diff --git a/schema/MCU_board/MCU_board.kicad_pcb b/schema/MCU_board/MCU_board.kicad_pcb
index be3db04..93f925d 100644
--- a/schema/MCU_board/MCU_board.kicad_pcb
+++ b/schema/MCU_board/MCU_board.kicad_pcb
@@ -80,11 +80,11 @@
   (net 3 "Net-(J1-Pad2)")
   (net 4 "unconnected-(J2-Pad4)")
   (net 5 "Net-(J3-Pad1)")
-  (net 6 "Net-(U1-Pad19)")
-  (net 7 "Net-(U1-Pad16)")
-  (net 8 "Net-(U1-Pad18)")
+  (net 6 "Net-(J4-Pad1)")
+  (net 7 "Net-(J4-Pad2)")
+  (net 8 "Net-(U1-Pad12)")
   (net 9 "Net-(J5-Pad2)")
-  (net 10 "Net-(U1-Pad17)")
+  (net 10 "Net-(J4-Pad4)")
   (net 11 "unconnected-(U1-Pad1)")
   (net 12 "unconnected-(U1-Pad10)")
   (net 13 "unconnected-(U1-Pad4)")
@@ -94,7 +94,7 @@
   (net 17 "unconnected-(U1-Pad8)")
   (net 18 "unconnected-(U1-Pad9)")
   (net 19 "unconnected-(U1-Pad11)")
-  (net 20 "unconnected-(U1-Pad12)")
+  (net 20 "unconnected-(U1-Pad19)")
   (net 21 "unconnected-(U1-Pad20)")
   (net 22 "unconnected-(U1-Pad26)")
   (net 23 "unconnected-(U1-Pad21)")
@@ -194,13 +194,13 @@
     (fp_line (start -1.27 -0.635) (end -0.635 -1.27) (layer "F.Fab") (width 0.1) (tstamp b9e8f347-eccd-4214-803b-8ac43dc4f01d))
     (fp_line (start -0.635 -1.27) (end 1.27 -1.27) (layer "F.Fab") (width 0.1) (tstamp d5c13442-53ed-4176-8456-af31aa40dd48))
     (pad "1" thru_hole rect (at 0 0) (size 1.7 1.7) (drill 1) (layers *.Cu *.Mask)
-      (net 10 "Net-(U1-Pad17)") (pinfunction "GND") (pintype "power_in") (tstamp 62703dfb-2b62-46cc-88d3-8bcce1262b07))
+      (net 6 "Net-(J4-Pad1)") (pinfunction "GND") (pintype "power_in") (tstamp 62703dfb-2b62-46cc-88d3-8bcce1262b07))
     (pad "2" thru_hole oval (at 0 2.54) (size 1.7 1.7) (drill 1) (layers *.Cu *.Mask)
-      (net 7 "Net-(U1-Pad16)") (pinfunction "VCC") (pintype "power_in") (tstamp c8b019d7-0440-4702-b7bc-0c6e98e593c6))
+      (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 6 "Net-(U1-Pad19)") (pinfunction "SDA") (pintype "bidirectional") (tstamp fa36be4e-7de9-478f-a4ef-c229ac16c103))
+      (net 8 "Net-(U1-Pad12)") (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-Pad18)") (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 20 "unconnected-(U1-Pad12)") (pinfunction "GPIO12") (pintype "bidirectional+no_connect") (tstamp bd87c8ae-c0f8-478e-afa3-98b6cb999a88))
+      (net 8 "Net-(U1-Pad12)") (pinfunction "GPIO12") (pintype "bidirectional") (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)
@@ -464,13 +464,13 @@
     (pad "15" thru_hole circle (at 0 35.56) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
       (net 1 "Net-(D1-Pad1)") (pinfunction "Vin") (pintype "power_in") (tstamp 2c430825-f89e-46dd-92c0-a1eb7a4e3d36))
     (pad "16" thru_hole circle (at 25.4 35.56) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
-      (net 7 "Net-(U1-Pad16)") (pinfunction "3.3V") (pintype "power_out") (tstamp c567d4b7-eb8f-474d-bcf2-046b5758a4ae))
+      (net 7 "Net-(J4-Pad2)") (pinfunction "3.3V") (pintype "power_out") (tstamp c567d4b7-eb8f-474d-bcf2-046b5758a4ae))
     (pad "17" thru_hole circle (at 25.4 33.02) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
-      (net 10 "Net-(U1-Pad17)") (pinfunction "GND") (pintype "power_in") (tstamp 8382be0b-64da-434d-b3bb-5bc1d436be2d))
+      (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 8 "Net-(U1-Pad18)") (pinfunction "GPIO15") (pintype "bidirectional") (tstamp fbd23587-9e1b-4461-b511-2257604d25ff))
