SSL Connection to AWS IoT from ESP8266(Micropython)



  • Re: Q: ussl usage for https - problem

    Hello @daniel,

    I have checked following project regarding to make SSL connection to AWS_IOT https://github.com/juwul/umqtt_aws_iot

    Unfortunately, I am also receiving following error ::
    |Error in mqtt connect: [Exception] TypeError: extra keyword arguments given.|

    Problem is caused by ussl.wrap_socket(...) function in ussl;

        addr = socket.getaddrinfo(self.server, self.port)[0][-1]
        self.sock.connect(addr)
    
        if self.ssl:
            import ussl
            self.sock = ussl.wrap_socket(self.sock, **self.ssl_params)
        
        /*i have also moved lines here and tried but it did not help*/
        //addr = socket.getaddrinfo(self.server, self.port)[0][-1]
        //self.sock.connect(addr)
    

    My settings in main.py as follows.

    MQTT_CLIENT_ID = "23876283476233"
    MQTT_HOST = "yourSpecificEndPointHere.iot.eu-west-1.amazonaws.com"
    MQTT_PORT = 8883
    
    client = MQTTClient(client_id=MQTT_CLIENT_ID, server=MQTT_HOST, port=MQTT_PORT, keepalive=10000, ssl=True, ssl_params={"certfile":"/flash/cert/deviceCertAndCACert.pem", "keyfile":"/flash/cert/deviceCert.key", "ca_certs":"/flash/cert/root.pem"})
    

    (With these 2 certs and key, i am successfully connecting to AWS IoT from MQTT.fx)

    if it is possible to make secure SSL connection to AWS IoT from micropython on ESP8266, I will be glad if you can let me know your guidance regarding to this issue.



  • @sunrise17
    you must modify esp_get_revision - i do not have guide but on the forum you can find such posted by
    @robert-hh
    https://forum.pycom.io/post/13828



  • Dear @livius , is there some guide to upload custom pycom firmware to ESP-WRoom-32 board? Because you have mentioned that it is necessary to adjust chip revision. I will be glad if you let me know about some guide to flash my board with pycom firmware. Thanks...



  • @sunrise17

    sysname='esp32', nodename='esp32',

    then you are on the wrong forum, for this device better go to micropython forum

    is it possible to update it with pycom firmware

    it is possible to flash it with custom pycom firmware
    i say custom because you must modify firmware first, especially about chip revision.



  • @livius, i am using oem esp32, is it possible to update it with pycom firmware update?0_1518180601323_IMG_7127.JPG,

    I have tried but it has not been updated



  • @sunrise17
    You must update the firmware first.
    https://pycom.io/downloads/

    You have 1.9 but current is 1.15 and frozen mqt go with 1.10



  • @livius

    OS Info as follows;
    (sysname='esp32', nodename='esp32', release='1.9.3', version='v1.9.3-286-gbbb08431 on 2018-02-09', machine='ESP32 module with ESP32')



  • @sunrise17 said in SSL Connection to AWS IoT from ESP8266(Micropython):

    Esp32

    it come with pycom firmware
    what firmware version do you have?

    import os
    os.uname()
    


  • @livius Yes i have tried it also but after i got this error i have left it. "ImportError: no module named 'MQTTClient''. Because mqtt lib is not coming with Esp32 Firmware in default.



  • @sunrise17
    I do not know and becouse of that try first internal one.
    Remove all mqt files from your flash and do simple

    from MQTTClient import MQTTClient
    

    and use it then



  • Dear @livius i have downloaded simple.py from following link below and added file into my board.
    https://github.com/micropython/micropython-lib/tree/master/umqtt.simple/umqtt
    I have imported library as follows;

    from simple import MQTTClient
    

    Error as follows;

    (2378) wifi: connected with ASUS_5G_2.4G_EXT, channel 4
    (2378) network: event 4
    (3268) event: sta ip: 192.168.1.169, mask: 255.255.255.0, gw: 192.168.1.1
    (3268) network: GOT_IP
    (5098) wifi: pm start, type:0
    
