NEC-Decoder

Designed and tested on Raspberry PI Zero Version 0.1 Python 3 required

The idea of this module is to retrieve, translate and fill in missing InfraRed signal for Raspberry PI

IR Signal recorded by a sound card using Line-in looks like this one:

• 9 miliseconds of positive signal
• 4.5 miliseconds of negative
• 27 miliseconds 8-bit Address and 8-bit of inversed address
• 27 miliseconds 8-bit Command and 8-bit inversed command

Example from the recording:

• Address: 00000000 11111111
• Command: 10100010 01011101

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Requirements

Before using with Raspberry Zero make sure your Raspberry PI has

• appropriate power adapter
• good cooling
• use Python 3

Additionally, follow IR Receiver documentation to use appropriate resistors to eliminate unnecessary noises

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NEC Decoder Example

# Only for value of GPIO.BCM
import RPi.GPIO as GPIO 
from time import sleep 

import NEC
import SignalDecoder
import GPIODataProvider

GPIO_Mode = GPIO.BCM
GPIO_PIN = 16


IReader = SignalDecoder.SignalDecoder(
    GPIODataProvider.EdgeDetected(
        GPIO_Mode,
        GPIO_PIN
    ),
    NEC.NECDecoder()
    )

while True:
    sleep(0.1)

    if IReader.hasDetected():
        cmd = IReader.getCommand()
        print(cmd)

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DHT22 Signal Decoder: Humidity and temperature

Designed and tested on Raspberry PI 3A+ Version 0.1 Python 3 required

Recorded DHT22 signal (using sound card line-in)

Chart created from the data collected by the DHT22 class. Two DHT22 devices have been connected to single raspberryPI 3A+. One measures temperature and humidity inside, another one outside.

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Requirements

• Raspberry 3 or better
• use Python 3

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DHT22 Sensor Example

from time import sleep 

import TemperatureSensor

GPIO_PIN = 12

# DHT22 connected to PIN 12 of Raspberry (BCM), class refresh every 2 seconds
Sensor = TemperatureSensor.TemperatureSensor(GPIO_PIN, 2)

while True:
    print("Temperature = {temperature}°C, Humidity = {humidity}%".format(temperature=Sensor.Temperature, humidity=Sensor.Humidity))
    sleep(2)