From 85f742d903cd414d86244d75a10f3c0d95fa76c0 Mon Sep 17 00:00:00 2001
From: Stephan Hadinger <stephan.hadinger@gmail.com>
Date: Thu, 22 Apr 2021 16:51:11 +0200
Subject: [PATCH] Zigbee Fix loading previous file

---
 tasmota/xdrv_23_zigbee_4c_devices.ino | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tasmota/xdrv_23_zigbee_4c_devices.ino b/tasmota/xdrv_23_zigbee_4c_devices.ino
index b87f4e0e1..70bfc53c4 100644
--- a/tasmota/xdrv_23_zigbee_4c_devices.ino
+++ b/tasmota/xdrv_23_zigbee_4c_devices.ino
@@ -290,6 +290,14 @@ bool loadZigbeeDevices(void) {
   if (!f.valid() && dfsp) {
     file = dfsp->open(TASM_FILE_ZIGBEE, "r");
     if (file) {
+      uint32_t signature = 0x0000;
+      file.read((uint8_t*)&signature, 4);
+      if (signature == ZIGB_NAME2) {
+        // skip another 4 bytes
+        file.read((uint8_t*)&signature, 4);
+      } else {
+        file.seek(0);  // seek back to beginning of file
+      }
       f.init(&file);
       storage_class = PSTR("File System");
     }