    Error in mqtt connect: [Exception] TypeError: extra keyword arguments given
    Mqtt Broker connected
    Error in mqtt connect: [Exception] TypeError: extra keyword arguments given
    Mqtt Broker connected
    Error in mqtt connect: [Exception] TypeError: extra keyword arguments given
    Mqtt Broker connected
    Error in mqtt connect: [Exception] TypeError: extra keyword arguments given
    Mqtt Broker connected
    Error in mqtt connect: [Exception] TypeError: extra keyword arguments given
    Mqtt Broker connected
    Error in mqtt connect: [Exception] TypeError: extra keyword arguments given
    Mqtt Broker connected
    Error in mqtt connect: [Exception] TypeError: extra keyword arguments given
    Mqtt Broker connected
    Error in mqtt connect: [Exception] TypeError: extra keyword arguments given
    Mqtt Broker connected
    Error in mqtt connect: [Exception] OSError: 23
    Mqtt Broker connected
    Error in mqtt connect: [Exception] OSError: 23
    Mqtt Broker connected
    

    Do you have any idea about this error, why it could be happened?



  • @sunrise17
    It looks really different
    try to remove all MQT files from card and use internal one.

    internal files are already on your device as frozen modules.



  • @livius Thanks for your quick response, you can find complete code of mqtt.py where i get the MQTTClient.py.0_1518175187007_mqtt.py



  • @sunrise17
    I do not suppose that this is releated because you get error on wrap_socket
    but from where do you get MQTTClient.py?
    I ask because it is now in frozen modules - try removing MQT releated files from flash and try again



  • @livius Today, i have received ESP32 but still i am getting same error as "Error in mqtt connect: [Exception] TypeError: extra keyword arguments given". print(self.ssl_params) in mqtt.py is printing as i expected. I have not understood the issue??

    Code in main.py;

    KEY_PATH = "/flash/cert/deviceCert.key"
    CERT_PATH = "/flash/cert/deviceCertAndCACert.pem"
    CACERT_PATH = "/flash/cert/root.pem"
    MQTT_HOST = "yourSpecificEndPointHere.iot.eu-west-1.amazonaws.com"
    MQTT_CLIENT_ID = "23876283476233" 
    
    client = MQTTClient(client_id=MQTT_CLIENT_ID, server=MQTT_HOST, port=MQTT_PORT, keepalive=10000, ssl=True, ssl_params={"keyfile":KEY_PATH, "certfile":CERT_PATH, "ca_certs":CACERT_PATH})
    

    Code in mqtt.py;

    def connect(self, clean_session=True):
        self.sock = socket.socket()
        addr = socket.getaddrinfo(self.server, self.port)[0][-1]
        self.sock.connect(addr)
        # print(self.ssl_params) // it prints: {'keyfile': '/flash/cert/deviceCert.key', 'certfile': '/flash/cert/deviceCertAndCACert.pem', 'ca_certs': '/flash/cert/root.pem'}
        if self.ssl:
            import ussl
            self.sock = ussl.wrap_socket(self.sock, **self.ssl_params)
    
        premsg = bytearray(b"\x10\0\0\0\0\0")
        msg = bytearray(b"\x04MQTT\x04\x02\0\0")
        ...


  • Dear @livius, i have some switches based on ESP8266 in my hand, that's why i wanted to apply on them. As i see that some guys could handle it, that's why i wanted to try. If MicroPython (ESP8266) library consists ussl, it should work without an issue.

    Only this warning made me anxious in according to Ussl module.

    https://docs.micropython.org/en/latest/esp8266/library/ussl.html
    "Some implementations of ussl module do NOT validate server certificates, which makes an SSL connection established prone to man-in-the-middle attacks."



  • Hi @seb, i have added print(self.ssl_params) and you can see following debug; I did not stop running program in that point, it continued and go on giving same error.

    {'keyfile': '/flash/cert/deviceCert.key', 'certfile': '/flash/cert/deviceCertAndCACert.pem', 'ca_certs': '/flash/cert/root.pem'}

    Error in mqtt connect: [Exception] TypeError: extra keyword arguments given



  • @sunrise17
    why are you talking about ESP8266 not ESP32?



  • Could you show us the contents of self.ssl_params by adding print(self.ssl_params) on the line before the call to wrap_socket. That error message implies that there are extra fields that don't match the function as documented here:
    https://docs.pycom.io/chapter/firmwareapi/micropython/ussl.html



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