diff --git a/.gitignore b/.gitignore
index 610489c..5ee527b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,3 +23,6 @@ desktop.ini
 
 # Python
 __pycache__/
+
+# Test pictures
+Pictures/bitmaps
diff --git a/.vscode/extensions.json b/.vscode/extensions.json
index f2e4f92..a91ca8f 100644
--- a/.vscode/extensions.json
+++ b/.vscode/extensions.json
@@ -1,5 +1,11 @@
 {
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
     "recommendations": [
         "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack",
+        "pioarduino.pioarduino-ide"
     ]
 }
diff --git a/CAD files/acryl scherm.pdf b/CAD files/acryl scherm.pdf
new file mode 100644
index 0000000..01798f9
Binary files /dev/null and b/CAD files/acryl scherm.pdf differ
diff --git a/CAD files/acryl scherm.step b/CAD files/acryl scherm.step
new file mode 100644
index 0000000..35d861e
--- /dev/null
+++ b/CAD files/acryl scherm.step	
@@ -0,0 +1,639 @@
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+'Maximum model space distance between geometric entities at asserted c
+onnectivities');
+#535=UNCERTAINTY_MEASURE_WITH_UNIT(LENGTH_MEASURE(0.01),#538,
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+#536=(
+GEOMETRIC_REPRESENTATION_CONTEXT(3)
+GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT((#534))
+GLOBAL_UNIT_ASSIGNED_CONTEXT((#538,#539,#540))
+REPRESENTATION_CONTEXT('','3D')
+);
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+LENGTH_UNIT()
+NAMED_UNIT(*)
+SI_UNIT(.MILLI.,.METRE.)
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+NAMED_UNIT(*)
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+SI_UNIT($,.RADIAN.)
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+#540=(
+NAMED_UNIT(*)
+SI_UNIT($,.STERADIAN.)
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+);
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+#547=PRODUCT_RELATED_PRODUCT_CATEGORY('Assembly v18','Assembly v18',(#551));
+#548=APPLICATION_PROTOCOL_DEFINITION('international standard',
+'automotive_design',2009,#549);
+#549=APPLICATION_CONTEXT(
+'Core Data for Automotive Mechanical Design Process');
+#550=PRODUCT_CONTEXT('part definition',#549,'mechanical');
+#551=PRODUCT('Assembly','Assembly v18',$,(#550));
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+#559=SURFACE_STYLE_USAGE(.BOTH.,#564);
+#560=SURFACE_STYLE_USAGE(.BOTH.,#565);
+#561=SURFACE_STYLE_USAGE(.BOTH.,#566);
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+#567=SURFACE_STYLE_FILL_AREA(#572);
+#568=SURFACE_STYLE_FILL_AREA(#573);
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+#570=SURFACE_STYLE_FILL_AREA(#575);
+#571=SURFACE_STYLE_FILL_AREA(#576);
+#572=FILL_AREA_STYLE('Steel - Satin',(#577));
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diff --git a/CAD files/controlboard holder left v2.stl b/CAD files/controlboard holder left v2.stl
new file mode 100644
index 0000000..4b24d0a
Binary files /dev/null and b/CAD files/controlboard holder left v2.stl differ
diff --git a/CAD files/controlboard holder right v2.stl b/CAD files/controlboard holder right v2.stl
new file mode 100644
index 0000000..4ec5e57
Binary files /dev/null and b/CAD files/controlboard holder right v2.stl differ
diff --git a/CAD files/controlboard holder right.stl b/CAD files/controlboard holder right.stl
new file mode 100644
index 0000000..1339952
Binary files /dev/null and b/CAD files/controlboard holder right.stl differ
diff --git a/CAD files/esp holder.stl b/CAD files/esp holder.stl
new file mode 100644
index 0000000..5b2edf4
Binary files /dev/null and b/CAD files/esp holder.stl differ
diff --git a/CAD files/psu holder v2.stl b/CAD files/psu holder v2.stl
new file mode 100644
index 0000000..7cc2ad1
Binary files /dev/null and b/CAD files/psu holder v2.stl differ
diff --git a/CAD files/spacer 3mm.stl b/CAD files/spacer 3mm.stl
new file mode 100644
index 0000000..2cc491c
Binary files /dev/null and b/CAD files/spacer 3mm.stl differ
diff --git a/CAD files/standoff.stl b/CAD files/standoff.stl
new file mode 100644
index 0000000..03ad453
Binary files /dev/null and b/CAD files/standoff.stl differ
diff --git a/Pictures/20220115_144416.jpg b/Pictures/20220115_144416.jpg
new file mode 100644
index 0000000..23ac81d
Binary files /dev/null and b/Pictures/20220115_144416.jpg differ
diff --git a/Pictures/20220117_110806.jpg b/Pictures/20220117_110806.jpg
new file mode 100644
index 0000000..9b48a76
Binary files /dev/null and b/Pictures/20220117_110806.jpg differ
diff --git a/Pictures/Screenshot 2026-10-14 174616.png b/Pictures/Screenshot 2026-10-14 174616.png
new file mode 100644
index 0000000..f9f4b47
Binary files /dev/null and b/Pictures/Screenshot 2026-10-14 174616.png differ
diff --git a/README.md b/README.md
index 8a31526..ddea789 100644
--- a/README.md
+++ b/README.md
@@ -305,23 +305,23 @@ The serial protocol is described in [src/nano/README.md](src/nano/README.md).
 
