Hi guys I am using this with paho c, both installed using VCPKG and used in a C++ console app. I attempting to convert message->payload to json so I can access the elements of the response. This works sometimes but in others I get errors such as:
"parse error - unexpected 's'; expected end of input"
Exactly the same response is work and not working randomly. This is the code which is the on message arrived callback from paho:
int msgarrvd(void *context, char *topicName, int topicLen, MQTTAsync_message *message)
{
int i;
const char* payloadptr;
payloadptr = (const char*)message->payload;
std::cout << payloadptr;
std::vector<std::string> v = explode("/", topicName);
std::string s(payloadptr);
std::cout << s;
json data = json::parse(s+'\n');
std::cout << data["Command"];
if (v[4]=="Commands") {
}
MQTTAsync_freeMessage(&message);
MQTTAsync_free(topicName);
return 1;
}
Example response:
{"Sensor":"CCTV","SensorID":130,"Command":"Capture","CommandValue":"Face"}
Hi guys I am using this with paho c, both installed using VCPKG and used in a C++ console app. I attempting to convert message->payload to json so I can access the elements of the response. This works sometimes but in others I get errors such as:
"parse error - unexpected 's'; expected end of input"
Exactly the same response is work and not working randomly. This is the code which is the on message arrived callback from paho:
Example response:
{"Sensor":"CCTV","SensorID":130,"Command":"Capture","CommandValue":"Face"}