diff --git a/tasmota/berry/zigbee/tubezb_cc2652_flasher.be b/tasmota/berry/zigbee/tubezb_cc2652_flasher.be
new file mode 100644
index 000000000..f96d7b8a6
--- /dev/null
+++ b/tasmota/berry/zigbee/tubezb_cc2652_flasher.be
@@ -0,0 +1,176 @@
+
+#################################################################################
+#
+# class `sonoff_zb_pro_flasher`
+#
+#################################################################################
+
+class tubezb_cc2652_flasher
+  static CCFG_address = 0x057FD8
+  static CCFG_reference = 0xC5FE0FC5    # DIO 15 for BSL
+
+  #################################################################################
+  # Flashing from Intel HEX files
+  #################################################################################
+  var filename          # filename of hex file
+  var f                 # file object
+  var file_checked       # was the file already parsed. It cannot be flashed if not previously parsed and validated
+  var file_validated    # was the file already validated. It cannot be flashed if not previously parsed and validated
+  var file_hex          # intelhex object
+  var flasher           # low-level flasher object (cc2652_flasher instance)
+
+  def init()
+    self.file_checked = false
+    self.file_validated = false
+  end
+
+  def load(filename)
+    import intelhex
+
+    if type(filename) != 'string'   raise "value_error", "invalid file name" end
+    self.filename = filename
+    self.file_hex = intelhex(filename)    # prepare the parser object
+    self.file_checked = false
+    self.file_validated = false
+  end
+
+  #################################################################################
+  # check that the HEX file is valid
+  # parse it completely once, and verify some values
+  #################################################################################
+  def check()
+    self.file_hex.parse(/ -> self._check_pre(),
+                        / address, len, data, offset -> self._check_cb(address, len, data, offset),
+                        / -> self._check_post()
+                        )
+  end
+
+  #################################################################################
+  # Flash the firmware to the device
+  #
+  #################################################################################
+  def flash()
+    if !self.file_checked
+      print("FLH: firmware not checked, use `cc.check()`")
+      raise "flash_error", "firmware not checked"
+    end
+    if !self.file_validated
+      print("FLH: firmware not validated, use `cc.check()`")
+      raise "flash_error", "firmware not validated"
+    end
+
+    import cc2652_flasher   # this stops zigbee and configures serial
+    self.flasher = cc2652_flasher
+
+    try
+      self.file_hex.parse(/ -> self._flash_pre(),
+                          / address, len, data, offset -> self._flash_cb(address, len, data, offset),
+                          / -> self._flash_post()
+                          )
+    except .. as e, m
+      self.file_checked = false
+      self.file_validated = false
+      raise e, m
+    end
+  end
+
+  #################################################################################
+  # Dump firmware to local file
+  #
+  #################################################################################
+  def dump_to_file(filename)
+    import cc2652_flasher   # this stops zigbee and configures serial
+    self.flasher = cc2652_flasher
+    print("FLH: Dump started (takes 3 minutes during which Tasmota is unresponsive)")
+    self.flasher.start()
+    self.flasher.ping()
+    self.flasher.flash_dump_to_file(filename, 0x000000, 0x58000)
+    print("FLH: Dump completed")
+  end
+
+  #################################################################################
+  # low-level
+  #################################################################################
