From 244327de0b403f135f6863ef103fa7850515e6ce Mon Sep 17 00:00:00 2001
From: Fabrizio Amodio <32312585+ZioFabry@users.noreply.github.com>
Date: Wed, 13 Aug 2025 11:14:22 +0200
Subject: [PATCH] Fix LwDecode.be permit to disable duplicates hash (#23779)

---
 tasmota/berry/lorawan/decoders/LwDecode.be | 23 ++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/tasmota/berry/lorawan/decoders/LwDecode.be b/tasmota/berry/lorawan/decoders/LwDecode.be
index fd26edb99..f9c97d7f3 100644
--- a/tasmota/berry/lorawan/decoders/LwDecode.be
+++ b/tasmota/berry/lorawan/decoders/LwDecode.be
@@ -233,10 +233,6 @@ class lwdecode_cls
     var payload = device_info['Payload']
     if !payload || payload.size() == 0 return true end
 
-    var current_hash = self._calculate_payload_hash(payload)
-    if current_hash == self.last_payload_hash return true end
-    self.last_payload_hash = current_hash
-
     if !self.lw_decoders.find(decoder)
       try
         LwDeco = nil
@@ -244,14 +240,29 @@ class lwdecode_cls
         if LwDeco
           self.lw_decoders[decoder] = LwDeco
         else
+          log("LwD: Unable to load decoder",1)
           return true
         end
       except .. as e, m
-        print(format("Decoder load error: %s", m))
+        log(format("LwD: Decoder load error: %s", m),1)
         return true
       end
     end
 
+    var hashCheck
+    # check if the decoder driver have the hashCheck properties
+    try
+      hashCheck = self.lw_decoders[decoder].hashCheck
+    except .. as e, m
+      hashCheck = true
+    end
+    
+    if hashCheck
+      var current_hash = self._calculate_payload_hash(payload)
+      if current_hash == self.last_payload_hash return true end
+      self.last_payload_hash = current_hash
+    end
+
     try
       var decoded = self.lw_decoders[decoder].decodeUplink(
         device_info['Name'],
@@ -282,7 +293,7 @@ class lwdecode_cls
       tasmota.global.restart_flag = 0 # Signal LwDecoded successful (default state)
 
     except .. as e, m
-      print(format("Decode error for %s: %s", device_name, m))
+      log(format("LwD: Decode error for %s: %s", device_name, m),1)
     end
 
     return true