/**
* @brief Write data to the cloud
* Note: you have to register components prior.
* E.g. using "iotkit-admin register <comp_name> <catalogid>" or via iotkit-agent
*/
void writeDataToCloud(string &component, string &data) {
UdpClient client;
stringstream ss;
/* Create a udp connection for iotkit-agent to communicate over */
if (client.isConnected() == false) {
if (client.connectUdp(NODE, SERVICE) < 0) {
cerr << "connection failed" << endl;
exit(EXIT_FAILURE);
}
}
/*
* Create the string to send to the cloud
* eg. {"n":"gpsv1","v":"45.550953, -122.968719"}
*/
ss << "{\"n\":\"" << component << "\",\"v\":\"" << data << "\"}" << endl;
cout << ss.str();
if (client.writeData(ss) < 0)
cerr << "Cannot write to cloud\n" << endl;
ss.str("");
}
int main()
{
// check that we are running on Galileo or Edison
mraa::Platform platform = mraa::getPlatformType();
if ((platform != mraa::INTEL_GALILEO_GEN1) &&
(platform != mraa::INTEL_GALILEO_GEN2) &&
(platform != mraa::INTEL_EDISON_FAB_C)) {
std::cerr << "Unsupported platform, exiting" << std::endl;
return mraa::ERROR_INVALID_PLATFORM;
}
// UdpClient class is wrapper for sending UDP data to iotkit-agent
UdpClient client;
if (client.connectUdp(NODE, SERVICE) < 0) {
std::cerr << "Connection to iotkit-agent failed, exiting" << std::endl;
return mraa::ERROR_UNSPECIFIED;
}
// create an analog input object from MRAA using pin A0
mraa::Aio* a_pin = new mraa::Aio(0);
if (a_pin == NULL) {
std::cerr << "Can't create mraa::Aio object, exiting" << std::endl;
return mraa::ERROR_UNSPECIFIED;
}
// loop forever sending the input value every second
for (;;) {
uint16_t data = a_pin->read();
std::stringstream ss;
ss << "{\"n\":\"" << COMP_NAME << "\",\"v\":" << data << "}" << std::endl;
client.writeData(ss);
sleep(1);
}
return mraa::SUCCESS;
}
