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.

WII5ModeManualTest.h

@@ -0,0 +1,56 @@
+// 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.
+
+/**
+ * @file WII5ModeManualTest.h
+ * @brief Manual test mode: operator-driven hardware exercise via the console.
+ */
+
+#ifndef WII5ModeManualTest_h
+#define WII5ModeManualTest_h
+
+#include <Arduino.h>
+#include <WII5.h>
+#include <TimeLib.h>
+
+/**
+ * @brief Manual test mode: operator-driven hardware exercise.
+ *
+ * Provides a console REPL where the operator types single-letter
+ * commands ("X;", "G;", etc.) to exercise individual subsystems
+ * (LEDs, buttons, GPS, Iridium, Sparton, SD cards, etc.). Used in the
+ * lab and during pre-deployment checkout.
+ */
+class WII5ModeManualTest : public WII5Mode {
+  public:
+		WII5ModeManualTest() {}
+    /** @brief Reset internal counters. */
+    void reset();
+    /** @brief One-time bring-up. */
+    void begin();
+    /** @brief Tick: read console, dispatch one-shot test commands. */
+    void loop();
+    bool enableMetadata;
+    bool enableIridium;
+    bool enableGps;
+    bool enableSparton;
+    bool enableBattery;
+    bool waitGPS;
+
+    // virtual void metadataPrint(File* fh);
+
+  protected:
+    elapsedMillis wait;
+    uint8_t pulsePin;
+    elapsedMillis pulseWait;
+
+    // Lots of improvement...
+
+};
+
+extern WII5ModeManualTest wii5ModeManualTest;
+
+#endif