+      (net 10 "Net-(J4-Pad4)") (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 6 "Net-(U1-Pad19)") (pinfunction "GPIO2") (pintype "bidirectional") (tstamp 73012d62-09f7-4e13-998e-800cf36a3c2b))
+      (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))
     (pad "21" thru_hole circle (at 25.4 22.86) (size 1.8 1.8) (drill 0.9) (layers *.Cu *.Mask)
@@ -774,15 +774,19 @@
   (segment (start 143.51 54.61) (end 142.24 53.34) (width 0.25) (layer "B.Cu") (net 3) (tstamp 8b014bea-020e-4c32-8a2e-afb44e577967))
   (segment (start 143.51 67.31) (end 143.51 54.61) (width 0.25) (layer "B.Cu") (net 3) (tstamp a9881c4d-1698-40b0-8ef8-bcb44452f73f))
   (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 180.34 91.44) (end 175.26 86.36) (width 0.25) (layer "B.Cu") (net 6) (tstamp 306ed877-4502-4466-9f5b-eb8b08088171))
+  (segment (start 175.1375 91.44) (end 180.2175 86.36) (width 0.25) (layer "F.Cu") (net 6) (tstamp 343c5230-2143-4adb-ae08-17c61d26bb28))
+  (segment (start 180.2175 86.36) (end 180.34 86.36) (width 0.25) (layer "F.Cu") (net 6) (tstamp 443afc8a-7367-472e-86b7-88f28e70e7a6))
   (segment (start 180.2175 88.9) (end 180.34 88.9) (width 0.25) (layer "F.Cu") (net 7) (tstamp e709a026-ae63-4f05-a831-e970e04110d6))
   (segment (start 175.1375 93.98) (end 180.2175 88.9) (width 0.25) (layer "F.Cu") (net 7) (tstamp eeaf6148-fd6c-43f2-a2c8-748ea0cfbde0))
-  (segment (start 180.34 93.98) (end 175.26 88.9) (width 0.25) (layer "B.Cu") (net 8) (tstamp dd673796-7a32-4f1f-b0c5-d2e15bb16cfe))
+  (segment (start 170.18 96.52) (end 160.02 86.36) (width 0.25) (layer "F.Cu") (net 8) (tstamp 0ba3fcf8-07bd-443d-be28-f69a4ad80df4))
+  (segment (start 175.26 96.52) (end 170.18 96.52) (width 0.25) (layer "F.Cu") (net 8) (tstamp 207932d1-3fbf-4bd3-8ef6-a6601aaaae72))
+  (segment (start 180.34 91.44) (end 175.26 96.52) (width 0.25) (layer "F.Cu") (net 8) (tstamp d433e10e-a10c-42c7-9409-f756ab1084a2))
+  (via (at 160.02 86.36) (size 0.8) (drill 0.4) (layers "F.Cu" "B.Cu") (net 8) (tstamp 2f8ebbbf-0f11-4a15-9648-1d28e5593127))
+  (segment (start 160.02 86.36) (end 149.7375 86.36) (width 0.25) (layer "B.Cu") (net 8) (tstamp 88f2670e-1113-4ed9-b644-cfdac6e8b249))
   (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 175.1375 91.44) (end 180.2175 86.36) (width 0.25) (layer "F.Cu") (net 10) (tstamp 343c5230-2143-4adb-ae08-17c61d26bb28))
-  (segment (start 180.2175 86.36) (end 180.34 86.36) (width 0.25) (layer "F.Cu") (net 10) (tstamp 443afc8a-7367-472e-86b7-88f28e70e7a6))
+  (segment (start 180.34 93.98) (end 175.26 88.9) (width 0.25) (layer "B.Cu") (net 10) (tstamp dd673796-7a32-4f1f-b0c5-d2e15bb16cfe))
   (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))
diff --git a/schema/MCU_board/MCU_board.kicad_prl b/schema/MCU_board/MCU_board.kicad_prl
index 41e2012..0ca1ae8 100644
--- a/schema/MCU_board/MCU_board.kicad_prl
+++ b/schema/MCU_board/MCU_board.kicad_prl
@@ -1,6 +1,6 @@
 {
   "board": {
-    "active_layer": 0,
+    "active_layer": 31,
     "active_layer_preset": "All Layers",
     "auto_track_width": true,
     "hidden_nets": [],
diff --git a/schema/MCU_board/MCU_board.kicad_sch b/schema/MCU_board/MCU_board.kicad_sch
index cfc71a9..af5928e 100644
--- a/schema/MCU_board/MCU_board.kicad_sch
+++ b/schema/MCU_board/MCU_board.kicad_sch
@@ -599,6 +599,7 @@
   )
 
   (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))
   (no_connect (at 104.14 85.09) (uuid 7a036c8b-424e-4cd3-9042-9dd09fe44aab))
@@ -607,7 +608,6 @@
   (no_connect (at 55.88 85.09) (uuid 7a036c8b-424e-4cd3-9042-9dd09fe44ab0))
