Unable to Configure MQTT Client ID using Adafruit MQTT Library

Question

I am utilizing the MQTT library that Adafruit has created, located here , and the library itself works wonderfully - however I am finding myself unable to edit the Client ID or configure the PINGRESP. The code that I am currently using can be seen below -

WiFiClient client;
Adafruit_MQTT_Client mqtt(&client, "10.116.10.191", 1883);

When the client connects to the MQTT Broker the client ID turns into a random string of letters, numbers, and symbols, as seen below -

1534023607: Client ]7llG5K6J4=^tPHJHqgTUFc<Ep^m3vJ`4vSL2oB<cO[^_chw[GBp]v3smagpOqWS has exceeded timeout, disconnecting.
1534023608: New connection from 10.116.7.21 on port 1883.
1534023608: New client connected from 10.116.7.21 as ^k_aQq];7xigbIUD`htDex>IPfAoNX:4JiUkR9vY9WG[`m`GL[KqZJAk7RaEkkIu (c1, k300).
1534023608: Sending CONNACK to ^k_aQq];7xigbIUD`htDex>IPfAoNX:4JiUkR9vY9WG[`m`GL[KqZJAk7RaEkkIu (0)
1534023608: Received SUBSCRIBE from ^k_aQq];7xigbIUD`htDex>IPfAoNX:4JiUkR9vY9WG[`m`GL[KqZJAk7RaEkkIu
1534023608:     quantity (QoS 0)
1534023608: ^k_aQq];7xigbIUD`htDex>IPfAoNX:4JiUkR9vY9WG[`m`GL[KqZJAk7RaEkkIu 0 quantity
1534023608: Sending SUBACK to ^k_aQq];7xigbIUD`htDex>IPfAoNX:4JiUkR9vY9WG[`m`GL[KqZJAk7RaEkkIu

After a duration of time has passed the client exceeds the time out and disconnects.. Any advice on overcoming this obstacle would be greatly appreciated

Answer 1

Looking at the source for the library the implication is that you should pass the clientid in as an argument to the client constructor after the broker port.

 Adafruit_MQTT_Client(Client *client, const char *server, uint16_t port,
   const char *cid, const char *user, const char *pass):

From here

eg

WiFiClient client;
Adafruit_MQTT_Client mqtt(&client, "10.116.10.191", 1883, "clientfoo");

Also see this blog post from adafruit