Moved SCL to GPIO4 because boot fails if it's connected to GPIO12

Added temperature and altitude to data logger
Added periodic log flush to avoid data loss

ESP32/src/DataLogger.cpp

@@ -72,6 +72,13 @@ void DataLogger::log(unsigned long timeMilliseconds, const Entry& entry)
 		sprintf(line, "%.3f,%.3f,%.3f,%.3f,%.1f,%.1f\n", currentTime, entry.speed, entry.batteryVoltage, entry.batteryOutputCurrent, entry.temperature, entry.altitude);
 		file.print(line);
 
+		if(currentTime >= lastFlushTime + 10.0f)
+		{
+			// we need to flush often enough, because the system is typically powered off right after arrival to destination
+			file.flush();
+			lastFlushTime = currentTime;
+		}
+
 		lastEntry = entry;
 		lastLogTime = currentTime;
 	}

ESP32/src/DataLogger.h

@@ -44,6 +44,7 @@ private:
 	unsigned long lastTimeMilliseconds = -1;
 	float currentTime = 0.0f;
 	float lastLogTime = 0.0f;
+	float lastFlushTime = 0.0f;
 
 	File file; // @suppress("Abstract class cannot be instantiated")
 };

ESP32/src/vehicle-monitor.cpp

@@ -27,7 +27,7 @@ Dps310 pressureSensor = Dps310();
 const int8_t speedSensorPin = 13;
 const int8_t debugLedPin = 2;
 const int8_t I2C_SDA = 15;
-const int8_t I2C_SCL = 12;
+const int8_t I2C_SCL = 4;
 
 const float wheelDiameterInches = 20;
 const int numImpulsesPerTurn = 2;
@@ -383,6 +383,8 @@ void loop()
 	entry.batteryVoltage = (float)batteryVoltage / 1000.0f;
 	entry.batteryOutputCurrent = (float)batteryOutputCurrent / 1000.0f;
 	entry.speed = getSpeed();
+	entry.temperature = (float)temperature / 10.0f;
+	entry.altitude = (float)altitude / 1000.0f;
 