+  def _flash_pre()
+    print("FLH: Flashing started (takes 5 minutes during which Tasmota is unresponsive)")
+    self.flasher.start()
+    self.flasher.ping()
+    # erase flash
+    self.flasher.flash_erase()
+  end
+
+  def _flash_post()
+    print("FLH: Flashing completed: OK")
+    var flash_crc = self.flasher.cmd_crc32(0x0,0x30000)
+    print("FLH: Flash crc32 0x000000 - 0x2FFFF = " + str(flash_crc));
+    # tasmota.log("FLH: Verification of HEX file OK", 2)
+  end
+
+  def _flash_cb(addr, sz, data, offset)
+    var payload = data[offset .. offset + sz - 1]
+
+    # final check
+    if size(payload) != sz    raise "flash_error", "incomplete payload" end
+
+    self.flasher.flash_write(addr, payload)
+  end
+
+
+  # start verification (log only)
+  def _check_pre()
+    print("FLH: Starting verification of HEX file")
+    # tasmota.log("FLH: Starting verification of HEX file", 2)
+  end
+
+  # don't flash so ignore data
+  # check CCFG at location 0x57FD8 (4 bytes)
+  def _check_cb(addr, sz, data, offset)
+    # import string
+
+    # check than sz is a multiple of 4
+    if (sz % 4 != 0)
+      import string
+      raise "value_error", string.format("size of payload is not a mutliple of 4: 0x%06X", addr)
+    end
+
+    # print(string.format("> addr=0x%06X sz=0x%02X data=%s", addr, sz, data[offset..offset+sz-1]))
+    var CCFG = self.CCFG_address
+    if addr <= CCFG && addr+sz > CCFG+4
+      # we have CCFG in the buffer
+      var ccfg_bytes = data.get(4 + CCFG - addr, 4)
+
+      if ccfg_bytes != self.CCFG_reference
+        import string
+        raise "value_error", string.format("incorrect CCFG, BSL is not set to DIO_8 LOW (0x%08X expected 0x%08X)", ccfg_bytes, self.CCFG_reference) end
+      self.file_validated = true    # if we are here, it means that the file looks correct
+    end
+  end
+
+  def _check_post()
+    print("FLH: Verification of HEX file OK")
+    # tasmota.log("FLH: Verification of HEX file OK", 2)
+    self.file_checked = true
+  end
+
+end
+
+return tubezb_cc2652_flasher()
+
+
+#-
+# Flash local firmware
+
+import sonoff_zb_pro_flasher as cc
+cc.load("SonoffZBPro_coord_20220219.hex")
+cc.check()
+cc.flash()
+
+-#
+
+#-
+# Dump local firmware
+
+import sonoff_zb_pro_flasher as cc
+cc.dump_to_file("SonoffZBPro_dump.bin")
+
+-#
diff --git a/tasmota/tasmota_xdrv_driver/xdrv_23_zigbee_7_0_statemachine.ino b/tasmota/tasmota_xdrv_driver/xdrv_23_zigbee_7_0_statemachine.ino
index 34e97ec14..08211a1d0 100644
--- a/tasmota/tasmota_xdrv_driver/xdrv_23_zigbee_7_0_statemachine.ino
+++ b/tasmota/tasmota_xdrv_driver/xdrv_23_zigbee_7_0_statemachine.ino
@@ -473,7 +473,7 @@ static const Zigbee_Instruction zb_prog[] PROGMEM = {
     ZI_MQTT_STATE(ZIGBEE_STATUS_STARTING, kConfiguredCoord)
     ZI_ON_ERROR_GOTO(ZIGBEE_LABEL_ABORT)          // set any failure to ABORT
     ZI_SEND(ZBS_STARTUPFROMAPP)                   // start coordinator
-    ZI_WAIT_RECV(5000, ZBR_STARTUPFROMAPP)        // wait for sync ack of command
+    ZI_WAIT_RECV(10000, ZBR_STARTUPFROMAPP)        // wait for sync ack of command
     ZI_WAIT_UNTIL_FUNC(20000, AREQ_STARTUPFROMAPP, &ZNP_ReceiveStateChange)      // wait for async message that coordinator started, max 20s
     ZI_GOTO(ZIGBEE_LABEL_COORD_STARTED)
 
@@ -493,7 +493,7 @@ static const Zigbee_Instruction zb_prog[] PROGMEM = {
     ZI_WAIT_RECV(2000, ZBR_W_BDB_CHANN_OK)
     // all is good, we can start
     ZI_SEND(ZBS_BDB_START_COMMIS)                 // start coordinator
-    ZI_WAIT_RECV(5000, ZBR_BDB_START_COMMIS)      // wait for sync ack of command
+    ZI_WAIT_RECV(10000, ZBR_BDB_START_COMMIS)      // wait for sync ack of command
     ZI_WAIT_UNTIL_FUNC(20000, AREQ_STARTUPFROMAPP, &ZNP_ReceiveStateChange)      // wait for async message that coordinator started, max 20s
 
   // ======================================================================