Upgraded firmware for Simone Giertz's Every Day Calendar that links an ATProto-powered ESP32, for sync with goals.garden 🌱
Add ESP32-S2 board support with auto I2C pin detection
Support both ESP32-S3 and ESP32-S2 QT Py boards. I2C pins are
auto-detected based on CONFIG_IDF_TARGET, so switching boards
only requires changing the `board =` line in platformio.ini.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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firmware/esp32/GoalsGardenSync/config.h
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firmware/esp32/GoalsGardenSync/config.h
···
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#endif
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// I2C pins for communication with calendar
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// QT Py ESP32-S3: STEMMA QT connector to Calendar's J2 header (SDA/SCL)
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#define CALENDAR_I2C_SDA 41 // ESP32 STEMMA QT SDA (GPIO41) -> Calendar J2 SDA
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#define CALENDAR_I2C_SCL 40 // ESP32 STEMMA QT SCL (GPIO40) -> Calendar J2 SCL
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// STEMMA QT connector to Calendar's J2 header (SDA/SCL)
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#if defined(CONFIG_IDF_TARGET_ESP32S2)
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// QT Py ESP32-S2
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#define CALENDAR_I2C_SDA 7
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#define CALENDAR_I2C_SCL 6
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#elif defined(CONFIG_IDF_TARGET_ESP32S3)
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// QT Py ESP32-S3
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#define CALENDAR_I2C_SDA 41
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#define CALENDAR_I2C_SCL 40
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#else
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// Default/fallback - override in config.local.h if needed
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#define CALENDAR_I2C_SDA SDA
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#define CALENDAR_I2C_SCL SCL
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#endif
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// Legacy serial pins (no longer used - I2C is more reliable)
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// #define CALENDAR_RX_PIN 5
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platformio.ini
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platformio.ini
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; ============================================
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; Goals Garden Sync - ESP32-S3 (Adafruit QT Py or similar)
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; Goals Garden Sync - ESP32 (Adafruit QT Py or similar)
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; ============================================
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; Supported boards - just change the 'board' line:
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; adafruit_qtpy_esp32s3_nopsram - QT Py ESP32-S3 (no PSRAM)
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; adafruit_qtpy_esp32s2 - QT Py ESP32-S2
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; I2C pins are auto-detected based on the board.
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[env:esp32sync]
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platform = espressif32
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board = esp32-s3-devkitc-1
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board = adafruit_qtpy_esp32s3_nopsram
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framework = arduino
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monitor_speed = 115200
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upload_speed = 921600
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build_flags =
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-DBUILD_ESP32SYNC
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-DARDUINO_USB_CDC_ON_BOOT=1
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-DARDUINO_USB_MODE=1
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; Enable USB CDC Serial (required for native USB boards)
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board_build.cdc_on_boot = 1
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; Script to add framework library include paths for external lib compilation
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extra_scripts = pre:add_includes.py