David Docampo / Mbed OS TemperatureAlarm

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   MbedJSONValue mbed-http HTS221 IoTKit

main.cpp@2:a91d74f48f9a, 2020-12-18 (annotated)

Committer:
sayhey
Date:
Fri Dec 18 19:56:38 2020 +0000
Revision:
2:a91d74f48f9a
Parent:
1:06af85d78aa1 
Ready for publication

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sayhey 0:6c6307c24f92 1 #include "mbed.h"
sayhey 0:6c6307c24f92 2 #include "https_request.h"
sayhey 0:6c6307c24f92 3 #include "network-helper.h"
sayhey 0:6c6307c24f92 4 #include "TCPSocket.h"
sayhey 0:6c6307c24f92 5 #include "NTPClient.h"
sayhey 0:6c6307c24f92 6 #include "HTS221Sensor.h"
sayhey 0:6c6307c24f92 7 #include "MbedJSONValue.h"
sayhey 0:6c6307c24f92 8 #include "OLEDDisplay.h"
sayhey 0:6c6307c24f92 9
sayhey 0:6c6307c24f92 10 // Name of the Device shown on Website
sayhey 2:a91d74f48f9a 11 char* DeviceName = "ENTER_YOUR_DEVICE_NAME_HERE";
sayhey 0:6c6307c24f92 12
sayhey 0:6c6307c24f92 13 // API Token
sayhey 2:a91d74f48f9a 14 char* token = "Bearer ENTER_API_TOKEN_HERE";
sayhey 0:6c6307c24f92 15
sayhey 0:6c6307c24f92 16 // Route to submit Temp
sayhey 2:a91d74f48f9a 17 char* ApiRoute = "ENTER_API_ENDPOINT_HERE";
sayhey 0:6c6307c24f92 18
sayhey 0:6c6307c24f92 19 // Trusted Root Certs
sayhey 0:6c6307c24f92 20 const char* DST_ROOT_CA_X3 = "-----BEGIN CERTIFICATE-----\n"
sayhey 0:6c6307c24f92 21 "MIIDSjCCAjKgAwIBAgIQRK+wgNajJ7qJMDmGLvhAazANBgkqhkiG9w0BAQUFADA/\n"
sayhey 0:6c6307c24f92 22 "MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT\n"
sayhey 0:6c6307c24f92 23 "DkRTVCBSb290IENBIFgzMB4XDTAwMDkzMDIxMTIxOVoXDTIxMDkzMDE0MDExNVow\n"
sayhey 0:6c6307c24f92 24 "PzEkMCIGA1UEChMbRGlnaXRhbCBTaWduYXR1cmUgVHJ1c3QgQ28uMRcwFQYDVQQD\n"
sayhey 0:6c6307c24f92 25 "Ew5EU1QgUm9vdCBDQSBYMzCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEB\n"
sayhey 0:6c6307c24f92 26 "AN+v6ZdQCINXtMxiZfaQguzH0yxrMMpb7NnDfcdAwRgUi+DoM3ZJKuM/IUmTrE4O\n"
sayhey 0:6c6307c24f92 27 "rz5Iy2Xu/NMhD2XSKtkyj4zl93ewEnu1lcCJo6m67XMuegwGMoOifooUMM0RoOEq\n"
sayhey 0:6c6307c24f92 28 "OLl5CjH9UL2AZd+3UWODyOKIYepLYYHsUmu5ouJLGiifSKOeDNoJjj4XLh7dIN9b\n"
sayhey 0:6c6307c24f92 29 "xiqKqy69cK3FCxolkHRyxXtqqzTWMIn/5WgTe1QLyNau7Fqckh49ZLOMxt+/yUFw\n"
sayhey 0:6c6307c24f92 30 "7BZy1SbsOFU5Q9D8/RhcQPGX69Wam40dutolucbY38EVAjqr2m7xPi71XAicPNaD\n"
sayhey 0:6c6307c24f92 31 "aeQQmxkqtilX4+U9m5/wAl0CAwEAAaNCMEAwDwYDVR0TAQH/BAUwAwEB/zAOBgNV\n"
sayhey 0:6c6307c24f92 32 "HQ8BAf8EBAMCAQYwHQYDVR0OBBYEFMSnsaR7LHH62+FLkHX/xBVghYkQMA0GCSqG\n"
sayhey 0:6c6307c24f92 33 "SIb3DQEBBQUAA4IBAQCjGiybFwBcqR7uKGY3Or+Dxz9LwwmglSBd49lZRNI+DT69\n"
sayhey 0:6c6307c24f92 34 "ikugdB/OEIKcdBodfpga3csTS7MgROSR6cz8faXbauX+5v3gTt23ADq1cEmv8uXr\n"
sayhey 0:6c6307c24f92 35 "AvHRAosZy5Q6XkjEGB5YGV8eAlrwDPGxrancWYaLbumR9YbK+rlmM6pZW87ipxZz\n"
