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https://www.electrodragon.com/product/wifi-iot-relay-board-based-esp8266/
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used devices OPM1110-dat - relay-dat
Note:
- Please connect the board to sensor by wires, because the PCB and relays will generate heats!! 1-2 degree higher!!
- The board has exposed high voltage AC connection, be very carefully on this.
- Please notice the two relay output terminals are a little conflict with case, second channels need to use soft wires or remove the screw installation bars manually.
Inductive Load
For inductive load (motor-type) alternative:
This is a generate relay board, which may cause restarting when use it drive the inductive loads, please use the following alternative.
- Added kickback EMC board near your load, this can solve the problem, but more extra wiring.
- Use relay board version IL, which is specially for this, tested by us and some other customers.
- Use relay board version SPDT, which the AC main power not passed through the input of the board to output, no interferance.
Read more about inductive laod here inductive-load-dat