 	if(entry.speed > 0.0f)
 	{

schema/MCU_board/MCU_board.kicad_pcb

@@ -82,9 +82,9 @@
   (net 5 "Net-(J3-Pad1)")
   (net 6 "Net-(J4-Pad1)")
   (net 7 "Net-(J4-Pad2)")
-  (net 8 "Net-(U1-Pad12)")
+  (net 8 "Net-(J4-Pad3)")
   (net 9 "Net-(J5-Pad2)")
-  (net 10 "Net-(U1-Pad18)")
+  (net 10 "Net-(J4-Pad4)")
   (net 11 "unconnected-(U1-Pad1)")
   (net 12 "unconnected-(U1-Pad10)")
   (net 13 "unconnected-(U1-Pad4)")
@@ -95,7 +95,7 @@
   (net 18 "unconnected-(U1-Pad9)")
   (net 19 "unconnected-(U1-Pad11)")
   (net 20 "unconnected-(U1-Pad19)")
-  (net 21 "unconnected-(U1-Pad20)")
+  (net 21 "unconnected-(U1-Pad12)")
   (net 22 "unconnected-(U1-Pad26)")
   (net 23 "unconnected-(U1-Pad21)")
   (net 24 "unconnected-(U1-Pad22)")
@@ -198,9 +198,9 @@
     (pad "2" thru_hole oval (at 0 2.54) (size 1.7 1.7) (drill 1) (layers *.Cu *.Mask)
       (net 7 "Net-(J4-Pad2)") (pinfunction "VCC") (pintype "power_in") (tstamp c8b019d7-0440-4702-b7bc-0c6e98e593c6))
     (pad "3" thru_hole oval (at 0 5.08) (size 1.7 1.7) (drill 1) (layers *.Cu *.Mask)
-      (net 10 "Net-(U1-Pad18)") (pinfunction "SDA") (pintype "bidirectional") (tstamp fa36be4e-7de9-478f-a4ef-c229ac16c103))
+      (net 8 "Net-(J4-Pad3)") (pinfunction "SDA") (pintype "bidirectional") (tstamp fa36be4e-7de9-478f-a4ef-c229ac16c103))
     (pad "4" thru_hole oval (at 0 7.62) (size 1.7 1.7) (drill 1) (layers *.Cu *.Mask)
-      (net 8 "Net-(U1-Pad12)") (pinfunction "SCL") (pintype "input") (tstamp fc991e31-8b48-465c-9197-72f4fa1bee7e))
+      (net 10 "Net-(J4-Pad4)") (pinfunction "SCL") (pintype "input") (tstamp fc991e31-8b48-465c-9197-72f4fa1bee7e))
     (model "${KICAD6_3DMODEL_DIR}/Connector_PinHeader_2.54mm.3dshapes/PinHeader_1x04_P2.54mm_Vertical.wrl"
       (offset (xyz 0 0 0))
       (scale (xyz 1 1 1))
@@ -456,7 +456,7 @@
     (pad "11" thru_hole circle (at 0 25.4) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
       (net 19 "unconnected-(U1-Pad11)") (pinfunction "GPIO14") (pintype "bidirectional+no_connect") (tstamp 03262628-1cc5-491d-862f-0eb1bd93094e))
     (pad "12" thru_hole circle (at 0 27.94) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
-      (net 8 "Net-(U1-Pad12)") (pinfunction "GPIO12") (pintype "bidirectional") (tstamp bd87c8ae-c0f8-478e-afa3-98b6cb999a88))
+      (net 21 "unconnected-(U1-Pad12)") (pinfunction "GPIO12") (pintype "bidirectional+no_connect") (tstamp bd87c8ae-c0f8-478e-afa3-98b6cb999a88))
     (pad "13" thru_hole circle (at 0 30.48) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
       (net 9 "Net-(J5-Pad2)") (pinfunction "GPIO13") (pintype "bidirectional") (tstamp dd9956f2-e1a3-43eb-b682-c9200e10a75b))
     (pad "14" thru_hole circle (at 0 33.02) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
@@ -468,11 +468,11 @@
     (pad "17" thru_hole circle (at 25.4 33.02) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
       (net 6 "Net-(J4-Pad1)") (pinfunction "GND") (pintype "power_in") (tstamp 8382be0b-64da-434d-b3bb-5bc1d436be2d))
     (pad "18" thru_hole circle (at 25.4 30.48) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
-      (net 10 "Net-(U1-Pad18)") (pinfunction "GPIO15") (pintype "bidirectional") (tstamp fbd23587-9e1b-4461-b511-2257604d25ff))
+      (net 8 "Net-(J4-Pad3)") (pinfunction "GPIO15") (pintype "bidirectional") (tstamp fbd23587-9e1b-4461-b511-2257604d25ff))
     (pad "19" thru_hole circle (at 25.4 27.94) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
       (net 20 "unconnected-(U1-Pad19)") (pinfunction "GPIO2") (pintype "bidirectional+no_connect") (tstamp 73012d62-09f7-4e13-998e-800cf36a3c2b))
     (pad "20" thru_hole circle (at 25.4 25.4) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
-      (net 21 "unconnected-(U1-Pad20)") (pinfunction "GPIO4") (pintype "bidirectional+no_connect") (tstamp 0dee7dc7-28b8-43a0-982f-9fa20c03186e))
+      (net 10 "Net-(J4-Pad4)") (pinfunction "GPIO4") (pintype "bidirectional") (tstamp 0dee7dc7-28b8-43a0-982f-9fa20c03186e))
     (pad "21" thru_hole circle (at 25.4 22.86) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
       (net 23 "unconnected-(U1-Pad21)") (pinfunction "RX2") (pintype "bidirectional+no_connect") (tstamp 790da2d6-8e50-4f89-a27a-5123b485dd01))
     (pad "22" thru_hole circle (at 25.4 20.32) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
