LC Technology 5V 2 Channel Relay
Remove ESP01 from the relay PCB and connect it to your USB-to-serial adapter according to the image and flash Tasmota on it.
The red LED (D5) on the relay board should be on otherwise the module will not receive commands and relays will not switch.
If the blue LED (D5)is on instead of the red one, power off the module then hold down S1 button and power it back on. You need to configure these rules to control the relays. The ones defined in the template are just virtual relays!
Rule1 on System#Boot do 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
Make sure to enable the rule:
If relays still don’t switch try