Review on 🏠 UCTRONICS DC 12V Programmable Time Delay Relay Module with LED Display for Smart Home Automation by Angela Campos

The timer is very versatile and powerful. However, the programming is almost a mystery due to incomplete documentation. Based on my limited experimentation, here is the beginning of an explanation of the four basic programming parameters. I hope the errors in my guesses will be corrected in the comments; look at these. MO - TIMER MODE. Set from 1 to 18 depending on how you want the timer to work (mode 10 turns on when triggered, followed by a programmable delay before turning off). T1 - FIRST PERIOD DELAY. Depending on the mode selected, this is the delay from the first time an input trigger is received until the second action is taken. See the diagrams accompanying the timer for further explanation. In mode 10, the flip-flop closes the output relay and T1 determines when the output relay opens. For mode 13, this is the delay from tripping to closing the relay. T1 in seconds. See NX to increase T2 - SECOND TIME DELAY. Depending on the selected mode, this begins after the delay time T1 has elapsed. T2 defines the delay until the next action. For mode 10 there is no next action, so the setting is irrelevant. For mode 13, this is the delay between the relay closing and opening. T2 in seconds. See NX for more details. NX - NUMERIC MULTIPLIER. Used to set T1 and/or T2 values greater than 9999 seconds. The default value of NX is 0101. To determine the actual time delay, T1 is multiplied by the first two digits of NX. The resulting value is the delay in seconds used by the timer. Likewise, the last two digits of NX are the multiplier for T2. For example, imagine T1 = 2000, T2 = 4000 and NX = 0105. Then the actual delay would be 2000 seconds (2000 x 01) for T1 and 20000 (4000 x 05) for T2. Setting NX to zero seems to mean nothing needs to be done.