diff --git a/src/google/sheet.py b/src/google/sheet.py
index 0beaab5..b0c871d 100644
--- a/src/google/sheet.py
+++ b/src/google/sheet.py
@@ -15,7 +15,7 @@ class Spreadsheet:
     def __init__(self):
         self._id = ''
         self._range = ''
-        self._url_params = 'insertDataOption=INSERT_ROWS&valueInputOption=RAW'
+        self._url_params = 'insertDataOption=INSERT_ROWS&valueInputOption=USER_ENTERED'
         self._url_template = 'https://sheets.googleapis.com/v4/spreadsheets/%s/values/%s:append?%s'
         self._sa = None
 
@@ -46,3 +46,4 @@ def append_values(self, values):
 
         print('spreadsheet: response:')
         print(response.text)
+
diff --git a/src/main.py b/src/main.py
index 3d54414..230abcd 100644
--- a/src/main.py
+++ b/src/main.py
@@ -11,10 +11,13 @@ class WeatherHandler:
     def __init__(self, spreadsheet):
         self.spreadsheet = spreadsheet
 
-    def handle(self, t, h):
-        print('temperature = %.2f' % t)
+    def handle(self, c, f, h, now):
+        f = int(f)
+        print('centigrade  = %.2f' % c)
+        print('farenheit   = %.2f' % f)
         print('humidity    = %.2f' % h)
-        spreadsheet.append_values([t, h])
+        print('now         = %s' % now)
+        spreadsheet.append_values([c, f, h, now])
 
 # required imports
 from weather import Weather
@@ -92,3 +95,4 @@ def handle(self, t, h):
             print('achtung! something wrong happened! ignoring ...')
 
     time.sleep(1) # in seconds
+
diff --git a/src/weather.py b/src/weather.py
index cb596ef..ed2ec22 100644
--- a/src/weather.py
+++ b/src/weather.py
@@ -4,6 +4,7 @@
 import util
 
 # the class controls a DHT22 sensor which measures temperature and humidity
+
 class Weather:
 
     # initilizes an instance of Weather with the following parameters
@@ -14,20 +15,33 @@ def __init__(self, pin, interval, handler = None):
         self.last_measurement = time.ticks_ms()
         self.dht22 = dht.DHT22(machine.Pin(pin))
         self.interval = util.string_to_millis(interval)
+        self.iterations = 0
         self.handler = handler
 
     # mesures temperature and humidity
     def measure(self):
         self.dht22.measure()
-        t = self.dht22.temperature()
+        c = self.dht22.temperature()
         h = self.dht22.humidity()
+        f = (c * 1.8) + 32
+        now = "=TIMESTAMP_TO_DATE(INDIRECT(\"A\" & ROW()))"
         if self.handler != None:
-            self.handler.handle(t, h)
+            self.handler.handle(c, f, h, now)
 
     # checks if it's time to measure temperature and humidity
     def check(self):
         current_time = time.ticks_ms()
         deadline = time.ticks_add(self.last_measurement, self.interval)
-        if time.ticks_diff(deadline, current_time) <= 0:
+        if ((time.ticks_diff(deadline, current_time) <= 0) or (self.iterations == 0)):
             self.measure()
+            self.iterations += 1
             self.last_measurement = current_time
+
+# the following function, when added to the google sheet (Tools > Script editor) allows the
+# formula uploaded in the "now" variable (see "measure(self)") to calculate a local timestamp
+# from the epoch value loaded in column A of the inserted row
+#
+#function TIMESTAMP_TO_DATE(value) {
+#  return new Date(value * 1000);
+#}
+# see the sheets.py file to set the ValueInputOption to USER_INPUT to avoid now string value being prefixed with a '