sayhey 0:6c6307c24f92 36 "R8srzJmwN0jP41ZL9c8PDHIyh8bwRLtTcm1D9SZImlJnt1ir/md2cXjbDaJWFBM5\n"
sayhey 0:6c6307c24f92 37 "JDGFoqgCWjBH4d1QB7wCCZAA62RjYJsWvIjJEubSfZGL+T0yjWW06XyxV3bqxbYo\n"
sayhey 0:6c6307c24f92 38 "Ob8VZRzI9neWagqNdwvYkQsEjgfbKbYK7p2CNTUQ\n"
sayhey 0:6c6307c24f92 39 "-----END CERTIFICATE-----\n";
sayhey 0:6c6307c24f92 40
sayhey 0:6c6307c24f92 41 // Declare LEDs
sayhey 0:6c6307c24f92 42 DigitalOut Led1(MBED_CONF_IOTKIT_LED1);
sayhey 0:6c6307c24f92 43 DigitalOut Led2(MBED_CONF_IOTKIT_LED2);
sayhey 0:6c6307c24f92 44 DigitalOut Led3(MBED_CONF_IOTKIT_LED3);
sayhey 0:6c6307c24f92 45 DigitalOut Led4(MBED_CONF_IOTKIT_LED4);
sayhey 0:6c6307c24f92 46
sayhey 0:6c6307c24f92 47 // OLED Init
sayhey 0:6c6307c24f92 48 OLEDDisplay oled( MBED_CONF_IOTKIT_OLED_RST, MBED_CONF_IOTKIT_OLED_SDA, MBED_CONF_IOTKIT_OLED_SCL );
sayhey 0:6c6307c24f92 49
sayhey 0:6c6307c24f92 50 // Temp Sensor Init
sayhey 0:6c6307c24f92 51 static DevI2C devI2c( MBED_CONF_IOTKIT_I2C_SDA, MBED_CONF_IOTKIT_I2C_SCL );
sayhey 0:6c6307c24f92 52 static HTS221Sensor hum_temp(&devI2c);
sayhey 0:6c6307c24f92 53
sayhey 0:6c6307c24f92 54 // Network
sayhey 0:6c6307c24f92 55 NetworkInterface* network;
sayhey 0:6c6307c24f92 56
sayhey 0:6c6307c24f92 57 //Global temp var
sayhey 0:6c6307c24f92 58 float temp;
sayhey 0:6c6307c24f92 59
sayhey 0:6c6307c24f92 60 bool InitTime() {
sayhey 0:6c6307c24f92 61 oled.printf("Getting Time...");
sayhey 0:6c6307c24f92 62 NTPClient ntp(network);
sayhey 0:6c6307c24f92 63 time_t timestamp = ntp.get_timestamp();
sayhey 0:6c6307c24f92 64
sayhey 0:6c6307c24f92 65 if (timestamp < 0) {
sayhey 0:6c6307c24f92 66 printf("An error occurred when getting the time. Code: %ld\r\n", timestamp);
sayhey 0:6c6307c24f92 67 return false;
sayhey 0:6c6307c24f92 68 }
sayhey 0:6c6307c24f92 69 else {
sayhey 0:6c6307c24f92 70 set_time(timestamp);
sayhey 0:6c6307c24f92 71 return true;
sayhey 0:6c6307c24f92 72 }
sayhey 0:6c6307c24f92 73 }
sayhey 0:6c6307c24f92 74
sayhey 0:6c6307c24f92 75 bool InitializeNetwork() {
sayhey 0:6c6307c24f92 76
sayhey 0:6c6307c24f92 77 oled.clear();
sayhey 0:6c6307c24f92 78 oled.printf("Trying to Connect to Network...\n");
sayhey 0:6c6307c24f92 79 printf("Trying to Connect to Network...\n");
sayhey 0:6c6307c24f92 80
sayhey 0:6c6307c24f92 81 // Network Init
sayhey 0:6c6307c24f92 82 network = connect_to_default_network_interface();
sayhey 0:6c6307c24f92 83 oled.clear();
sayhey 0:6c6307c24f92 84
sayhey 0:6c6307c24f92 85 if (!network) {
sayhey 0:6c6307c24f92 86 oled.printf("Cannot connect to the network\n");
sayhey 0:6c6307c24f92 87 printf("Cannot connect to the network\n");
sayhey 0:6c6307c24f92 88 return false;
sayhey 0:6c6307c24f92 89 }
sayhey 0:6c6307c24f92 90 else {
sayhey 0:6c6307c24f92 91 oled.printf("Connected to Network\n");
sayhey 0:6c6307c24f92 92 printf("Connected to Network\n");
sayhey 0:6c6307c24f92 93 return true;
