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+--- Thread: KC868-A16 IR Input (/showthread.php?tid=7957)
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KC868-A16 IR Input - cyberrailpete - 04-20-2025
Hello.
I have a KC868-A16 - Great board. I have a number of IR sensors that need to send back state via MQTT to different topics so have had to write custom sketch in Aurdino IDE.
Problem is the sensor never goes inactive. I have tested the IR with a meter and voltage drop on digital out when active and high when inactive.
KC868-A16 seems to be 12v on the input which is weird. Help please!
RE: KC868-A16 IR Input - admin - 04-20-2025
digital input =0v (short with GND) = TRUE
digital input =12v (not short with GND) = FALSE
RE: KC868-A16 IR Input - cyberrailpete - 04-20-2025
I've tried everything and nothing.
Using the 3V3 from the board and Ground to the IR sensor and D0 out in to input1 nothing is working.
Can I upload sketch?
RE: KC868-A16 IR Input - admin - 04-20-2025
you can download KCS v2 firmware to test. short digital input with GND. if monitor webpage show GREEN color ico, that means correct.
RE: KC868-A16 IR Input - cyberrailpete - 04-20-2025
Do you have link?
What do you mean short with ground? The IR sensor is 3v3 and shared ground?
RE: KC868-A16 IR Input - admin - 04-20-2025
make sure your IR sensor is dry contact signal output. you can use multi meter to test it.
RE: KC868-A16 IR Input - cyberrailpete - 04-20-2025
These are the sensors...
I just found this on AliExpress:
￡0.76 | 10pcs/1pc TCRT5000 IR Infrared Reflectance Sensor Obstacle Avoidance Module Tracing Sensor Tracing Module For Arduino Diy Kit
https://a.aliexpress.com/_EHYGBva
RE: KC868-A16 IR Input - cyberrailpete - 04-20-2025
This one OK?
I just found this on AliExpress:
￡0.76 | 10pcs/1pc TCRT5000 IR Infrared Reflectance Sensor Obstacle Avoidance Module Tracing Sensor Tracing Module For Arduino Diy Kit
https://a.aliexpress.com/_EHYGBva
RE: KC868-A16 IR Input - cyberrailpete - 04-20-2025
This is what I have.
TCRT5000
RE: KC868-A16 IR Input - admin - 04-20-2025
you can confirm with seller, it have different versions. usually will use this PIR sensor: https://shop.kincony.com/products/wired-pir-sensor