mikecarper
5938cbe614
Add native-resolution Indicator UI, touch navigation, SD-backed pixel and emoji fonts, LoRa radio support, dual-slot WiFi Companion provisioning, and mesh clock fallback. Harden radio recovery and build defaults, normalize ESP32 setup-AP protocols, and document/test the operator workflows.
SenseCAP Indicator SD font
generate_font.py creates the native-resolution font used by the SenseCAP
Indicator. Text is Noto Sans Mono Bold rendered into an 18x24 monospaced cell.
Every text pixel is binary (0 or 255), so the font remains sharp and has no
antialiasing.
The complete Unicode Emoji 17.0 RGI set is rendered from Noto Color Emoji into 12x12 RGB332 cells. Transparency is binary, and each cell is enlarged 2x with nearest-neighbor scaling for a crisp 24x24 result on the 480x480 panel. Emoji sequences are mapped into the BMP private-use range by a trie appended to the font file because the display library's runtime font interface accepts 16-bit glyph identifiers. The private-use glyph is intercepted at draw time and the corresponding color cell is overlaid after the UI canvas is copied. On later UI refreshes, unchanged emoji pixels are excluded from the indexed canvas transfer. This preserves the already-presented color cell and avoids a visible fallback-to-color flash.
The generated ui-font.vlw is stored on the Indicator's SD card. The RP2040
font service streams it to the ESP32-S3 at boot; the application falls back to
its built-in font if the card, service, file, checksum, or mapping is invalid.
To reproduce the checked-in asset:
python3 -m venv /tmp/meshcore-font-venv
/tmp/meshcore-font-venv/bin/pip install -r tools/sensecap_indicator_font/requirements.txt
/tmp/meshcore-font-venv/bin/python tools/sensecap_indicator_font/generate_font.py \
--output variants/sensecap_indicator-espnow/sd/ui-font.vlw \
--preview /tmp/meshcore-indicator-font-preview.png
The source fonts are licensed under the SIL Open Font License 1.1; see
OFL-1.1.txt. The Unicode data source, pinned color-font revision, and exact
input hashes are recorded in the generated JSON manifest.