 ## TODO
 
-- [ ] **Install the recovery app** (one-time USB flash, see
+- [X] **Install the recovery app** (one-time USB flash, see
   [One-time installation](#one-time-installation-usb)). Until then the ESP32 runs the old
   flash layout: the clock firmware works, but without the recovery app; the Home
   Assistant sensor shows "no recovery app".
-- [ ] **Test the web UI on the real hardware**: live view, uploading and drawing a bitmap,
+- [X] **Test the web UI on the real hardware**: live view, uploading and drawing a bitmap,
   live mode, choosing a page, settings, Home Assistant settings (restart).
 - [ ] **Test the recovery app on the real hardware**: the Home Assistant button, the setup
   WiFi with a wrong WiFi password, 3 quick power cycles, and an OTA upload into it.
 
-- [ ] **Rewire the Nano link to UART2.** The firmware now uses `Serial2` (GPIO 16/17)
+- [X] **Rewire the Nano link to UART2.** The firmware now uses `Serial2` (GPIO 16/17)
   instead of `Serial` (GPIO 1/3). Move the ESP32 TX wire from GPIO 1 to **GPIO 17** before
   you flash this firmware, or the display gets no data. See
   [Wiring between ESP32 and Nano](#wiring-between-esp32-and-nano).
 - [ ] **Add the reply wire:** Nano D1 (TX) → voltage divider → ESP32 GPIO 16 (RX2). With it,
   the ESP sends the first frame as soon as the Nano is ready, instead of after 3 s, and
   the Nano can be flashed over WiFi (`nano_ota`).
-- [ ] **Test flashing over WiFi on the real hardware.** The uploader is tested against a
+- [X] **Test flashing over WiFi on the real hardware.** The uploader is tested against a
   simulated bootloader, not yet against the real Nano. Check especially that the old
   bootloader starts after the relay power cycle.
 - [ ] **Check the boot timing.** Build the Nano with `MEASURE_REFRESH` to see how long a
diff --git a/platformio.ini b/platformio.ini
index 93da5e7..6e08f69 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -59,7 +59,7 @@ platform = espressif32
 board = esp32doit-devkit-v1
 ; factory = recovery app, ota_0 / ota_1 = clock firmware (see partitions.csv)
 board_build.partitions = partitions.csv
-monitor_port = COM11
+monitor_port = COM18
 
 [env:esp32]
 extends = esp32_common
@@ -81,7 +81,7 @@ upload_port = 10.1.1.198
 [env:esp32_usb]
 extends = env:esp32
 upload_protocol = esptool
-upload_port = COM11
+upload_port = COM18
 board_upload.offset_address = 0x110000
 
 ; ---------------------------------------------------------------------------
@@ -101,7 +101,7 @@ build_src_filter =
 ; ESPSERIAL: status messages are sent to the Nano like in the clock firmware
 build_flags = -D ESPSERIAL -I src/esp32
 upload_protocol = esptool
-upload_port = COM11
+upload_port = COM18
 
 ; ---------------------------------------------------------------------------
 ; Unit tests on the PC (pio test -e test_nano -e test_esp32)