Add a platformio.ini file, for those so inclined

.gitignore

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+.pio

platformio.ini

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+; PlatformIO Project Configuration File
+; https://docs.platformio.org/page/projectconf.html
+
+[env:watchy]
+platform = espressif32
+framework = arduino
+
+; The current arduino-ESP32 platform (2.0.3) seems to have issues with
+; esp_sleep_get_wakeup_cause() not working right, leading to boot loops.
+; Pin to the previous version (2.0.2) which works better.
+platform_packages = framework-arduinoespressif32 @ 3.20002.220503
+
+board = esp32dev  ; TODO: Make a board definition for Watchy?
+board_build.partitions = min_spiffs.csv
+board_build.hwids = 10C4, EA60  ; The CP2102N used on Watchy
+monitor_speed = 115200
+
+lib_ldf_mode = deep+  ; Needed to plumb the depths of library dependencies
+lib_deps =
+    https://github.com/GuruSR/Olson2POSIX.git
+    https://github.com/GuruSR/SmallNTP.git
+    https://github.com/GuruSR/SmallRTC.git
+    https://github.com/GuruSR/StableBMA.git
+    https://github.com/tzapu/WiFiManager.git  ; unused, needed to build Watchy
+    sqfmi/Watchy
+
+;;; For debugging, try these
+; build_type = debug
+; monitor_filters = esp32_exception_decoder