Initial public release of WII5 Buoy firmware

Firmware for an autonomous wave-measurement buoy (ATmega2560-based
WII5 v2 board). Reads wave motion from a Sparton AHRS-M1/M2 IMU,
samples GPS and battery state, and reports back over Iridium SBD
satellite telemetry. Originally developed 2012-2024.

This is the first public release. Code, documentation, and field-tested
operating modes (Capture, Sleep, Position, ManualTest, SelfTest,
LowBattery) are licensed under Apache 2.0 — see LICENSE and NOTICE.

See README.md for an overview and build instructions, CONTRIBUTING.md
for how to contribute, and DEPLOYMENTS.md for the field-deployment log.

tools/build_upload.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+# SPDX-License-Identifier: Apache-2.0
+# Copyright (c) 2012-2024 Scott Penrose <scottp@dd.com.au> and WII5 Buoy contributors
+#
+# This file is part of WII5 Buoy firmware.
+# See LICENSE for full terms.
+
+# Verify the sketch with the Arduino IDE, then rsync the resulting hex to a
+# remote build host. Configure with env vars (or copy to a *.local.sh and edit):
+: "${WII5_ARDUINO_BIN:=arduino}"            # path to Arduino IDE binary
+: "${WII5_BUILD_DIR:?set to your Arduino build dir}"
+: "${WII5_AVRDUDE_CONF:?path to avrdude.conf}"
+: "${WII5_REMOTE:?e.g. user@host}"
+: "${WII5_REMOTE_PORT:=22}"
+
+"$WII5_ARDUINO_BIN" \
+	--verify app/wii5_buoy/wii5_buoy.ino \
+	--board WII:avr:wii5_v2_2560_3V:cpu=atmega25603V3_11MHz230400
+
+rsync -av -e "ssh -p $WII5_REMOTE_PORT" \
+	"$WII5_AVRDUDE_CONF" "$WII5_BUILD_DIR"/*.hex \
+	"$WII5_REMOTE:~/firmware/"