Client fails to initialise the RF shield for target NUCLEO_F401RE (based in mbed 5.2)

[armmbed]

Client fails to initialise the RF shield for target NUCLEO_F401RE (based in mbed 5.2)

[karsev]

@maansaari

[ciarmcom]

ARM Internal Ref: IOTCLT-1246

[yogpan01]

@SeppoTakalo Can you please look into this ?

[TuomoHautamaki]

@sg- , please investigate

[sg-]

Not supported in https://github.com/ARMmbed/mbed-os-example-client#supported-target-hardware-configurations

Known issue. https://github.com/ARMmbed/oob-mbed-os-example-client/issues/15

[javier-moreno-tridonic-com]

After reading the pointers and causes commented in ARMmbed/oob-mbed-os-example-client#15 managed to run it by making the following changes to the example:

---

In simpleclient.h Replace:

M2MSecurity* create_register_object() {
        // create security object using the interface factory.
        // this will generate a security ObjectID and ObjectInstance
        M2MSecurity *security = M2MInterfaceFactory::create_security(M2MSecurity::M2MServer);

        // make sure security ObjectID/ObjectInstance was created successfully
        if(security) {
            // Add ResourceID's and values to the security ObjectID/ObjectInstance
            security->set_resource_value(M2MSecurity::M2MServerUri, _server_address);          
            security->set_resource_value(M2MSecurity::SecurityMode, M2MSecurity::Certificate);
            security->set_resource_value(M2MSecurity::ServerPublicKey, SERVER_CERT, sizeof(SERVER_CERT));
            security->set_resource_value(M2MSecurity::PublicKey, CERT, sizeof(CERT));
            security->set_resource_value(M2MSecurity::Secretkey, KEY, sizeof(KEY));            
        }
        return security;
    }

With

M2MSecurity* create_register_object() {
        // create security object using the interface factory.
        // this will generate a security ObjectID and ObjectInstance
        M2MSecurity *security = M2MInterfaceFactory::create_security(M2MSecurity::M2MServer);

        // make sure security ObjectID/ObjectInstance was created successfully
        if(security) {
            // Add ResourceID's and values to the security ObjectID/ObjectInstance
            security->set_resource_value(M2MSecurity::M2MServerUri, _server_address);
            security->set_resource_value(M2MSecurity::SecurityMode, M2MSecurity::NoSecurity);         
        }
        return security;
    }

---

In mbed_app.json

"MBEDTLS_NO_DEFAULT_ENTROPY_SOURCES" and "MBEDTLS_TEST_NULL_ENTROPY" need to be added to macros

---

In mbed-os\targets\TARGET_STM\TARGET_STM32F4\TARGET_NUCLEO_F401RE\PinNames.h

Since PA_5 is used by the SPI clock LEDs need to be "rewired" to an unused pin (e.g. PA_9)

    LED1        = PA_9,
    LED2        = PA_9,
    LED3        = PA_9,
    LED4        = PA_9,

Keep in mind that we register our devices on a Leshan LWM2M server with disabled security for testing purposes. This solution probably won't be useful if the deviced is intended to be used in conjunction with mbed Device Connector