IR Module ESP8266

1

I have a strange behaviour when I contact my IR Receiver to my ESP8266 (Nodemcu).

The board is no flashable when the IR Receiver is connected. When I tried flashing it, my mac crashed twice (when I pulled out the USB cable, but not everytime, weird!) and I can flash it without it, but when I reconnect it afterwards the serial monitor prints random characters.

I tried the VS838 IR receiver and I connected it like shown here:

OUT to D4
GND to GND
VCC to VCC

So the pinout looks a different like shown here:

So whats the problem here? Do I need a different IR Receiver.

2

Another questions: do you use 850nm or 940nm for the emitter diodes?

3

What could be my issue?

4

Just a guess but pin D4 on the Nodemcu is also the serial TX pin so data is probably not getting through.

Also 940nm is the best to use.

5

Ok thanks, so which pin should I chose instead?

Could you also explain why 940nm Leds are better? Would it work with 850nm too?

6

Found the issue.

I used the Vin pin to power the Emitter, which is fien for board where you don’t have a VU pin.

If you have that VU pin you have to use this post for 5V.

Still interessted about this