RE: MQTT - Cannot connect to broker when using username and PW

MANGO — Fri, 29 Jul 2016 15:13:31 GMT

My mistake. Thanks for pointing it out and it works as you mentioned.

RE: MQTT - Cannot connect to broker when using username and PW

Stian Røed Hafskjold — Wed, 27 Jul 2016 15:02:51 GMT

Hi, the problem is how you declare and define the mqtt_utf8_t pw and user variables, and also the strings within them. Remember that you pass the pointers to the m_app_mqtt_client varable, so when the function returns they will no longer be valid. You should declare them as global variables at the top of main.c. Something like this should work:

static uint8_t username[] = "test";
static uint8_t password[] = "test";
static mqtt_utf8_t pw;
static mqtt_utf8_t user;

And then in button_event_handler() you can assign the values:

pw.p_utf_str = password;
pw.utf_strlen = strlen(password);
user.p_utf_str = username;
user.utf_strlen = strlen(username);

And pass the pointers m_app_mqtt_client:

m_app_mqtt_client.p_password           = &pw;
m_app_mqtt_client.p_user_name          = &user;

PS. I also tried with Mosquitto and the Auth plugin, and I got it working by following the guide you linked to. Just remember to get the apostrophes right ('%s') if you are copy/pasting the /etc/mosquitto/mosquitto.conf example directly. I also had to do the fix described here: github.com/.../33