mqtt_simple connect to AWS

[Timothy]

I have an AWS account and I am comfortable with the AWS IOT operation in general. I have used it in the past. I am trying to get the sample mqtt_simple to connect to AWS IOT and be able to send packets and receive packets to the nRF9160dk board.

 I am not sure how to set up mqtt_simple parameters? I have created a thing and certificates. I have named the thing "nrf-IMEI" as recommended so it has the board ID in it. All I want to do is to be able to publish a packet to a topic on my AWS account and receive a packet from a topic in my AWS account. I have done this several times in the past with other systems so I am comfortable with AWS IOT operations and formats. I just do not understand how to get mqtt_simple to publish from my board to AWS and subscribe to messages from AWS.

Is this the correct program to use. It seems like all the pieces are there I just do not know how to use them.

I appreciate any help you can give, This is an essential requirement of our production system. right now we are using the pre-production system with a modified version of asset_tracker to send sensor data to the nRF Connect site. We need to be able to send sensor data to our AWS site.

[Timothy]

client_init was changed to the following and CONFIG_MQTT_LIB_TLS was set to y in prj.conf. I also added the following at the top of the code

#if defined(CONFIG_MQTT_LIB_TLS)
static sec_tag_t sec_tag_list[] = { CONFIG_CLOUD_CERT_SEC_TAG };
#define CONFIG_PEER_VERIFY 0
#endif /* defined(CONFIG_MQTT_LIB_TLS) */

/**@brief Initialize the MQTT client structure
*/
static void client_init(struct mqtt_client *client)
{
mqtt_client_init(client);

broker_init();

/* MQTT client configuration */
client->broker = &broker;
client->evt_cb = mqtt_evt_handler;
client->client_id.utf8 = (u8_t *)CONFIG_MQTT_CLIENT_ID;
client->client_id.size = strlen(CONFIG_MQTT_CLIENT_ID);
client->password = NULL;
client->user_name = NULL;
client->protocol_version = MQTT_VERSION_3_1_1;

/* MQTT buffers configuration */
client->rx_buf = rx_buffer;
client->rx_buf_size = sizeof(rx_buffer);
client->tx_buf = tx_buffer;
client->tx_buf_size = sizeof(tx_buffer);

#if defined(CONFIG_MQTT_LIB_TLS)
struct mqtt_sec_config *tls_config = &client->transport.tls.config;

client->transport.type = MQTT_TRANSPORT_SECURE;

tls_config->peer_verify = CONFIG_PEER_VERIFY;
tls_config->cipher_count = 0;
tls_config->cipher_list = NULL;
tls_config->sec_tag_count = ARRAY_SIZE(sec_tag_list);
tls_config->sec_tag_list = sec_tag_list;
tls_config->hostname = CONFIG_MQTT_BROKER_HOSTNAME;
#else /* MQTT transport configuration */
client->transport.type = MQTT_TRANSPORT_NON_SECURE;
#endif /* defined(CONFIG_MQTT_LIB_TLS) */
}

[Martin Lesund]

Thank you.
I will update the sample to reflect your feedback, so it can be helpful for others in the community as well