaw) / 65535.0
+
+        self.crcT = tmp[2]
+        self.crcH = tmp[5]
+        # Verify CRC here
+        # force CRC error with the next line
+        #tmp[0] = tmp[0]+1
+        tT = bytearray([tmp[0], tmp[1]])
+        crcTC = self.verify_crc(tT)
+        tH = bytearray([tmp[3], tmp[4]])
+        crcHC = self.verify_crc(tH)
+
+        if (SHT30DEBUG == True):
+            print "SHT30temperature=",self.temperature
+            print "SHT30humdity=",self.humidity
+            print "SHT30crcTR=",self.crcT
+            print "SHT30crcTC=",crcTC
+            print "SHT30crcHR=",self.crcH
+            print "SHT30crcHC=",crcHC
+
+        if (self.crcT != crcTC) or (self.crcH != crcHC):
+            if (SHT30DEBUG == True):
+                print "AM2314 BAD CRC"
+            self.crc = -1
+
+
+    def _read_data(self):
+        count = 0
+        tmp = None
+        powercyclecount = 0
+        while count <= MAXREADATTEMPT:
+            try:
+                self._device.write_i2c_block_data(SHT30_I2CADDR,SHT30_READCOMMAND,[0x06])
+                time.sleep(0.5)
+                tmp = self._device.read_i2c_block_data(SHT30_I2CADDR,SHT30_READREG,6)
+
+                TRaw = (((tmp[0] & 0x7F) << 8) | tmp[1]) 
+                HRaw = ((tmp[3] << 8) | tmp[4]) 
+                self.temperature = ((TRaw * 175) / 65535.0) - 45
+                self.humidity = 100 * (HRaw) / 65535.0
+
+                self.crcT = tmp[2]
+                self.crcH = tmp[5]
+                # check for > 10.0 degrees higher
+                if (self.SHT30PreviousTemp != -1000):   # ignore first time
+                        if (self.humidity <0.01 or self.humidity > 100.0):
+                            # OK, humidity is bad.  Ignore
+                            if (SHT30DEBUG == True):
+                                print ">>>>>>>>>>>>>"
+                                print "Bad SHT30 Humidity = ", self.temperature
+                                print ">>>>>>>>>>>>>"
+                                self.badreadings = self.badreadings+1
+                                tmp = None
+                        else:
+                            if (abs(self.temperature - self.SHT30PreviousTemp) > 10.0):
+                                # OK, temp is bad.  Ignore
+                                if (SHT30DEBUG == True):
+                                    print ">>>>>>>>>>>>>"
+                                    print "Bad SHT30 Humidity = ", self.temperature
+                                    print ">>>>>>>>>>>>>"
+                                    self.badreadings = self.badreadings+1
+                                    tmp = None
+                            else:
+                                # Good Temperature
+                                self.SHT30PreviousTemp = self.temperature
+                else:
+                    # assume first is good temperature
+                    self.SHT30PreviousTemp = self.temperature
+                # IF WE HAVE DATA, LETS EXIT THIS LOOP
+                if tmp != None:
+                    break
+            except Exception as ex:
+                if (SHT30DEBUG == True):
+                    template = "An exception of type {0} occurred. Arguments:\n{1!r}"
+                    message = template.format(type(ex).__name__, ex.args)
+                    print message
+                    print traceback.format_exc()
+                    print "SHT30readCount = ", count
+            count += 1
+            self.retrys += 1
+            time.sleep(0.10)
+            # only do three power cycle attempts
+            if (self.powerpin <> 0):
+                if (count > MAXREADATTEMPT):
+                    self.powerCycleSHT30()
+                    if (powercyclecount <=2): 
+                        powercyclecount +1
+                        count = 0 
+            
+        # GET THE DATA OUT OF THE LIST WE READ
+        TRaw = (((tmp[0] & 0x7F) << 8) | tmp[1]) 
+        HRaw = ((tmp[3] << 8) | tmp[4]) 
+        self.temperature = ((TRaw * 175) / 65535.0) - 45
+        self.humidity = 100 * (HRaw) / 65535.0
+
+        self.crcT = tmp[2]
+        self.crcH = tmp[5]
+        # Verify CRC here
+        # force CRC error with the next line
+        # tmp[0] = tmp[0]+1
+        tT = bytearray([tmp[0], tmp[1]])
+        crcTC = self.verify_crc(tT)
+        tH = bytearray([tmp[3], tmp[4]])
+        crcHC = self.verify_crc(tH)
+
+        if (SHT30DEBUG == True):
+            print "SHT30temperature=",self.temperature
+            print "SHT30humdity=",self.humidity
+            print "SHT30crcTR=",self.crcT
+            print "SHT30crcTC=",crcTC
+            print "SHT30crcHR=",self.crcH
+            print "SHT30crcHC=",crcHC
+
+        if (self.crcT != crcTC) or (self.crcH != crcHC):
+            if (SHT30DEBUG == True):
+                print "SHT30 BAD CRC"
+            self.badcrcs = self.badcrcs + 1
+            self.crc = -1
+        else:
+            self.goodreads = self.goodreads+1
+
+    def fast_read_temperature(self):
+        self._fast_read_data()
+        return self.temperature
+
+    def read_temperature(self):
+        self._read_data()
+        return self.temperature
+
+    def read_humidity(self):
+        self._read_data()
+        return self.humidity
+
+    def read_humidity_temperature(self):
+        self._read_data()
+        return (self.humidity, self.temperature)
+
+    def read_humidity_temperature_crc(self):
+        self._read_data()
+        return (self.humidity, self.temperature, self.crcH, self.crcT)
+
+    def fast_read_humidity_temperature_crc(self):
+        self._fast_read_data()
+        return (self.humidity, self.temperature, self.crc, self.crcT)
+
+    def read_status_info(self):
+        return  (self.goodreads, self.badreadings, self.badcrcs, self.retrys,self.powercycles)
+
+    
diff --git a/SDL_Pi_SHT30/testSHT30.py b/SDL_Pi_SHT30/testSHT30.py
new file mode 100644
index 0000000..0bc4e8f
--- /dev/null
+++ b/SDL_Pi_SHT30/testSHT30.py
@@ -0,0 +1,14 @@
+#!/usr/bin/env python
+
+import SHT30
+thsen = SHT30.SHT30(powerpin=6)
+
+while (1):
+	print "T   ", thsen.read_temperature()
+	print "H   ", thsen.read_humidity()
+	print "H,T ", thsen.read_humidity_temperature()
+	print "H,T,C ", thsen.read_humidity_temperature_crc()
+        h,t,cH,cT = thsen.read_humidity_temperature_crc()
+        print "CRCH=0x%02x" % cH
+        print "CRCT=0x%02x" % cT
+
diff --git a/SkyWeather.py b/SkyWeather.py
index a902d0e..c10e0e4 100644
--- a/SkyWeather.py
+++ b/SkyWeather.py
@@ -14,7 +14,7 @@
 except ImportError:
 	import config
 
