Add Keeloq RF protocol (#5511)

esphome/components/remote_base/keeloq_protocol.h

@@ -0,0 +1,53 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "remote_base.h"
+
+namespace esphome {
+namespace remote_base {
+
+struct KeeloqData {
+  uint32_t encrypted;  // 32 bit encrypted field
+  uint32_t address;    // 28 bit serial number
+  uint8_t command;     // Button Status S2-S1-S0-S3
+  bool repeat;         // Repeated command bit
+  bool vlow;           // Battery status bit
+
+  bool operator==(const KeeloqData &rhs) const {
+    // Treat 0x10 as a special, wildcard button press
+    // This allows us to match on just the address if wanted.
+    if (address != rhs.address) {
+      return false;
+    }
+    return (rhs.command == 0x10 || command == rhs.command);
+  }
+};
+
+class KeeloqProtocol : public RemoteProtocol<KeeloqData> {
+ public:
+  void encode(RemoteTransmitData *dst, const KeeloqData &data) override;
+  optional<KeeloqData> decode(RemoteReceiveData src) override;
+  void dump(const KeeloqData &data) override;
+};
+
+DECLARE_REMOTE_PROTOCOL(Keeloq)
+
+template<typename... Ts> class KeeloqAction : public RemoteTransmitterActionBase<Ts...> {
+ public:
+  TEMPLATABLE_VALUE(uint32_t, address)
+  TEMPLATABLE_VALUE(uint32_t, encrypted)
+  TEMPLATABLE_VALUE(uint8_t, command)
+  TEMPLATABLE_VALUE(bool, vlow)
+
+  void encode(RemoteTransmitData *dst, Ts... x) override {
+    KeeloqData data{};
+    data.address = this->address_.value(x...);
+    data.encrypted = this->encrypted_.value(x...);
+    data.command = this->command_.value(x...);
+    data.vlow = this->vlow_.value(x...);
+    KeeloqProtocol().encode(dst, data);
+  }
+};
+
+}  // namespace remote_base
+}  // namespace esphome