sayhey 0:6c6307c24f92 94 }
sayhey 0:6c6307c24f92 95 }
sayhey 0:6c6307c24f92 96
sayhey 0:6c6307c24f92 97 void PrintTemp() {
sayhey 0:6c6307c24f92 98 oled.clear();
sayhey 0:6c6307c24f92 99 printf("Temp: %3.2f\n", temp);
sayhey 0:6c6307c24f92 100 oled.printf("Temp: %3.2f\n", temp);
sayhey 0:6c6307c24f92 101 }
sayhey 0:6c6307c24f92 102
sayhey 0:6c6307c24f92 103 char* SendRequest(float temperature) {
sayhey 0:6c6307c24f92 104
sayhey 0:6c6307c24f92 105 char stringTemp[20];
sayhey 0:6c6307c24f92 106 sprintf(stringTemp, "%f", temperature);
sayhey 0:6c6307c24f92 107 char timeBuffer[32];
sayhey 0:6c6307c24f92 108
sayhey 0:6c6307c24f92 109 time_t seconds = time(NULL);
sayhey 0:6c6307c24f92 110
sayhey 0:6c6307c24f92 111 strftime(timeBuffer, 32, "%F %T", localtime(&seconds));
sayhey 0:6c6307c24f92 112
sayhey 0:6c6307c24f92 113 HttpsRequest* post_req = new HttpsRequest(network, DST_ROOT_CA_X3, HTTP_POST, ApiRoute);
sayhey 0:6c6307c24f92 114 post_req->set_header("Content-Type", "application/json");
sayhey 0:6c6307c24f92 115 post_req->set_header("Authorization", token);
sayhey 0:6c6307c24f92 116
sayhey 0:6c6307c24f92 117 char body[255] = "{\"recorded\":\"";
sayhey 0:6c6307c24f92 118 strcat(body, stringTemp);
sayhey 0:6c6307c24f92 119 strcat(body, "\",\"recorded_at\":\"");
sayhey 0:6c6307c24f92 120 strcat(body, timeBuffer);
sayhey 0:6c6307c24f92 121 strcat(body, "\",\"device\":\"");
sayhey 0:6c6307c24f92 122 strcat(body, DeviceName);
sayhey 0:6c6307c24f92 123 strcat(body, "\"}");
sayhey 0:6c6307c24f92 124
sayhey 0:6c6307c24f92 125 printf("%s\n", body);
sayhey 0:6c6307c24f92 126
sayhey 0:6c6307c24f92 127 HttpResponse* post_res = post_req->send(body, strlen(body));
sayhey 0:6c6307c24f92 128 if (!post_res) {
sayhey 0:6c6307c24f92 129 printf("HttpRequest failed (error code %d)\n", post_req->get_error());
sayhey 0:6c6307c24f92 130 }
sayhey 0:6c6307c24f92 131
sayhey 0:6c6307c24f92 132 char* resp = (char*)post_res->get_body_as_string().c_str();
sayhey 0:6c6307c24f92 133
sayhey 0:6c6307c24f92 134 delete post_req;
sayhey 0:6c6307c24f92 135 printf("%s\n", resp);
sayhey 0:6c6307c24f92 136 return resp;
sayhey 0:6c6307c24f92 137 }
sayhey 0:6c6307c24f92 138
sayhey 0:6c6307c24f92 139 void SetLEDStatusCode(char* response) {
sayhey 0:6c6307c24f92 140 MbedJSONValue parser;
sayhey 0:6c6307c24f92 141
sayhey 0:6c6307c24f92 142 parse(parser, response);
sayhey 0:6c6307c24f92 143
sayhey 0:6c6307c24f92 144 int statusCode;
sayhey 0:6c6307c24f92 145
sayhey 0:6c6307c24f92 146 statusCode = parser["code"].get<int>();
sayhey 0:6c6307c24f92 147
sayhey 0:6c6307c24f92 148 if (statusCode == 0) {
sayhey 0:6c6307c24f92 149 PrintTemp();
sayhey 0:6c6307c24f92 150 Led1.write(0);
sayhey 0:6c6307c24f92 151 Led2.write(0);
sayhey 0:6c6307c24f92 152 Led3.write(0);
sayhey 0:6c6307c24f92 153 Led4.write(0);
