1. Download the APP of TC421, you can click the link:
http://www.ljs-tech.com/UploadFile/Word/20174261758113838680.rar
2. Please upzip this file on your phone, and click the file of TimerController.apk to

install.
3. Power on TC421, and then its display screen will show AP...
4. Turn on WIFI function on your phone, search the WIFI SSID (smarttimmer xxx）of TC421,

and click and connect it.
5. After that, you can enjoy it.

STA mode:
1. After the above 4th step in the AP mode, add the account no. and passwords of your

router in the connection interface, and then choose the proper encryption verification, and

ckick to connect the network.After that, the TC421 screen will show STA..., and you can go

to next step after it show the normal time.
2. Clear out the APP background program.
3. Connect WIFI to your router, and open the APP again, then you can see the TC421 device

in this APP, which means that it connects properly, so you can program, preview and

download.

Note: It is normal that your phone can't search the signal of TC421 in the STA mode, as its

SSID is hidden in this mode. You can use it without any worry. If it fails to connect,

please press the MENU button for long, and restore to AP mode, and then try to reset it and

see whether it can work normally or not.