fix: reserve Indicator heap for BLE and WiFi

test/README.md

@@ -13,6 +13,7 @@ require integration or target testing; see "Local testing without hardware" in
 pio test -e native                      # all suites except KISS modem
 pio test -e native_kiss_modem           # KISS modem suite
 pio test -e native -f test_webconfig_keys   # a single suite
+python3 test/test_indicator_display_profile.py  # Indicator RAM/scale contract
 ```
 
 A green `[PASSED]` per suite means GoogleTest returned 0 (all assertions

test/test_indicator_display_profile.py

@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+
+import re
+from pathlib import Path
+import unittest
+
+
+ROOT = Path(__file__).resolve().parents[1]
+PROFILE = ROOT / "variants" / "sensecap_indicator-espnow" / "platformio.ini"
+DISPLAY = ROOT / "src" / "helpers" / "ui" / "LGFXDisplay.cpp"
+
+
+def base_profile() -> str:
+    text = PROFILE.read_text()
+    match = re.search(
+        r"^\[SenseCapIndicator-ESPNow\]\n(?P<body>.*?)(?=^\[)",
+        text,
+        re.MULTILINE | re.DOTALL,
+    )
+    if match is None:
+        raise AssertionError("SenseCap Indicator base profile is missing")
+    return match.group("body")
+
+
+def numeric_flag(name: str) -> float:
+    match = re.search(
+        rf"^\s*-D\s+{re.escape(name)}=(\S+)\s*$",
+        base_profile(),
+        re.MULTILINE,
+    )
+    if match is None:
+        raise AssertionError(f"{name} is missing from the Indicator profile")
+    return float(match.group(1).removesuffix("f"))
+
+
+class IndicatorDisplayProfileTest(unittest.TestCase):
+    def test_preserves_logical_ui_and_fills_panel(self):
+        panel_size = 480
+        zoom = numeric_flag("UI_ZOOM")
+        coordinate_scale = numeric_flag("UI_COORD_SCALE")
+
+        logical_size = panel_size / (zoom * coordinate_scale)
+        sprite_size = logical_size * coordinate_scale
+
+        self.assertEqual(logical_size, 160)
+        self.assertEqual(sprite_size, 320)
+        self.assertEqual(sprite_size * zoom, panel_size)
+
+    def test_internal_canvas_leaves_interface_headroom(self):
+        panel_size = 480
+        color_depth = numeric_flag("UI_BUFFER_COLOR_DEPTH")
+        zoom = numeric_flag("UI_ZOOM")
+        coordinate_scale = numeric_flag("UI_COORD_SCALE")
+        logical_size = panel_size / (zoom * coordinate_scale)
+        sprite_size = int(logical_size * coordinate_scale)
+
+        old_canvas_bytes = panel_size * panel_size * int(color_depth) // 8
+        canvas_bytes = sprite_size * sprite_size * int(color_depth) // 8
+
+        self.assertEqual(canvas_bytes, 51_200)
+        self.assertGreaterEqual(old_canvas_bytes - canvas_bytes, 64_000)
+        self.assertIn("buffer.setPsram(false);", DISPLAY.read_text())
+
+
+if __name__ == "__main__":
+    unittest.main()

variants/sensecap_indicator-espnow/README.md

@@ -1,11 +1,11 @@
 # SenseCAP Indicator controls
 
-The Indicator uses its full 480x480 panel resolution while preserving the
-existing 160x160 UI coordinate system. A 4-bit internal canvas avoids PSRAM
-contention with RGB scanout; text and icons are rendered directly at 3x detail
-instead of enlarging a completed 160x160 frame. The screen blanks after five
-minutes on USB power; the hardware button or a touch wakes it without
-selecting anything.
+The Indicator preserves the existing 160x160 UI coordinate system in a
+320x320, 4-bit internal canvas and scales it 1.5x onto the 480x480 panel. The
+canvas avoids PSRAM contention with RGB scanout while reserving enough internal
+RAM for Bluetooth and WiFi to operate together. The screen blanks after five
+minutes on USB power; the hardware button or a touch wakes it without selecting
+anything.
 
 ## Touch navigation
 

variants/sensecap_indicator-espnow/platformio.ini

@@ -20,11 +20,12 @@ build_flags =
   -D IO_EXPANDER=0x40
   -D IO_EXPANDER_IRQ=42
   -D DISPLAY_ROTATION=1
-  ; Render at the panel's native 480x480 resolution while preserving the
-  ; established 160x160 UI coordinate system. A 4-bit internal canvas avoids
-  ; competing with the RGB scanout framebuffer in PSRAM.
-  -D UI_ZOOM=1
-  -D UI_COORD_SCALE=3
+  ; Render the established 160x160 UI into a 320x320 internal canvas, then
+  ; scale it 1.5x onto the 480x480 panel. The 4-bit canvas stays out of PSRAM
+  ; to protect RGB scanout, but now consumes 51,200 instead of 115,200 bytes
+  ; of scarce internal RAM so BLE and WiFi can run together.
+  -D UI_ZOOM=1.5f
+  -D UI_COORD_SCALE=2
   -D UI_BUFFER_COLOR_DEPTH=4
   -D AUTO_OFF_MILLIS=300000UL
   -D USB_MESSAGE_PREVIEW_MILLIS=300000UL