@Lazar-Demin Hi thanks for responding I tried 2 days ago send the data following the steeps in the link, but he doesn't use the CA certificate. At momment that I clic in the option "download" the CA certificate in this link https://docs.aws.amazon.com/iot/latest/developerguide/create-device-certificate.html. Sends to this page. https://docs.aws.amazon.com/iot/latest/developerguide/server-authentication.html#server-authentication-certs

In this page. I use the Amazon Root A1, but I don't know if it's correct to use.

@crispyoz Which others changes I need to do?
Thanks for responding

Could you explain me, what de you tried to say in this " I would also implement the on_publish callback.

¿This? Sorry if my question it's basic- I´m new using this module and sendding data to AWS.
def on_publish(client, userdata, mid):
print("Message published: " + message)

# message published, disconnect
client.disconnect()

client.on_publish = on_publish"

I was wondering if it's posible run a code(python code) automatically on boot the Omega Module. In other words, that when I power on my Omega module, this runs a program as default realized in python, the file is in directory named root .

I want to send date that I recived from a Oxygen sensor(SDS011) using serial port. I want to send this values to the Amazon server using MQTT. My main code is the next:

print("Importing Library")
import time
import sys  
import datetime
import paho.mqtt.client as paho
import ssl
import os
import json
print("Importing Done")

def on_connect(client, userdata, flags, rc):
global connflag
connflag = True
if rc == 0:
	print("Connected")
else:
print("Connection returned result: " + str(rc) )

def on_message(client, userdata, msg):
print(msg.topic+" "+str(msg.payload))

mqttc = paho.Client("Omega-C11B")
mqttc.on_connect = on_connect
mqttc.on_message = on_message
print("Paho Client Setup Done")

awshost = "a3rzs5flqm8tjk-ats.iot.ap-south-1.amazonaws.com"
awsport = 8883
clientId = "Omega-C11B"
thingName = "Omega-C11B"
caPath = "/root/root-CA.crt"
certPath = "/root/496d95a10e-certificate.pem.crt"
keyPath = "/root/496d95a10e-private.pem.key"

mqttc.tls_set(caPath, certfile=certPath, keyfile=keyPath, cert_reqs=ssl.CERT_REQUIRED, 
tls_version=ssl.PROTOCOL_TLSv1_2, ciphers=None)
print("TLS Established")
mqttc.connect(awshost, awsport, keepalive=60)
print("Server Connected")
mqttc.loop_start()

while True:
humidity = 60 #Supposing Data
temperature = 30  #Supposing Data
t = time.time();
date = datetime.datetime.fromtimestamp(t).strftime('%Y%m%d%H%M%S')
mqttc.publish("$aws/things/Omega-CF2D/shadow/update/", json.dumps({"time": date, 
    "temperature": temperature, "humidity": humidity}), qos=1)
time.sleep(10)

In my console I get that the connection was sucefull, but when I see the AWS server, I can´t find the data. I don't know if it's due to a code problem or caPath Certificate, beacuse I don't know where I can find. So I get it forn this link link text. In my console I get :

I'm sending data with a time to 10seconds.

@Suman-kumar-Jha Hi sorry I'm having some problems like you, I was wondering what it's the file named caPath = "/root/root-CA.crt" o where is in. into the page AWS. I would really appreciate if you can help me with the doubt.

Hi, I was trying to communicate with a sensor using I2C, so I need to install the libraries of I2C for Omega. In other words pyOnionI2C, but when I search the files on the directory, this files are in blank. Someone could help me, sending the files with names :
init.py
onionI2C.so
.

I tried to remove the package(pyOnionI2C) and install the again, but the error continues. I think that it's is the reason of I get error during the writting of bytes.

Other question that I need solve, is this:

It's okay that I've only a file named i2c_xx in the folder dev?. This implys problems? Should not have more files? That it's to say:
i2c_0
i2c_1
i2c_2
......
i2c_122
etc.

Thank you for responding, the real direction is 0x70 using 7 bits.
In other words is 111-0000.
If I include the bit of R/W, this will be 0 if i want to write a data in the slave(sensor).
.111000-R/W ----------> 11100000
11100000 Is E0 in hex. For this reason, I have several concerns about this module, but I hope to solve it later. Thans again for taking my doubt. I will try to send you 6 bits as data and include the CRC byte. It is likely that when I insert the writeBytes command, the R/W bit is inclued internally without me noticing.

@György-Farkas Thank you for responding, If I wish to send the 0x0c command to get the data that I need, and knowing that the data frame must be sent as shown in the image. I'm trying to send differents ways to get the data from sensor.

from OmegaExpansion import onionI2C
i2c=onionI2C.OnionI2C(0)

I think that the next options could serve
Option1
Device=0x70
Command=0x0C
VectorBytes=[0x00, 0x00, 0x00, 0x00, 0xF3] #0xF3 is the CRC calculated
status = i2c.writeBytes(Device,Command, VectorBytes)
Option2
Device=0xE0
Command=0x0C
VectorBytes=[0x00, 0x00, 0x00, 0x00, 0xF3] #0xF3 is the CRC calculated
status = i2c.writeBytes(Device,Command, VectorBytes)
Option3
Device=0xE0
VectorBytes=[0x0C,0x00, 0x00, 0x00, 0x00, 0xF3] #0xF3 is the CRC calculated
status = i2c.write(Device, VectorBytes)
Option4
Device=0x70
VectorBytes=[0x0C,0x00, 0x00, 0x00, 0x00, 0xF3] #0xF3 is the CRC calculated
status = i2c.write(Device, VectorBytes)
Option5
Device=0x70
AddressData=???
size=7
Data= i2c.readBytes(Device, AddressData, size)

Note:
I just tried with the option 1 and option4. The problem with the option 2()(I think that it's the correct) and option3, is that the device address is 0x70, but when i put the parameter "Device" that really is 0x70(0b1110000) but due to that the write bit is 0 , the "new address" change to E0(0b1110000). I get a error because the 0xE0 it's not a know address(don't exist).
I don't know if I'm clear with the problem :c. I would appreciate if you could clear my doubts or helm me with an alternativeto solve my problem.

I'm new using this module and I don't know if it's required to sed a previous byte command (0X0C) tp clarify that I want that the sensor to send me the disired data(I need the bytes 1, 2 and 7)
I want to know the value of the parameters that sends the micS-VZ-89TE Oxygen sensor.

What should be the value taht should be placed in the parameters named "bytes" and "direction":
bytes = [???]
status = i2c.writeBytes(0x70, direction, bytes)
buffer=(i2c.readBytes(0x70,direction,7))

If I execute the command i2cget -y 0 0x70 ??, i get the error IOError: I2C transaction failed. I am using the sensor mic VZ89TE