Fist commit

src/platform/EspRelayBank.h

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+#pragma once
+
+#include <Arduino.h>
+
+#include <atomic>
+#include <cstdint>
+
+namespace timbre {
+
+class EspRelayBank {
+ public:
+  static constexpr std::uint8_t kPrincipal = 0;
+  static constexpr std::uint8_t kReserved = 1;
+  static constexpr std::uint8_t kChannelCount = 2;
+  static constexpr std::uint8_t kPrincipalPin = 22;
+  static constexpr std::uint8_t kReservedPin = 23;
+  static constexpr std::uint8_t kOffLevel = HIGH;
+  static constexpr std::uint8_t kOnLevel = LOW;
+
+  void beginSafe();
+  void set(std::uint8_t channel, bool energized);
+  void allOff();
+  bool energized(std::uint8_t channel) const;
+  bool validChannel(std::uint8_t channel) const;
+
+ private:
+  std::uint8_t pinFor(std::uint8_t channel) const;
+  std::atomic<std::uint8_t> stateMask_{0};
+  bool initialized_ = false;
+};
+
+}  // namespace timbre