sayhey 0:6c6307c24f92 154 }
sayhey 0:6c6307c24f92 155 else if(statusCode == 1) {
sayhey 0:6c6307c24f92 156 PrintTemp();
sayhey 0:6c6307c24f92 157 printf("Temperature is above the limits!\n");
sayhey 0:6c6307c24f92 158 oled.printf("Temperature is above the limits!\n");
sayhey 0:6c6307c24f92 159 Led1.write(1);
sayhey 0:6c6307c24f92 160 Led2.write(0);
sayhey 0:6c6307c24f92 161 Led3.write(0);
sayhey 0:6c6307c24f92 162 Led4.write(0);
sayhey 0:6c6307c24f92 163 }
sayhey 0:6c6307c24f92 164 else if(statusCode == 2) {
sayhey 0:6c6307c24f92 165 PrintTemp();
sayhey 0:6c6307c24f92 166 printf("Temperature is below the limits!\n");
sayhey 0:6c6307c24f92 167 oled.printf("Temperature is below the limits!\n");
sayhey 0:6c6307c24f92 168 Led1.write(0);
sayhey 0:6c6307c24f92 169 Led2.write(1);
sayhey 0:6c6307c24f92 170 Led3.write(0);
sayhey 0:6c6307c24f92 171 Led4.write(0);
sayhey 0:6c6307c24f92 172 }
sayhey 0:6c6307c24f92 173 else if(statusCode == 3) {
sayhey 0:6c6307c24f92 174 PrintTemp();
sayhey 0:6c6307c24f92 175 printf("Undefined Error!\n");
sayhey 0:6c6307c24f92 176 oled.printf("Undefined Error!\n");
sayhey 0:6c6307c24f92 177 Led1.write(0);
sayhey 0:6c6307c24f92 178 Led2.write(0);
sayhey 0:6c6307c24f92 179 Led3.write(1);
sayhey 0:6c6307c24f92 180 Led4.write(0);
sayhey 0:6c6307c24f92 181 }
sayhey 0:6c6307c24f92 182 else if(statusCode == 4) {
sayhey 0:6c6307c24f92 183 PrintTemp();
sayhey 0:6c6307c24f92 184 printf("Undefined Error!\n");
sayhey 0:6c6307c24f92 185 Led1.write(0);
sayhey 0:6c6307c24f92 186 Led2.write(0);
sayhey 0:6c6307c24f92 187 Led3.write(0);
sayhey 0:6c6307c24f92 188 Led4.write(1);
sayhey 0:6c6307c24f92 189 }
sayhey 0:6c6307c24f92 190 }
sayhey 0:6c6307c24f92 191
sayhey 0:6c6307c24f92 192 void InitializeTempSensor() {
sayhey 0:6c6307c24f92 193
sayhey 0:6c6307c24f92 194 hum_temp.init(NULL);
sayhey 0:6c6307c24f92 195 hum_temp.enable();
sayhey 0:6c6307c24f92 196 }
sayhey 0:6c6307c24f92 197
sayhey 0:6c6307c24f92 198 int main() {
sayhey 0:6c6307c24f92 199
sayhey 0:6c6307c24f92 200 if (!InitializeNetwork()) {
sayhey 0:6c6307c24f92 201 return 1;
sayhey 0:6c6307c24f92 202 }
sayhey 0:6c6307c24f92 203
sayhey 0:6c6307c24f92 204 if (!InitTime()) {
sayhey 0:6c6307c24f92 205 return 1;
sayhey 0:6c6307c24f92 206 }
sayhey 0:6c6307c24f92 207
sayhey 0:6c6307c24f92 208 time_t seconds = time(NULL);
sayhey 0:6c6307c24f92 209 printf("\rDate & Time: \r%s", ctime(&seconds));
sayhey 0:6c6307c24f92 210
sayhey 0:6c6307c24f92 211 InitializeTempSensor();
sayhey 0:6c6307c24f92 212
sayhey 0:6c6307c24f92 213 wait(2);
sayhey 0:6c6307c24f92 214
sayhey 0:6c6307c24f92 215 while (true) {
sayhey 0:6c6307c24f92 216 oled.clear();
sayhey 0:6c6307c24f92 217 hum_temp.get_temperature(&temp);
sayhey 0:6c6307c24f92 218 SetLEDStatusCode(SendRequest(temp));
sayhey 0:6c6307c24f92 219 }
sayhey 0:6c6307c24f92 220 }