Flashing first the old firmware

index.html

@@ -19,4 +19,4 @@
 <tr><td colspan="3"><div align="center"><input type="submit" name="action" value="Reboot"></div></td></tr>
 </table></form>
 $ADDITIONAL_LINE
-</body></html>
+</body></html>

os/flash.sh

@@ -31,7 +31,10 @@ if [ $? -ne 0 ]; then
  echo "Error reading the MAC -> set the device into the bootloader!"
  exit 1
 fi
-
+echo "Flashing the old one"
+./esptool.py --port /dev/$DEVICE $BAUD write_flash 0x00000 0x00000.bin 0x10000 0x10000.bin
+sleep 1
+echo "Flashing the new"
 ./esptool.py --port /dev/$DEVICE $BAUD write_flash -fm dio 0x00000 nodemcu2.bin
 # 0x3fc000 esp_init_data_default_v08.bin 0x07e000 blank.bin 0x3fe000 blank.bin
 #./esptool.py --port /dev/$DEVICE $BAUD write_flash 0x00000 0x00000.bin 0x10000 0x10000.bin