@@ -742,7 +742,7 @@
   (dimension (type aligned) (layer "User.1") (tstamp a1df1579-7f98-456b-96b2-f2255e6a78f1)
     (pts (xy 139.7 109.22) (xy 139.7 43.18))
     (height -7.62)
-    (gr_text "66,0400 mm" (at 130.93 76.2 90) (layer "User.1") (tstamp a1df1579-7f98-456b-96b2-f2255e6a78f1)
+    (gr_text "66.0400 mm" (at 130.93 76.2 90) (layer "User.1") (tstamp a1df1579-7f98-456b-96b2-f2255e6a78f1)
       (effects (font (size 1 1) (thickness 0.15)))
     )
     (format (units 3) (units_format 1) (precision 4))
@@ -751,7 +751,7 @@
   (dimension (type aligned) (layer "User.1") (tstamp b74d18b6-0a0c-4ef4-b5e7-77a6be3fc614)
     (pts (xy 139.7 109.22) (xy 183 109.22))
     (height 5.08)
-    (gr_text "43,3000 mm" (at 161.35 113.15) (layer "User.1") (tstamp b74d18b6-0a0c-4ef4-b5e7-77a6be3fc614)
+    (gr_text "43.3000 mm" (at 161.35 113.15) (layer "User.1") (tstamp b74d18b6-0a0c-4ef4-b5e7-77a6be3fc614)
       (effects (font (size 1 1) (thickness 0.15)))
     )
     (format (units 3) (units_format 1) (precision 4))
@@ -776,16 +776,17 @@
   (segment (start 144.78 50.8) (end 144.78 53.34) (width 0.25) (layer "F.Cu") (net 5) (tstamp 5259d978-b387-4967-b81c-f641c98585a8))
   (segment (start 175.1375 91.44) (end 180.34 91.44) (width 0.25) (layer "F.Cu") (net 6) (tstamp e4195b8f-3996-4a59-b6a1-76534a4e174b))
   (segment (start 180.34 93.98) (end 175.1375 93.98) (width 0.25) (layer "F.Cu") (net 7) (tstamp 05a60061-f69f-4cf0-982b-3b600d194cef))
-  (segment (start 172.72 99.06) (end 160.02 86.36) (width 0.25) (layer "F.Cu") (net 8) (tstamp 63fcfc59-7439-416e-96ce-38a112eb4939))
+  (segment (start 175.1375 88.9) (end 177.8 88.9) (width 0.25) (layer "F.Cu") (net 8) (tstamp 9e5b0177-ea58-4f76-8b57-ff1c6e52d9df))
-  (segment (start 180.34 99.06) (end 172.72 99.06) (width 0.25) (layer "F.Cu") (net 8) (tstamp b982722b-1bf7-4726-a5b9-a2b33c43ad35))
+  (segment (start 177.8 96.52) (end 180.34 96.52) (width 0.25) (layer "F.Cu") (net 8) (tstamp dfa2c928-7d9a-4cd3-90db-112716296421))
-  (via (at 160.02 86.36) (size 0.8) (drill 0.4) (layers "F.Cu" "B.Cu") (net 8) (tstamp 60d76cd4-7135-41b5-bb14-f84115e2b595))
+  (via (at 177.8 88.9) (size 0.8) (drill 0.4) (layers "F.Cu" "B.Cu") (net 8) (tstamp b7340f23-0eaa-48ae-aea8-b5b53a0ae99a))
-  (segment (start 160.02 86.36) (end 149.7375 86.36) (width 0.25) (layer "B.Cu") (net 8) (tstamp 6f13e8dd-8f95-4897-aa4a-7af39b71330f))
+  (via (at 177.8 96.52) (size 0.8) (drill 0.4) (layers "F.Cu" "B.Cu") (net 8) (tstamp f630bdcd-b048-45d2-91a0-928349b89dad))
+  (segment (start 177.8 88.9) (end 177.8 96.52) (width 0.25) (layer "B.Cu") (net 8) (tstamp e8cb6cb3-dd2b-4328-8592-132e369ebb71))
   (segment (start 160.02 88.9) (end 149.7375 88.9) (width 0.25) (layer "B.Cu") (net 9) (tstamp 527346bb-ea73-4a6b-90c5-e15d8df2e57f))
   (segment (start 167.64 81.28) (end 160.02 88.9) (width 0.25) (layer "B.Cu") (net 9) (tstamp 8fd52544-866c-407e-990a-b7ff97bb39d0))
   (segment (start 167.64 48.26) (end 167.64 81.28) (width 0.25) (layer "B.Cu") (net 9) (tstamp e39b0b7f-91f8-45ca-b50b-563bff3dc7f3))
-  (segment (start 172.72 88.9) (end 175.1375 88.9) (width 0.25) (layer "F.Cu") (net 10) (tstamp 17bfb2da-c5fc-4e07-91e1-b9c5ab3fe262))
+  (segment (start 170.18 99.06) (end 170.18 83.82) (width 0.25) (layer "F.Cu") (net 10) (tstamp 45676199-bb82-4d58-98c1-b606deb355be))
-  (segment (start 180.34 96.52) (end 172.72 96.52) (width 0.25) (layer "F.Cu") (net 10) (tstamp 50e2510b-285f-450d-924c-851068760a2c))
+  (segment (start 180.34 99.06) (end 170.18 99.06) (width 0.25) (layer "F.Cu") (net 10) (tstamp 55ac7ee1-f461-406b-8cf5-da47a7717180))
-  (segment (start 172.72 96.52) (end 172.72 88.9) (width 0.25) (layer "F.Cu") (net 10) (tstamp c8b088e8-33f6-4063-86e4-a7b123b42783))
+  (segment (start 170.18 83.82) (end 175.1375 83.82) (width 0.25) (layer "F.Cu") (net 10) (tstamp b14aea3f-7e9b-4416-ac0e-1c7beb3cd27c))
   (segment (start 154.94 60.96) (end 149.7375 60.96) (width 0.25) (layer "F.Cu") (net 32) (tstamp 61e763ec-1c1c-4f1e-a003-f55d7ad04f9f))
   (segment (start 154.94 48.26) (end 154.94 60.96) (width 0.25) (layer "F.Cu") (net 32) (tstamp e5c077a6-2e6e-4ddb-9cdd-7189d5453897))
   (segment (start 144.78 63.5) (end 149.7375 63.5) (width 0.25) (layer "F.Cu") (net 33) (tstamp 30bfa64d-761b-4732-997d-bd4590e66c7b))

