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mqtt esp8266
Dependencies: X_NUCLEO_IKS01A3
PMK2021_MQTT_ESP8266_IKS01A3
main.cpp
- Committer:
- nenad
- Date:
- 2021-04-27
- Revision:
- 4:c737f3d85a19
- Parent:
- 1:276a09a95334
File content as of revision 4:c737f3d85a19:
#include "mbed.h" #include "platform/mbed_thread.h" #include <MQTTClientMbedOs.h> #include "XNucleoIKS01A3.h" // Blinking rate in milliseconds #define BLINKING_RATE_MS 500 // Initialise the digital pin LED1 as an output DigitalOut led(LED1); /* Instantiate the expansion board */ static XNucleoIKS01A3 *mems_expansion_board = XNucleoIKS01A3::instance(D14, D15, D4, D5, A3, D6, A4); /* Retrieve the composing elements of the expansion board */ static STTS751Sensor *t_sensor = mems_expansion_board->t_sensor; volatile int mems_event = 0; uint32_t previous_tick = 0; uint32_t current_tick = 0; uint8_t high = 0, low = 0; float temperature = 0.0f; char buffer[32]; void INT_cb(); /* Helper function for printing floats & doubles */ static char *print_double(char *str, double v, int decimalDigits = 2) { int i = 1; int intPart, fractPart; int len; char *ptr; /* prepare decimal digits multiplicator */ for (; decimalDigits != 0; i *= 10, decimalDigits--); /* calculate integer & fractinal parts */ intPart = (int)v; fractPart = (int)((v - (double)(int)v) * i); /* fill in integer part */ sprintf(str, "%i.", intPart); /* prepare fill in of fractional part */ len = strlen(str); ptr = &str[len]; /* fill in leading fractional zeros */ for (i /= 10; i > 1; i /= 10, ptr++) { if (fractPart >= i) { break; } *ptr = '0'; } /* fill in (rest of) fractional part */ sprintf(ptr, "%i", fractPart); return str; } InterruptIn button(USER_BUTTON); int arrivedcount = 0; TCPSocket socket; MQTTClient client(&socket); MQTT::Message message; int button_pressed=0; char* topic_pub = "PMK-client-temperature"; char* topic_sub = "PMK-client-topic_sub"; WiFiInterface *wifi; const char *sec2str(nsapi_security_t sec) { switch (sec) { case NSAPI_SECURITY_NONE: return "None"; case NSAPI_SECURITY_WEP: return "WEP"; case NSAPI_SECURITY_WPA: return "WPA"; case NSAPI_SECURITY_WPA2: return "WPA2"; case NSAPI_SECURITY_WPA_WPA2: return "WPA/WPA2"; case NSAPI_SECURITY_UNKNOWN: default: return "Unknown"; } } int scan_demo(WiFiInterface *wifi) { WiFiAccessPoint *ap; printf("Scan:\n"); int count = wifi->scan(NULL,0); if (count <= 0) { printf("scan() failed with return value: %d\n", count); return 0; } /* Limit number of network arbitrary to 15 */ count = count < 15 ? count : 15; ap = new WiFiAccessPoint[count]; count = wifi->scan(ap, count); if (count <= 0) { printf("scan() failed with return value: %d\n", count); return 0; } for (int i = 0; i < count; i++) { printf("Network: %s secured: %s BSSID: %hhX:%hhX:%hhX:%hhx:%hhx:%hhx RSSI: %hhd Ch: %hhd\n", ap[i].get_ssid(), sec2str(ap[i].get_security()), ap[i].get_bssid()[0], ap[i].get_bssid()[1], ap[i].get_bssid()[2], ap[i].get_bssid()[3], ap[i].get_bssid()[4], ap[i].get_bssid()[5], ap[i].get_rssi(), ap[i].get_channel()); } printf("%d networks available.\n", count); delete[] ap; return count; } void messageArrived(MQTT::MessageData& md) { MQTT::Message &message = md.message; printf("Message arrived: qos %d, retained %d, dup %d, packetid %d\r\n", message.qos, message.retained, message.dup, message.id); printf("Payload %.*s\r\n", message.payloadlen, (char*)message.payload); ++arrivedcount; } void buttonFunction() { button_pressed=1; } int main() { /* Attach callback to STTS751 INT */ t_sensor->attach_int_irq(&INT_cb); /* Enable STTS751 temperature sensor */ t_sensor->enable(); /* Set ODR to 4Hz */ t_sensor->set_odr(4.0f); /* Set Low Temperature Threshold */ t_sensor->set_low_temp_thr(22.0f); /* Set High Temperature Threshold */ t_sensor->set_high_temp_thr(28.0f); /* Enable Event pin */ t_sensor->set_event_pin(1); /* Get beginning status */ t_sensor->get_temp_limit_status(NULL, NULL, NULL); button.rise(&buttonFunction); // attach the address of the flip function to the rising edge const char* hostname = "broker.mqttdashboard.com"; int port = 1883; wifi = WiFiInterface::get_default_instance(); if (!wifi) { printf("ERROR: No WiFiInterface found.\n"); return -1; } int count = scan_demo(wifi); if (count == 0) { printf("No WIFI APs found - can't continue further.\n"); return -1; } printf("\nConnecting to %s...\n", MBED_CONF_APP_WIFI_SSID); int ret = wifi->connect(MBED_CONF_APP_WIFI_SSID, MBED_CONF_APP_WIFI_PASSWORD, NSAPI_SECURITY_WPA_WPA2); if (ret != 0) { printf("\nConnection error: %d\n", ret); return -1; } printf("Success\n\n"); printf("MAC: %s\n", wifi->get_mac_address()); printf("IP: %s\n", wifi->get_ip_address()); printf("Netmask: %s\n", wifi->get_netmask()); printf("Gateway: %s\n", wifi->get_gateway()); printf("RSSI: %d\n\n", wifi->get_rssi()); socket.open(wifi); socket.connect(hostname, port); int rc=0; MQTTPacket_connectData data = MQTTPacket_connectData_initializer; data.MQTTVersion = 3; data.clientID.cstring = "PMK-client"; //data.username.cstring = "testuser"; //data.password.cstring = "testpassword"; if ((rc = client.connect(data)) != 0) printf("rc from MQTT connect is %d\r\n", rc); if ((rc = client.subscribe(topic_sub, MQTT::QOS2, messageArrived)) != 0) printf("rc from MQTT subscribe is %d\r\n", rc); while (true) { t_sensor->get_temperature(&temperature); printf("Temp[C]: %7s C\r\n", print_double(buffer, temperature)); led = !led; thread_sleep_for(BLINKING_RATE_MS); if (button_pressed==1) { button_pressed=0; printf("Publishing data\r\n"); // QoS 0 char buf[100]; sprintf(buf, "Temp[C]: %7s C\r\n", print_double(buffer, temperature)); message.qos = MQTT::QOS0; message.retained = false; message.dup = false; message.payload = (void*)buf; message.payloadlen = strlen(buf)+1; client.publish(topic_pub, message); } printf("Yielding"); client.yield(1000); printf(" -> Yielded\r\n"); } } void INT_cb() { mems_event = 1; }