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LC Technology AC90V-250V 1 Channel Relay Board (ESP32_Relay X1)
LC Technology AC90V-250V 1 Channel

Available from:
Aliexpress.com
Banggood.com




Manufacturer:
Chinalctech.com


GPIO #Component
GPIO00 User
GPIO01 User
GPIO02 User
GPIO03 User
GPIO04 User
GPIO05 User
GPIO09 User
GPIO10 User
GPIO12 User
GPIO13 User
GPIO14 User
GPIO15 User
GPIO16 Relay 1
GPIO17 User
GPIO18 User
GPIO19 User
GPIO20 None
GPIO21 User
GPIO22 User
GPIO23 LedLink
GPIO24 None
GPIO25 User
GPIO26 User
GPIO27 User
GPIO6 None
GPIO7 None
GPIO8 None
GPIO11 None
GPIO32 User
GPIO33 User
GPIO34 User
GPIO35 User
GPIO36 User
GPIO37 None
GPIO38 None
GPIO39 User
Configuration for ESP32
{"NAME":"ESP32_Relay_AC_X1","GPIO":[1,1,1,1,1,1,1,1,1,1,1,1,224,1,1,1,0,1,1,544,0,1,1,1,0,0,0,0,1,1,1,1,1,0,0,1],"FLAG":0,"BASE":1}

This dev board can be powered only by AC 90V-250V. Do not flash while powered this way.

Flash with tasmota32-nspanel.bin, otherwise the relay on the board clicks on reboot because it’s using a pin reserved for PSRAM.

Flashing

WARNING: DO NOT IN ANY CIRCUMSTANCE OPERATE THE DEVICE WHILE CONNECTED TO AC POWER

Flash using any of the provided TX/RX headers and GND. Supply 5V power from a stable source. Use the IO button to enter flash mode.
I’ve flashed it by powering it via 3.3V pin using the “Golden CH340G” adapter.