I want to use an I/O port of the STM32F1 chip to connect an infrared sensor at a distance of 3 meters. I am worried that the transmission distance is too long. How can I achieve this?

孤独不可怕

I want to use an I/O port of the STM32F1 chip to connect an infrared sensor at a distance of 3 meters. I am worried that the transmission distance is too long. How can I achieve this? [Copy link]

 

I want to use an I/O port of the STM32F1 chip to connect an infrared sensor with a distance of 3 meters. I am worried that the transmission distance is too long. How can I achieve this function? Thank you!

孤独不可怕

The distance is 3 meters, but I am worried that the I/O drive capability is not enough. How can I achieve this? Thank you

baopodao

For long distances, the main consideration is the impact of interference and surge on the microcontroller, so optical coupling can be used.

孤独不可怕

Hello! How to use optocoupler? How to connect the line?

lugl4313820

It can be achieved using Bluetooth, WIFI, etc.!

孤独不可怕

baopodao published on 2021-11-17 11:27 For long distances, the main consideration is the impact of interference and surges on the microcontroller, and optical couplers can be used.

Is this the way to connect?

孤独不可怕

lugl4313820 posted on 2021-11-17 12:58 It can be achieved with Bluetooth, WIFI, etc.

That would be a bit complicated and the cost would go up.

zhangdaoyu

I have never encountered such a demand

孤独不可怕

zhangdaoyu posted on 2021-11-17 13:35 I have never encountered such a demand

oh

hh1818178

For long distances, the main consideration is the impact of interference and surge on the microcontroller, so optical coupling can be used.

huo_hu

You need to be more specific, why do you need a 3-meter cable, what kind of sensor, and what kind of signal does it transmit?

maychang

3 meters away, as long as the transmission frequency is not too high, there should be no problem. If you are worried about the I/O port driving ability is not enough, you can add a gate circuit chip as a buffer. Isn't this the case with common 232 or 485 communication?