Replace arduino-timer with PositionWatcher

lib/position_watcher/PositionWatcher.h

@@ -0,0 +1,31 @@
+#ifndef POSITION_WATCHER_H
+#define POSITION_WATCHER_H
+
+#include <stdint.h>
+
+class PositionWatcher
+{
+private:
+    bool isActive;
+
+    int8_t targetValue;
+    int8_t lastValue;
+    int8_t consecutiveDuplicates;
+
+    uint32_t pollingInterval;
+
+    int8_t maxAttempts;
+    int8_t maxConsecutiveDuplicates;
+
+    int8_t currentAttempt;
+    uint32_t lastPollTime;
+
+public:
+    void start(int8_t newTargetValue);
+    bool shouldFetch();
+    bool isWatching();
+    void fetchQueued();
+    void fetchReceived(int8_t value);
+};
+
+#endif // POSITION_WATCHER_H