From 70f76ba1073b7f122bce07f8c5ba3b26b250f834 Mon Sep 17 00:00:00 2001
From: "victor.fraile" <victor.fraile@mesavault.es>
Date: Wed, 25 Mar 2026 15:49:04 +0000
Subject: [PATCH] =?UTF-8?q?A=C3=B1adir=20lsn50-v2-xkc-y25-v-drainage/docs/?=
 =?UTF-8?q?decoder-pa12.md?=
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+# Decoder PA12
+
+## Decisión final
+
+El decoder correcto para leer `PA12` en este kit es:
+
+- byte objetivo: `byte6`
+- bit objetivo: `bit1`
+- máscara: `0x02`
+
+Expresión correcta:
+
+```js
+const byte6 = (b.length > 6) ? b[6] : 0x00;
+const pa12 = (byte6 & 0x02) ? 1 : 0;
+
+
+function decodeUplink(input) {
+  const b = input.bytes;
+  const byte6 = (b.length > 6) ? b[6] : 0;
+  const pa12 = (byte6 & 0x02) ? 1 : 0;
+
+  return {
+    data: {
+      pa12,
+      drenaje: pa12,
+      drenaje_inv: pa12 ? 0 : 1,
+      byte6,
+      raw_hex: b.map(x => x.toString(16).padStart(2, '0')).join('')
+    }
+  };
+}
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