schema/MCU_board/MCU_board.kicad_prl

@@ -1,7 +1,7 @@
 {
   "board": {
     "active_layer": 0,
-    "active_layer_preset": "Toutes Couches",
+    "active_layer_preset": "All Layers",
     "auto_track_width": true,
     "hidden_nets": [],
     "high_contrast_mode": 0,

schema/MCU_board/MCU_board.kicad_sch

@@ -598,7 +598,6 @@
     (uuid 95ffd3f8-cc4e-49e8-a469-fe0ef795ac79)
   )
 
-  (no_connect (at 104.14 92.71) (uuid 42e27ade-eeba-4263-a787-39f108a3f5bf))
   (no_connect (at 104.14 95.25) (uuid 675b2a1e-1d1e-4f5b-91f1-23d348015a92))
   (no_connect (at 104.14 90.17) (uuid 7a036c8b-424e-4cd3-9042-9dd09fe44aa7))
   (no_connect (at 104.14 87.63) (uuid 7a036c8b-424e-4cd3-9042-9dd09fe44aa8))
@@ -620,6 +619,7 @@
   (no_connect (at 104.14 69.85) (uuid 8df7c71e-685c-43dd-af60-6f9cdc315f85))
   (no_connect (at 104.14 77.47) (uuid 8df7c71e-685c-43dd-af60-6f9cdc315f86))
   (no_connect (at 39.37 62.23) (uuid a6b973bf-3c82-4206-bae7-4f835d16d359))
+  (no_connect (at 55.88 95.25) (uuid e8a669b7-c663-4fa5-9b1f-ce9eb01dc726))
 
   (wire (pts (xy 52.07 48.26) (xy 52.07 72.39))
     (stroke (width 0) (type default) (color 0 0 0 0))
@@ -633,6 +633,10 @@
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 0b437303-3880-4c2e-936f-36b72f5e5c8c)
   )
+  (wire (pts (xy 110.49 107.95) (xy 113.03 107.95))
+    (stroke (width 0) (type default) (color 0 0 0 0))
+    (uuid 14b56486-a565-4ad2-9d4e-44e6442ea175)
+  )
   (wire (pts (xy 49.53 100.33) (xy 55.88 100.33))
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 1adb5de4-24a9-45d7-81f0-5bb173e17332)
@@ -661,10 +665,6 @@
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 4269b426-1ca0-4358-b7c8-f87d360b6b77)
   )
-  (wire (pts (xy 54.61 95.25) (xy 55.88 95.25))
-    (stroke (width 0) (type default) (color 0 0 0 0))
-    (uuid 457cdafe-757b-46b6-9d3e-8d438360f308)
-  )
   (wire (pts (xy 109.22 97.79) (xy 109.22 105.41))
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 58175922-1337-43ad-ad83-f2ad48af61c5)
@@ -705,13 +705,9 @@
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 9918ed3d-ef60-4f9c-bbab-d5a94c54dede)
   )
-  (wire (pts (xy 113.03 107.95) (xy 54.61 107.95))
+  (wire (pts (xy 104.14 92.71) (xy 110.49 92.71))
     (stroke (width 0) (type default) (color 0 0 0 0))
-    (uuid a89c5c87-c6cf-48f3-a098-73aaf195ccfc)
+    (uuid a7b396e8-387b-4006-982d-ca6acb770010)
-  )
-  (wire (pts (xy 54.61 107.95) (xy 54.61 95.25))
-    (stroke (width 0) (type default) (color 0 0 0 0))
-    (uuid aea22020-99fc-43b4-984a-a7253337aa40)
   )
   (wire (pts (xy 104.14 100.33) (xy 113.03 100.33))
     (stroke (width 0) (type default) (color 0 0 0 0))
@@ -745,6 +741,10 @@
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid db08d23b-92e3-4f99-8704-1a66ba98c4e9)
   )
+  (wire (pts (xy 110.49 92.71) (xy 110.49 107.95))
+    (stroke (width 0) (type default) (color 0 0 0 0))
+    (uuid dfa04c8b-bd8e-46e0-b63e-f2b2ac1e224a)
+  )
   (wire (pts (xy 49.53 48.26) (xy 52.07 48.26))
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid e15ae67b-2c04-433b-9d01-93c6a63abb6c)