Initial commit

include/power_manager.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include <Arduino.h>
+#include "data_model.h"
+
+void power_sender_init();
+void power_receiver_init();
+void read_battery(MeterData &data);
+void go_to_deep_sleep(uint32_t seconds);