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;
}
// create the MQTT client
int rc = 0;
rc = MQTTClient_create(&client, const_cast<char *>(host),
const_cast<char *>(clientID), MQTTCLIENT_PERSISTENCE_NONE, NULL);
if (rc != MQTTCLIENT_SUCCESS) {
std::cerr << "Failed to create MQTT client, exiting" << std::endl;
exit(rc);
}
// setup call backs before connecting the client to the server
MQTTClient_setCallbacks(client, NULL,
&connection_lost, NULL, &delivery_complete);
MQTTClient_connectOptions data = MQTTClient_connectOptions_initializer;
data.username = const_cast<char *>(username);
data.password = const_cast<char *>(password);
// connect the client to the server
rc = MQTTClient_connect(client, &data);
if (rc != MQTTCLIENT_SUCCESS) {
std::cerr << "Failed to connect MQTT client, exiting" << std::endl;
exit(rc);
}
// led connected to D3 (digital out)
upm::GroveLed* led = new upm::GroveLed(3);
// temperature sensor connected to A0 (analog in)
upm::GroveTemp* temp_sensor = new upm::GroveTemp(0);
// simple error checking
if ((led == NULL) || (temp_sensor == NULL)) {
std::cerr << "Can't create all objects, exiting" << std::endl;
return mraa::ERROR_UNSPECIFIED;
}
// loop forever updating the temperature values every second
for (;;) {
temperature_update(temp_sensor, led);
sleep(1);
}
printf("Stopping\n");
int timeout = 100;
MQTTClient_disconnect(client, timeout);
MQTTClient_destroy(&client);
return mraa::SUCCESS;
}
/// blink the radio LED if we have not received any packets
///
static void
link_update(void)
{
static uint8_t unlock_count, temperature_count;
if (received_packet) {
unlock_count = 0;
received_packet = false;
} else {
unlock_count++;
}
if (unlock_count < 6) {
LED_RADIO = LED_ON;
} else {
LED_RADIO = blink_state;
blink_state = !blink_state;
}
if (unlock_count > 40) {
// if we have been unlocked for 20 seconds
// then start frequency scanning again
unlock_count = 5;
// randomise the next transmit window using some
// entropy from the radio if we have waited
// for a full set of hops with this time base
if (timer_entropy() & 1) {
register uint16_t old_remaining = tdm_state_remaining;
if (tdm_state_remaining > silence_period) {
tdm_state_remaining -= packet_latency;
} else {
tdm_state_remaining = 1;
}
if (at_testmode & AT_TEST_TDM) {
printf("TDM: change timing %u/%u\n",
(unsigned)old_remaining,
(unsigned)tdm_state_remaining);
}
}
if (at_testmode & AT_TEST_TDM) {
printf("TDM: scanning\n");
}
fhop_set_locked(false);
}
if (unlock_count != 0) {
statistics.average_rssi = (radio_last_rssi() + 3*(uint16_t)statistics.average_rssi)/4;
// reset statistics when unlocked
statistics.receive_count = 0;
}
if (unlock_count > 5) {
memset(&remote_statistics, 0, sizeof(remote_statistics));
}
test_display = at_testmode;
send_statistics = 1;
temperature_count++;
if (temperature_count == 4) {
// check every 2 seconds
temperature_update();
temperature_count = 0;
}
}