Size of message to be sent

[Biribu]

I am trying to send some data to my mqtt broker and I have found that as soon as the message contains a 0, the rest of it is not paid attention.

For example: char a[10]; a[0] = 3; a[1] = 2; a[2] = 0; a[3] = 4;

The message received in broker seems to be 32 and nothing else.

I trying with photon 0.5.3

Is there a way to specify the length of the message so it can contains whatever I want?

[hirotakaster]

hi, could you show your code? I did not get that.

[Biribu]

Sure.

I have a char array declared as: char frameRegister[30];

Then, inside a function (which connects to my mqtt server and sends a frame):

for(i = 0; i < 30; i++) { frameRegister[i] = 0; } frameRegister[0] = mac[0]; frameRegister[1] = 3; frameRegister[2] = 5; frameRegister[3] = 5; frameRegister[4] = 6; frameRegister[5] = 7; frameRegister[6] = 0; frameRegister[7] = 255;

client->connect("clientId"); if (client->isConnected()) { client->publish("frame/service",frameRegister); }

On mqtt.fx client, I just get the message until 7, no 0 and no 255.

[hirotakaster]

use like this,

uint8_t frameRegister[30];
....
client->publish("frame/service",frameRegister, sizeof(frameRegister), false, MQTT::QOS0,  NULL);

you have to tell frameRegister size to MQTT client.

[hirotakaster]

or simple version is this

uint8_t frameRegister[30];
...
client->publish("frame/service",frameRegister, sizeof(frameRegister));

try this.

[hirotakaster]

@Biribu close this issue?

[Biribu]

Sure. Thank you @hirotakaster , that resolved my problem.