Video tools online

Background remover

[1] https://www.cutout.pro/remove-video-background #5s

Video splitter

[1] https://echowave.io/app/tools/split/ #many parts

 

stepik code revisor stage

#Learn more: https://stepik.org/lesson/9173

stepik (background revisor code)

import random

def generate():  #create test cases
    num_tests = 50
    tests = []
    tests.append("5\n")
    tests.append("11\n")
    tests.append("18\n")
    for test in range(num_tests):
        test_case = "%d\n" % (test)
        tests.append(test_case)
    tests.append("200\n")    
    return tests

def solve(dataset):  #real solution
    n = int(dataset.strip())

    if (n == 0):
        f = 0;
    elif (n == 1):
        f = 1;
    else:
        fm1 = 0
        fm2 = 1
        for i in range(n):
            f = fm1 + fm2
            fm2 = fm1
            fm1 = f

    
    return str(f)


def check(reply, clue):  #validator
    return int(reply) == int(clue)

Camera on LAN - Get urls

 

python code snippet  to get url for use with vlc and show the camera on LAN

 

#connection code , previously done in this blog

media = camera.create_media_service()

profiles = media.GetProfiles()

for p in profiles:
    print("Profile:", p.Name)
    print("Token:", p.token)

    uri = media.GetStreamUri({
        'StreamSetup': {
            'Stream': 'RTP-Unicast',
            'Transport': {
                'Protocol': 'RTSP'
            }
        },
        'ProfileToken': p.token
    })

    print("RTSP:", uri.Uri)
    print() 

#

vlc 'rtsp://admin:your_key@192.168.1.8:554/Streaming/Channels/101?transportmode=unicast&profile=Profile_1'

Camera on LAN - Check on LAN

 

python code to test camera ONVIF(EZVIZ) on LAN, if you do not know the ip, use nmap to scan.

 from onvif import ONVIFCamera

camera = ONVIFCamera(
    '192.168.1.8',
    80,
    'admin',
    'your_key',  #get from QR or app
    no_cache=True
)

print("Connected to ONVIF")

info = camera.devicemgmt.GetDeviceInformation()

print("Manufacturer:", info.Manufacturer)
print("Model:", info.Model)
print("Firmware:", info.FirmwareVersion)
print("Serial:", info.SerialNumber)
print("Hardware ID:", info.HardwareId)

Arduino modules: Wifi esp8266

 

[1] code and scheme https://github.com/imjeffparedes/iot-esp8266-arduino-interface/tree/master

Circuit simulation online tools

 

[1] https://app.tinkered.ai

 

Slides animation online

 

 

 

[1] Slides +Animation https://slidespeak.co/free-tools/animate-slides-with-ai 

[2] Slides to mp4 https://slidespeak.co/free-tools/convert-powerpoint-to-video-ai

[3] https://app.synthesia.io (To get text to speak/chrome) 

[4] Animation introductions https://www.flexclip.com (To get intro)

Online text to speeach tools

 

[1] Free 500 letters. https://fish.audio/app/text-to-speech/   #e-mail

Arduino Sensors - Gas

 

 

References:

[1] gas sensors MQx https://naylampmechatronics.com/blog/42_tutorial-sensores-de-gas-mq2-mq3-mq7-y-mq135.html

[2] gas sensor MQ135 https://www.tecneu.com/blogs/tutoriales-de-electronica/mq135

[3] gas sensor MQ137 (Ammonia) https://circuitdigest.com/microcontroller-projects/arduino-mq137-ammonia-sensor 

Resources(wifi):

[1] https://mecatronica.saisac.pe/producto/modulo-esp-01-esp8266-wifi/

[2] https://www.electromania.pe/?s=ESP8266&post_type=product

[3] https://www.teslaelectronic.com.pe/producto/modulo-esp8266-serial-wifi/?srsltid=AfmBOoq-9awBhXa6sHpJDswF0XyhD_mICthqr3IEZgQzeOaCFI0GygXP

Setup Arduino IDE

 

avrdude: ser_open(): can't open device "/dev/ttyACM0": Permission denied

$ ls -l /dev/ttyACM* 

crw-rw-r-- 1 root dialout ... /dev/ttyACM0

Fix:

sudo chmod a+rw /dev/ttyACM0 

Resources:

[1] https://www.arduino.cc/en/software/

[2] Simulator https://www.tinkercad.com/