-config.SWVERSION = "039"
+config.SWVERSION = "040"
 
 
 import sys
@@ -55,6 +55,7 @@
 sys.path.append('./graphs')
 sys.path.append('./SDL_Pi_HDC1000')
 sys.path.append('./SDL_Pi_AM2315')
+sys.path.append('./SDL_Pi_SHT30')
 sys.path.append('./BME680')
 
 sys.path.append('./SDL_Pi_GrovePowerDrive')
@@ -689,6 +690,42 @@ def handle_as3935_interrupt(channel):
 GPIO.add_event_detect(as3935pin, GPIO.RISING, callback=handle_as3935_interrupt)
 
 
+##############
+# Setup SHT30
+# turn I2CBus 0 on
+if (config.TCA9545_I2CMux_Present):
+         tca9545.write_control_register(TCA9545_CONFIG_BUS0)
+
+# Grove Power Save Pins for device reset
+
+###############
+
+# Detect SHT30
+outsideHumidity = 0.0
+outsideTemperature = 0.0
+crc_check = -1
+import SHT30
+try:
+ 	sht30 = SHT30.SHT30(powerpin=config.SHT30GSPIN )
+	outsideHumidity, outsideTemperature, crc_checkH, crc_checkT = sht30.read_humidity_temperature_crc() 
+	
+	print "outsideTemperature: %0.1f C" % outsideTemperature
+    	print "outsideHumidity: %0.1f %%" % outsideHumidity
+        state.currentOutsideTemperature = outsideTemperature
+        state.currentOutsideHumidity = outsideHumidity
+        print "crcH: 0x%02x" % crc_checkH
+        print "crcT 0x%02x" % crc_checkT
+        config.SHT30_Present = True
+        if (crc_checkH == -1) or (crc_checkT == -1):
+        	config.SHT30_Present = False
+
+except:
+        config.SHT30_Present = False
+
+
+
+print "after SHT30"
+
 ##############
 # Setup AM2315
 # turn I2CBus 0 on
@@ -697,7 +734,6 @@ def handle_as3935_interrupt(channel):
 
