Hello, KmanOz. I have just received 8 new Sonoffs to replace all of my existing wired cable. I found that when I turned on all of my Sonoffs at the same time, half of them start working within a minute but the remaining others take more than ten minutes to start working. But after the unpredictable time all Sonoffs works perfectly and become very stable. I looked into Mosquitto log file. I could not see anything wrong. Then I extracted the log file and posted below in case I look over something that caused my trouble. I also use FTDI cable to plug into Sonoff Switch and called Arduino IDE Serial Monitor. When I type AT command, It does not respond to what I typed in. But I could still upload both versions of your Firmware successfully. If you could possibly take a look into the log below. I would highly appreciate. May I also ask you one more question, Is it possible if I could change Esp8266 from Access Point mode to Station mode. It is because I have a lot of Access Points listed on public WiFi, I am afraid all of my Sonoff access points would disturb my very nice neighbors. Thank you very much for your precious time. Have a nice day.
1472061174: New client connected from 192.1472077023: mosquitto version 1.3.4 (build date 2014-08-22 06:10:51+0000) starting
1472077023: Config loaded from /etc/mosquitto/mosquitto.conf.
1472077023: Opening ipv4 listen socket on port 1883.
1472077023: Opening ipv6 listen socket on port 1883.
1472077080: New connection from 192.168.1.41 on port 1883.
1472077080: New client connected from 192.168.1.41 as Sonoff_Living_Room_2 (c1, k90, uparnupong).
1472077080: New connection from 192.168.1.45 on port 1883.
1472077080: New client connected from 192.168.1.45 as Sonoff_Living_Room_10 (c1, k90, uparnupong).
1472077080: New connection from 192.168.1.49 on port 1883.
1472077080: New client connected from 192.168.1.49 as Sonoff_Living_Room_8 (c1, k90, uparnupong).
1472077081: New connection from 192.168.1.43 on port 1883.
1472077081: New client connected from 192.168.1.43 as Sonoff_Living_Room_v1.0t (c1, k90, uparnupong).
1472077081: New connection from 192.168.1.36 on port 1883.
1472077081: New client connected from 192.168.1.36 as Sonoff_Living_Room_3 (c1, k90, uparnupong).
1472079979: New connection from 192.168.1.48 on port 1883.
1472079979: New connection from 192.168.1.44 on port 1883.
1472079979: New client connected from 192.168.1.48 as Sonoff_Living_Room_9 (c1, k90, uparnupong).
1472079979: New client connected from 192.168.1.44 as Sonoff_Living_Room_5 (c1, k90, uparnupong).
1472080550: New connection from 192.168.1.51 on port 1883.
1472080550: New client connected from 192.168.1.51 as Sonoff_Living_Room_7 (c1, k90, uparnupong).
1472081523: New connection from 192.168.1.40 on port 1883.
1472081523: New client connected from 192.168.1.40 as home-assistant-1 (c1, k60, uparnupong).
1472081568: New connection from 192.168.1.45 on port 1883.
1472081568: Client Sonoff_Living_Room_10 already connected, closing old connection.
1472081568: New client connected from 192.168.1.45 as Sonoff_Living_Room_10 (c1, k90, uparnupong).
1472081568: New connection from 192.168.1.36 on port 1883.
1472081568: New connection from 192.168.1.49 on port 1883.
1472081568: Client Sonoff_Living_Room_8 already connected, closing old connection.
1472081568: New client connected from 192.168.1.49 as Sonoff_Living_Room_8 (c1, k90, uparnupong).
1472081568: Client Sonoff_Living_Room_3 already connected, closing old connection.
1472081568: New client connected from 192.168.1.36 as Sonoff_Living_Room_3 (c1, k90, uparnupong).
1472081568: New connection from 192.168.1.48 on port 1883.
1472081568: Client Sonoff_Living_Room_9 already connected, closing old connection.
1472081568: New client connected from 192.168.1.48 as Sonoff_Living_Room_9 (c1, k90, uparnupong).
1472081569: New connection from 192.168.1.47 on port 1883.
1472081569: New client connected from 192.168.1.47 as Sonoff_Living_Room_11 (c1, k90, uparnupong).
1472081626: Socket error on client Sonoff_Living_Room_2, disconnecting.
1472081626: Socket error on client Sonoff_Living_Room_5, disconnecting.
1472081626: Socket error on client Sonoff_Living_Room_7, disconnecting.
1472081632: New connection from 192.168.1.51 on port 1883.
1472081632: New client connected from 192.168.1.51 as Sonoff_Living_Room_7 (c1, k90, uparnupong).
1472081659: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1472081758: New connection from 192.168.1.41 on port 1883.
1472081758: New client connected from 192.168.1.41 as Sonoff_Living_Room_2 (c1, k90, uparnupong).
1472081758: New connection from 192.168.1.44 on port 1883.
1472081758: New client connected from 192.168.1.44 as Sonoff_Living_Room_5 (c1, k90, uparnupong).
1472083460: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1472084102: New connection from 192.168.1.42 on port 1883.
1472084102: New client connected from 192.168.1.42 as Sonoff_Living_Room_4 (c1, k90, uparnupong).
1472084129: Client Sonoff_Living_Room_10 has exceeded timeout, disconnecting.
1472085261: Saving in-memory database to /var/lib/mosquitto/mosquitto.db.
1472086486: Client Sonoff_Living_Room_2 has exceeded timeout, disconnecting.
1472086488: Client Sonoff_Living_Room_3 has exceeded timeout, disconnecting.