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LC Technology 5V 4 Channel Relay Board (LC-ESP01-4R-5V)
GLOBAL
LC Technology 5V 4 Channel

Available from:
Aliexpress.com
Amazon.com




Manufacturer:
Chinalctech.com


GPIO #Component
GPIO00 Led1
GPIO01 User
GPIO02 Button1
GPIO03 User
GPIO04 None
GPIO05 None
GPIO09 None
GPIO10 None
GPIO12 Relay1
GPIO13 Relay2
GPIO14 Relay3
GPIO15 Relay4
GPIO16 None
FLAG None
Configuration (old format, will be converted to new template when applied)
Edit on GitHub
{"NAME":"LC-Tech_4CH ","GPIO":[52,255,17,255,0,0,0,0,21,22,23,24,0],"FLAG":0,"BASE":18}
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Flashing

Remove ESP01 from the relay PCB and connect it to your USB-to-serial adapter according to the image and flash Tasmota on it. Flashing

You need to configure these rules to control the relays. The ones defined in the template are just virtual relays!

Rule1 
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
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Make sure to enable the rule:

Rule1 1
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If relays still don’t switch try BaudRate 9600