Sensor network stuff works now

lib/car_os/pps.py

@@ -13,15 +13,24 @@ class PPS:
         self.gps_set = False
         self._pps_offset = [0, 0, 0, 0]
         self._utc = [0, 0, 0]
+        self._previous_timestamp = 0
+        self._previous_utc_h = 0
         
     def update(self):
         current_time = time.monotonic_ns()
-        self.previous_value = self.current_value
         self.current_value = self.gpio.value
         if not self.current_value and self.previous_value:
             self._update_time = current_time
             self._pps_offset = [0, 0, 0, 0]
             self._utc[2] = self._utc[2] + 1
+        self.previous_value = self.current_value
+        current_timestamp = self.utc_timestamp
+        if self._previous_utc_h == 23 and self.utc[0] == 0:
+            current_timestamp += 86400
+        delta = current_timestamp - self._previous_timestamp
+        self._previous_timestamp = current_timestamp
+        self._previous_utc_h = self.utc[0]
+        return max(0, delta)
     
     def update_from_gps(self, gps):
         self._utc[0] = gps.time[0]
@@ -46,4 +55,8 @@ class PPS:
         m, s = divmod(self._pps_offset[2] + self._utc[2], 60)
         h, m = divmod(self._pps_offset[1] + self._utc[1] + m, 60)
         _, h = divmod(self._pps_offset[0] + self._utc[0] + h, 24)
-        return (h, m, s, self._pps_offset[3])
+        return (h, m, s, self._pps_offset[3])
+    
+    @property
+    def utc_timestamp(self):
+        return self.utc[0] * 3600 + self.utc[1] * 60 + self.utc[2] + (self.utc[3] / 1_000_000_000)