1. connect TC421 with APP.

2. config wifi information on APP.

3. connect PC to wifi network, by WiFi or Ethernet are all OK.

4. search device on software

AS PWM feature, TC420 and TC421, and almost other PWN dimmer,

when adjust light brightness, the output Voltage and Current is both changing, not static, not same as input voltage,

when dim the light lower brightness, voltage and current will all down, please know, thanks.

TC420 is a popular using LED timer controller, can control like to OFF/ON, or dimming according to time. widely used in Fish tank, aquarium, plant growing, and so on.

TC421 is a WiFi connection LED timer programmable light controller,

it can programmed on Android or IOS smartphone,

widely used in fast tank, or bigger aquarium,

can control the LED light power on, power off, dim, fade like timer.

TC421 is the upgrade vision of time controller TC421, add new program method by cellphone, via Wifi connecting, IOS and Android support, and can be connected to the PC which in the same network by wireless.

TC421 is the upgrade vision of time controller TC420, add new program method by cellphone, via Wifi connecting, IOS and Android support, and can be connected to the PC which in the same network by wireless.