microbit IR REMOTE AND RECEIVER

Questions and discussion about running MicroPython on a micro:bit board.
Target audience: MicroPython users with a micro:bit.
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asaf
Posts: 19
Joined: Sat Dec 29, 2018 4:32 pm

microbit IR REMOTE AND RECEIVER

Post by asaf » Mon May 18, 2020 3:57 am

i want to use ir on my microbit with python, like here - https://www.circuitbasics.com/arduino-i ... -tutorial/
do u have example for this ?
Thanks a lot

OutoftheBOTS_
Posts: 791
Joined: Mon Nov 20, 2017 10:18 am

Re: microbit IR REMOTE AND RECEIVER

Post by OutoftheBOTS_ » Mon May 18, 2020 6:46 am

I have used this bit if hardware https://www.ebay.com/itm/1Pc-Portable-I ... SwT2daRZgF just recently for something similar but it was for my 6yrs robot which is a Mbot (ardunio MCU programmed with scratch). It is cheap and works very well and comes with a really nice little reciver with LED that flashes when receiving a command from and IR remote. If you want to see it in action click here https://www.youtube.com/watch?v=YMagc97np-M

I have in the past wrote python code to receive and decode all these IR remotes but didn't keep the code (pity so many people have asked for it :( )

You may need to write your own code. I did write a short tutorial ages ago for doing this on RPi see https://www.youtube.com/watch?v=zDErQPXtMyU&t=53s

I also did a little googling and here also good info for doing this in python https://fishandwhistle.net/post/2016/ra ... e-control/

asaf
Posts: 19
Joined: Sat Dec 29, 2018 4:32 pm

Re: microbit IR REMOTE AND RECEIVER

Post by asaf » Mon May 18, 2020 11:02 am

thanks.
but i need it to microbit.
do u have python code for this ir to microbit ?
Thanks

OutoftheBOTS_
Posts: 791
Joined: Mon Nov 20, 2017 10:18 am

Re: microbit IR REMOTE AND RECEIVER

Post by OutoftheBOTS_ » Mon May 18, 2020 8:13 pm

I am not sure if you will find code for microbit but from the links above you can understand how it works and write your own code

asaf
Posts: 19
Joined: Sat Dec 29, 2018 4:32 pm

Re: microbit IR REMOTE AND RECEIVER

Post by asaf » Sun Aug 02, 2020 1:06 pm

i try this. but its not work.
from microbit import *
from time import time
 


def binary_aquire(pin, duration):
    # aquires data as quickly as possible
    t0 = time()
    results = []
    while (time() - t0) < duration:
        results.append(pin8.read_digital())
    return results


def on_ir_receive(pinNo, bouncetime=150):
    # when edge detect is called (which requires less CPU than constant
    # data acquisition), we acquire data as quickly as possible
    data = binary_aquire(pinNo, bouncetime/1000.0)
    if len(data) < bouncetime:
        return
    rate = len(data) / (bouncetime / 1000.0)
    pulses = []
    i_break = 0
    # detect run lengths using the acquisition rate to turn the times in to microseconds
    for i in range(1, len(data)):
        if (data != data[i-1]) or (i == len(data)-1):
            pulses.append((data[i-1], int((i-i_break)/rate*1e6)))
            i_break = i
    # decode ( < 1 ms "1" pulse is a 1, > 1 ms "1" pulse is a 1, longer than 2 ms pulse is something else)
    # does not decode channel, which may be a piece of the information after the long 1 pulse in the middle
    outbin = ""
    for val, us in pulses:
        if val != 1:
            continue
        if outbin and us > 2000:
            break
        elif us < 1000:
            outbin += "0"
        elif 1000 < us < 2000:
            outbin += "1"
    try:
        return int(outbin, 2)
    except ValueError:
        # probably an empty code
        return None




display.scroll("s")
while True:
    display.scroll("w")
    code = on_ir_receive(8)
    if code:
        display.scroll(str(hex(code)))
    else:
        display.scroll("I")

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