https://tasmota.github.io/docs/devices/LC‑Technology‑WiFi‑Relay/#lc‑technology‑wifi‑relay‑quad‑relay‑note‑older‑versions‑of‑this‑board‑used‑a‑baud‑rate‑of‑9600‑so‑if‑115200‑doesnt‑work‑try‑9600 
(note, older versions of this board used a baud rate of 9600, so if 115200 doesn't work, try 9600)~
Note: The template provided below did not work on an ESP‑01 running Tasmota 8.1.0. It was necessary to manually enter the template in the Configure Template menu.
In configuration open Configure Other paste this template and select activate
{"NAME":"LC Technology 4CH Relay","GPIO":[52,255,17,255,255,255,255,255,21,22,23,24,255],"FLAG":0,"BASE":18}

Open Configure Module and set GPIO0, GPIO2, GPIO4 and GPIO5 as Relay1, Relay2, Relay3 and Relay4. Click Save.
 Disable SerialLog (type seriallog 0 in the Tasmota console)
Enter this command in console (configure the 1st rule)
Rule1
 on System#Boot do Backlog Baudrate 9600; SerialSend5 0 endon
 on Power1#State=1 do SerialSend5 A00101A2 endon
 on Power1#State=0 do SerialSend5 A00100A1 endon
 on Power2#State=1 do SerialSend5 A00201A3 endon
 on Power2#State=0 do SerialSend5 A00200A2 endon
 on Power3#State=1 do SerialSend5 A00301A4 endon
 on Power3#State=0 do SerialSend5 A00300A3 endon
 on Power4#State=1 do SerialSend5 A00401A5 endon
 on Power4#State=0 do SerialSend5 A00400A4 endon

Enable the rule (type rule1 1 in the Tasmota console)