 # Grove Power Save Pins for device reset
 
-config.AM2315GSPIN = 6
 
 ###############
 
@@ -708,8 +744,8 @@ def handle_as3935_interrupt(channel):
 import AM2315
 try:
  	am2315 = AM2315.AM2315(powerpin=config.AM2315GSPIN )
-	outsideHumidity, outsideTemperature, crc_check = am2315.read_humidity_temperature_crc() 
-	#outsideHumidity, outsideTemperature, crc_check = am2315.fast_read_humidity_temperature_crc() 
+	#outsideHumidity, outsideTemperature, crc_check = am2315.read_humidity_temperature_crc() 
+	outsideHumidity, outsideTemperature, crc_check = am2315.fast_read_humidity_temperature_crc() 
 	print "outsideTemperature: %0.1f C" % outsideTemperature
     	print "outsideHumidity: %0.1f %%" % outsideHumidity
         state.currentOutsideTemperature = outsideTemperature
@@ -1008,8 +1044,9 @@ def sampleWeather():
 		as3935InterruptStatus = "No AS3935 Lightning Detector Present"
 		as3935LastInterrupt = 0x00
 		
-	if (config.WXLink_Present == False): # do not use internal AM2315 if we are WXLink connected
-	   if (config.AM2315_Present):
+	if (config.WXLink_Present == False): # do not use internal AM2315 or SHT30 if we are WXLink connected
+           # if both AM2315 and SHT30 are present, SHT30 wins
+	   if (config.AM2315_Present) and ( config.SHT30_Present == False):
 		# get AM2315 Outside Humidity and Outside Temperature
 		# turn I2CBus 0 on
  		if (config.TCA9545_I2CMux_Present):
@@ -1031,6 +1068,24 @@ def sampleWeather():
 	        if (config.SWDEBUG == True):
                     print "AM2315 Stats: (g,br,bc,rt,pc)", am2315.read_status_info()
 
+           # if both AM2315 and SHT30 are present, SHT30 wins
+	   if (config.SHT30_Present):
+		# get SHT30 Outside Humidity and Outside Temperature
+		# turn I2CBus 0 on
+ 		if (config.TCA9545_I2CMux_Present):
+        		 tca9545.write_control_register(TCA9545_CONFIG_BUS0)
+
+    		ToutsideHumidity, ToutsideTemperature, crc_checkH, crc_checkT = sht30.read_humidity_temperature_crc()
+                
+
+		if (crc_checkH !=  -1) and (crc_checkT != -1):
+                    outsideTemperature = ToutsideTemperature
+                    outsideHumidity = ToutsideHumidity
+                    state.currentOutsideTemperature = outsideTemperature
+                    state.currentOutsideHumidity = outsideHumidity
+	        if (config.SWDEBUG == True):
+                    print "SHT30 Stats: (g,br,bc,rt,pc)", sht30.read_status_info()
+
 
 	if (config.WeatherUnderground_Present == True):
 
@@ -1584,12 +1639,13 @@ def checkForButtons():
 print returnStatusLine("SkyCam",config.Camera_Present)
 print returnStatusLine("DS3231",config.DS3231_Present)
 print returnStatusLine("HDC1080",config.HDC1080_Present)
+print returnStatusLine("SHT30",config.SHT30_Present)
 print returnStatusLine("AM2315",config.AM2315_Present)
 print returnStatusLine("ADS1015",config.ADS1015_Present)
 print returnStatusLine("ADS1115",config.ADS1115_Present)
 print returnStatusLine("AS3935",config.AS3935_Present)
 print returnStatusLine("OLED",config.OLED_Present)
-print returnStatusLine("SunAirPlus",config.SunAirPlus_Present)
+print returnStatusLine("SunAirPlus/SunControl",config.SunAirPlus_Present)
 print returnStatusLine("SI1145 Sun Sensor",config.Sunlight_Present)
 print returnStatusLine("TSL2591 Sun Sensor",config.TSL2591_Present)
 print returnStatusLine("DustSensor",config.DustSensor_Present)
diff --git a/WeatherUnderground.py b/WeatherUnderground.py
index 6a5f1cf..5157c17 100644
--- a/WeatherUnderground.py
+++ b/WeatherUnderground.py
@@ -41,7 +41,7 @@ def sendWeatherUndergroundData( as3935LightningCount, as3935, as3935LastInterrup
 