   (no_connect (at 55.88 87.63) (uuid 7a036c8b-424e-4cd3-9042-9dd09fe44ab1))
   (no_connect (at 55.88 92.71) (uuid 7a036c8b-424e-4cd3-9042-9dd09fe44ab3))
-  (no_connect (at 55.88 95.25) (uuid 7a036c8b-424e-4cd3-9042-9dd09fe44ab4))
   (no_connect (at 55.88 67.31) (uuid 7a036c8b-424e-4cd3-9042-9dd09fe44abb))
   (no_connect (at 55.88 74.93) (uuid 7a036c8b-424e-4cd3-9042-9dd09fe44abc))
   (no_connect (at 55.88 77.47) (uuid 7a036c8b-424e-4cd3-9042-9dd09fe44abd))
@@ -633,10 +633,6 @@
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 0b437303-3880-4c2e-936f-36b72f5e5c8c)
   )
-  (wire (pts (xy 113.03 105.41) (xy 110.49 105.41))
-    (stroke (width 0) (type default) (color 0 0 0 0))
-    (uuid 0fbcf9fb-bb57-456a-8653-a4c4bb03bb9f)
-  )
   (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)
@@ -673,6 +669,10 @@
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 5f6cca41-50ca-4ee1-8224-0e6c495b17fd)
   )
+  (wire (pts (xy 102.87 105.41) (xy 102.87 106.68))
+    (stroke (width 0) (type default) (color 0 0 0 0))
+    (uuid 6aa9c80e-1912-43b9-a8eb-b3770c197706)
+  )
   (wire (pts (xy 104.14 97.79) (xy 107.95 97.79))
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 6bcce826-921a-46ac-9369-b842f7a0419f)
@@ -681,10 +681,6 @@
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 6ef72d17-b82e-4eb1-b202-9006955a067e)
   )
-  (wire (pts (xy 110.49 105.41) (xy 110.49 95.25))
-    (stroke (width 0) (type default) (color 0 0 0 0))
-    (uuid 72a4f775-0bac-4378-9cd2-066589a746ab)
-  )
   (wire (pts (xy 55.88 102.87) (xy 53.34 102.87))
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 7c612bdd-6a82-4fcf-baa9-8fdefcb06f1d)
@@ -697,6 +693,14 @@
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 854f4387-3ca1-4ede-a296-fb94988ed5ae)
   )
+  (wire (pts (xy 102.87 106.68) (xy 54.61 106.68))
+    (stroke (width 0) (type default) (color 0 0 0 0))
+    (uuid 93d2313f-0919-4c6f-b07d-ab630442d056)
+  )
+  (wire (pts (xy 54.61 106.68) (xy 54.61 95.25))
+    (stroke (width 0) (type default) (color 0 0 0 0))
+    (uuid 957ba4db-aa36-4e4d-bd34-5b618c123340)
+  )
   (wire (pts (xy 55.88 97.79) (xy 46.99 97.79))
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 9751e2d6-d81e-44e0-b624-fc92d289c52a)
@@ -705,6 +709,10 @@
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid 9918ed3d-ef60-4f9c-bbab-d5a94c54dede)
   )
+  (wire (pts (xy 54.61 95.25) (xy 55.88 95.25))
+    (stroke (width 0) (type default) (color 0 0 0 0))
+    (uuid 9b6983ab-5e08-4595-9719-d4ecbaaf3e69)
+  )
   (wire (pts (xy 104.14 100.33) (xy 113.03 100.33))
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid b439c5aa-7a69-4a25-90c0-d6b8c216ef49)
@@ -725,10 +733,6 @@
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid cb54d583-7e30-4069-8a8b-0ae032abbdcc)
   )
-  (wire (pts (xy 104.14 95.25) (xy 110.49 95.25))
-    (stroke (width 0) (type default) (color 0 0 0 0))
-    (uuid ce0cef7c-e77e-4ae8-8427-97604cbd0d43)
-  )
   (wire (pts (xy 55.88 72.39) (xy 52.07 72.39))
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid d19fc569-63e1-438f-8951-de7a890123ae)
@@ -745,6 +749,10 @@
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid e15ae67b-2c04-433b-9d01-93c6a63abb6c)
   )
+  (wire (pts (xy 113.03 105.41) (xy 102.87 105.41))
+    (stroke (width 0) (type default) (color 0 0 0 0))
+    (uuid e6e65e08-50ae-42e3-98ba-61e01e0d282e)
+  )
   (wire (pts (xy 107.95 107.95) (xy 107.95 97.79))
     (stroke (width 0) (type default) (color 0 0 0 0))
     (uuid e786ce55-4e74-4e2d-aa0a-f19cd837f06e)