From 361aa481daf2be0bc5d1b45b7c4dc3a7e9780665 Mon Sep 17 00:00:00 2001
From: Nicu Hodos <nicu@hodos.ro>
Date: Tue, 25 Oct 2022 17:21:13 +0200
Subject: [PATCH] reverse engineer protocol 1 value

---
 gateway/include/RcDecoder.h | 40 +++++++++++++++++++++++++++++++++++++
 gateway/src/gateway.cpp     | 12 +++++++++--
 2 files changed, 50 insertions(+), 2 deletions(-)
 create mode 100644 gateway/include/RcDecoder.h

diff --git a/gateway/include/RcDecoder.h b/gateway/include/RcDecoder.h
new file mode 100644
index 0000000..f3b59cf
--- /dev/null
+++ b/gateway/include/RcDecoder.h
@@ -0,0 +1,40 @@
+#define RC_STATE(value) value & 0x1
+#define RC_DEVICE(value) (value >> 1) & 0x1F
+#define RC_GROUP(value) (value >> 6) & 0x1F
+
+namespace RcDecoder {
+
+    struct RcSwitch {
+        bool state;
+        char group;
+        char device;
+    };
+
+    void decode(unsigned long value, RcSwitch decoded) {
+        value = value >> 2;
+        unsigned long res = 0;
+        for (int i = 0; i < 12; i++) {
+            res |= ((value & 1) ^ 1) << i;
+            value = value >> 2;
+        }
+        decoded.state = RC_STATE(res);
+        decoded.group = RC_GROUP(res);
+        switch (RC_DEVICE(res)) {
+        case 0b10000:
+            decoded.device = 1;
+            break;
+        case 0b01000:
+            decoded.device = 2;
+            break;
+        case 0b00100:
+            decoded.device = 3;
+            break;
+        case 0b00010:
+            decoded.device = 4;
+            break;
+        case 0b00001:
+            decoded.device = 5;
+            break;
+        }
+    }
+}
\ No newline at end of file
diff --git a/gateway/src/gateway.cpp b/gateway/src/gateway.cpp
index 876cdef..0ed9238 100644
--- a/gateway/src/gateway.cpp
+++ b/gateway/src/gateway.cpp
@@ -4,7 +4,7 @@
 #include "Tiny.h"
 #include <ArduinoJson.h>
 #include "Dht.h"
-
+#include "RcDecoder.h"
 
 #define RESET_PIN 10
 #define SEND_PIN 11
@@ -95,7 +95,15 @@ void readRcSwitch(JsonDocument& jsonDoc) {
 		}
 		JsonObject rcSwitch = jsonDoc.createNestedObject("rcSwitch");
 		rcSwitch["protocol"] = mySwitch.getReceivedProtocol();
-		rcSwitch["value"] = value;
+		if (mySwitch.getReceivedProtocol() == 1) {
+			RcDecoder::RcSwitch decoded;
+			RcDecoder::decode(value, decoded);
+			rcSwitch["state"] = decoded.state;
+			rcSwitch["group"] = decoded.group;
+			rcSwitch["channel"] = decoded.device;
+		} else {
+			rcSwitch["value"] = value;
+		}
 	}
 }