 	myURL += "&rainin=%0.2f" % ((rain60Minutes)/25.4)
 	myURL += "&dailyrainin=%0.2f" % ((totalRain)/25.4)
-	myURL += "&baromin=%0.2f" % ((bmp180SeaLevel) * 0.2953)
+	myURL += "&baromin=%0.2f" % ((bmp180SeaLevel) * 0.2953)/10.0
 
 	myURL += "&indoortempf=%0.2f" % ((HTUtemperature*9.0/5.0)+32.0)
 	myURL += "&indoorhumidity%0.2f=" % HTUhumidity
diff --git a/config.py b/config.py
index 31a524c..fda6c27 100644
--- a/config.py
+++ b/config.py
@@ -79,6 +79,7 @@
 BMP280_Present = False
 BME680_Present = False
 HDC1080_Present = False
+SHT30_Present = False
 AM2315_Present = False
 ADS1015_Present = False
 ADS1115_Present = False
@@ -108,6 +109,7 @@
 rainPin = 13
 
 
+SHT30GSPIN = 6
 AM2315GSPIN = 6
 
 # for fan
diff --git a/static/skycamera.jpg b/static/skycamera.jpg
new file mode 100644
index 0000000..1cc79eb
Binary files /dev/null and b/static/skycamera.jpg differ
diff --git a/testSHT30.py b/testSHT30.py
new file mode 100644
index 0000000..decf215
--- /dev/null
+++ b/testSHT30.py
@@ -0,0 +1,59 @@
+#!/usr/bin/env python
+import sys
+sys.path.append('./SDL_Pi_TCA9545')
+
+import SDL_Pi_TCA9545
+
+
+
+
+################
+# TCA9545 I2C Mux 
+
+#/*=========================================================================
+#    I2C ADDRESS/BITS
+#    -----------------------------------------------------------------------*/
+TCA9545_ADDRESS =                         (0x73)    # 1110011 (A0+A1=VDD)
+#/*=========================================================================*/
+
+#/*=========================================================================
+#    CONFIG REGISTER (R/W)
+#    -----------------------------------------------------------------------*/
+TCA9545_REG_CONFIG            =          (0x00)
+#    /*---------------------------------------------------------------------*/
+
+TCA9545_CONFIG_BUS0  =                (0x01)  # 1 = enable, 0 = disable 
+TCA9545_CONFIG_BUS1  =                (0x02)  # 1 = enable, 0 = disable 
+TCA9545_CONFIG_BUS2  =                (0x04)  # 1 = enable, 0 = disable 
+TCA9545_CONFIG_BUS3  =                (0x08)  # 1 = enable, 0 = disable 
+
+#/*=========================================================================*/
+
+# I2C Mux TCA9545 Detection
+try:
+        tca9545 = SDL_Pi_TCA9545.SDL_Pi_TCA9545(addr=TCA9545_ADDRESS, bus_enable = TCA9545_CONFIG_BUS0)
+
+
+        # turn I2CBus 0 on
+        tca9545.write_control_register(TCA9545_CONFIG_BUS0)
+        TCA9545_I2CMux_Present = True
+except:
+        print ">>>>>>>>>>>>>>>>>>><<<<<<<<<<<"
+        print "TCA9545 I2C Mux Not Present" 
+        print ">>>>>>>>>>>>>>>>>>><<<<<<<<<<<"
+
+
+sys.path.append('./SDL_Pi_SHT30')
+
+import SHT30
+thsen = SHT30.SHT30(powerpin=6)
+
+while (1):
+	print "T   ", thsen.read_temperature()
+	print "H   ", thsen.read_humidity()
+	print "H,T ", thsen.read_humidity_temperature()
+	print "H,T,C ", thsen.read_humidity_temperature_crc()
+        h,t,cH,cT = thsen.read_humidity_temperature_crc()
+        print "CRCH=0x%02x" % cH
+        print "CRCT=0x%02x" % cT
+