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Gikfun MC-38 Wired Door Sensor Magnetic Switch for Arduino EK1656

4.3 out of 5 stars 130 ratings
Currently unavailable.
We don't know when or if this item will be back in stock.
Brand Gikfun
Control Method App
Mounting Type Door Mount
Sensor Technology Contact Sensor
UPC 634894433677 728821645032

About this item

  • MC-38 Wired Door Window Sensor Magnetic Switch Home Alarm System Detector
  • Note: No external power supply, connect to wired or wireless alarm control panel GND and N.C ports directly! Please note that this item not fit to iron door, It will decline magnetic of the sensor
  • NC means Normally Closed:When the magnet together, the circuit is conductive( light on ); when the magnet separate, the circuit is not conductive ( light off ).

Product Description

Gikfun Inc focus on electronic design, development and marketing of Arduino.

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Product description:

  • MC-38 Wired Door Window Sensor Magnetic Switch Home Alarm System Detector
  • It can be connected to ESP8266 to control the garage door.
  • Note: No external power supply, connect to wired or wireless alarm control panel GND and N.C ports directly! Please note that this item not fit to iron door, It will decline magnetic of the sensor
  • Pack of 2pcs

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Customer Reviews
4.4 out of 5 stars 389
4.2 out of 5 stars 23
4.3 out of 5 stars 62
4.4 out of 5 stars 710
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Price $11.98 — no data — no data $9.49 — no data — no data

Product information

Technical Details

Manufacturer ‎Esooho
Part Number ‎EK1656
Item Weight ‎0.32 ounces
Product Dimensions ‎4.5 x 0.4 x 2.5 inches
Item model number ‎3652995690
Is Discontinued By Manufacturer ‎No
Style ‎Modern
Item Package Quantity ‎1
Batteries Included? ‎No
Batteries Required? ‎No

Additional Information

ASIN B0154PTDFI
Customer Reviews
4.3 out of 5 stars 130 ratings

4.3 out of 5 stars
Best Sellers Rank
Date First Available September 9, 2015

Warranty & Support

Amazon.com Return Policy:Amazon.com Voluntary 30-Day Return Guarantee: You can return many items you have purchased within 30 days following delivery of the item to you. Our Voluntary 30-Day Return Guarantee does not affect your legal right of withdrawal in any way. You can find out more about the exceptions and conditions here.

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Gikfun MC-38 Wired Door Sensor Magnetic Switch for Arduino EK1656

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Customer reviews

4.3 out of 5 stars
130 global ratings

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Customers say

Customers find the door sensor works great and is reliable, with one mentioning it's compatible with ESP8266. They appreciate its ease of replacement and find it simple to use.

Select to learn more

FunctionalityEase of replacementEase of use
17 customers mention "Functionality"15 positive2 negative

Customers find that the door sensor works great and is reliable, with one customer noting it functions well with ESP8266.

"...instantly, and it has sat there for a full year so far and it hasn't failed...." Read more

"Works great...." Read more

"Been using these on my garage doors. The sensors have been working great...." Read more

"I used this to trigger my automatic steps on my motorhome. It works great and is small and easy to install." Read more

3 customers mention "Ease of replacement"3 positive0 negative

Customers find the door sensor easy to replace.

"Good item" Read more

"Easy replacement..." Read more

"Good replacement..." Read more

3 customers mention "Ease of use"3 positive0 negative

Customers find the door sensor easy to work with.

"...Simple switch - easy to work with." Read more

"Simple device, holds up over time!..." Read more

"Simple...." Read more

Top reviews from the United States

  • ylwsub68
    5.0 out of 5 stars Simple device, holds up over time!
    Reviewed in the United States on January 2, 2025
    Verified Purchase
    I ran one of these switches to an ESP board to make my garage door opener smart. It reports back to the board instantly, and it has sat there for a full year so far and it hasn't failed. Thank goodness this pack came with two, I accidentally fried one of them running the wiring through the wrong transformer.
    Helpful
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  • Northeast Bob
    5.0 out of 5 stars Works great
    Reviewed in the United States on January 23, 2023
    Verified Purchase
    I am using this for a garage door sensor project with an ESP2866 wifi board so I can see when the door is open/closed via a website. Simple switch - easy to work with.
    One person found this helpful
    Helpful
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  • Larry kessinger
    4.0 out of 5 stars Availability
    Reviewed in the United States on March 23, 2020
    Verified Purchase
    Like
    Helpful
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  • Latex Lady
    5.0 out of 5 stars Easy replacement
    Reviewed in the United States on April 13, 2025
    Verified Purchase
    They do the job, replaced some old ones
    Helpful
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  • Ted
    5.0 out of 5 stars Simple.
    Reviewed in the United States on November 6, 2020
    Verified Purchase
    The media could not be loaded.
    Works great. Normally open, when the two pieces get within about 3/4" of each other the resistance starts at about 50 ohms and drops to nearly zero when they are touching.
    One person found this helpful
    Helpful
     Report
  • Chase Thompson-Baugh
    5.0 out of 5 stars Great product
    Reviewed in the United States on November 7, 2019
    Verified Purchase
    Been using these on my garage doors. The sensors have been working great. The adhesive is strong too so I don't worry about them falling off due to vibrations from opening/closing the garage doors.
    Helpful
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  • fuzzy1
    1.0 out of 5 stars Reliability
    Reviewed in the United States on January 24, 2019
    Verified Purchase
    Failed after 2 weeks. Live in illinois. Weather shouldn’t be a factor. Installed second switch. I don’t have faith in it though.
    Helpful
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  • jrmjr
    5.0 out of 5 stars Good replacement
    Reviewed in the United States on January 13, 2024
    Verified Purchase
    Works to replace a non-working magnetic switch at a reasonable cost.
    Helpful
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Top reviews from other countries

  • Ngoc Trung Nguyen
    4.0 out of 5 stars Good product!
    Reviewed in Germany on September 12, 2020
    Verified Purchase
    Given the price and quantity, the product functions as expected
    Report
  • Dizzy building
    5.0 out of 5 stars Works as expected, really responsive
    Reviewed in Canada on October 27, 2021
    Verified Purchase
    I ordered these to use with my alarm system and they are working great. Great value for price and quick delivery.
    Report
  • Amazon Customer
    4.0 out of 5 stars Works great with Shelly 1 wifi relay for garage door
    Reviewed in Canada on January 10, 2022
    Verified Purchase
    Installed on my garage door as part of a project to create a DIY wifi garage opener with Shelly 1 wifi relay. This reed switch is normally-open (NO) configuration and so far works great to tell me if the door is open or closed.
    Report
  • Amazon customer
    1.0 out of 5 stars Junk
    Reviewed in Canada on November 16, 2023
    Verified Purchase
    Contacts stick closed, have to tap them to get it to open again . Neither unit is reliable
    Report
  • Amazon Customer
    4.0 out of 5 stars works as advertized
    Reviewed in Canada on October 21, 2021
    Verified Purchase
    I have bread boarded the circuit i want to build and it works. just have to put into practice.
    Report