PubNubDemo.cpp

00001 #include <cstring>
00002 
00003 #include "mbed.h"
00004 #include "rtos.h"
00005 //#include "C12832.h"
00006 //#include "MMA7660.h"
00007 #include "MMA7455.h"
00008 #include "LM75B.h"
00009 
00010 #include "picojson.h"
00011 #include "PubNub.h"
00012 
00013 #include "sdram.h"
00014 
00015 //------------------------------------------------------------------------------------
00016 // You need to configure these cellular modem / SIM parameters.
00017 // These parameters are ignored for LISA-C200 variants and can be left NULL.
00018 //------------------------------------------------------------------------------------
00019 #include "MDM.h"
00020 //! Set your secret SIM pin here (e.g. "1234"). Check your SIM manual.
00021 #define SIMPIN      NULL
00022 /*! The APN of your network operator SIM, sometimes it is "internet" check your 
00023     contract with the network operator. You can also try to look-up your settings in 
00024     google: https://www.google.de/search?q=APN+list */
00025 #define APN         "online.telia.se"
00026 //! Set the user name for your APN, or NULL if not needed
00027 #define USERNAME    NULL
00028 //! Set the password for your APN, or NULL if not needed
00029 #define PASSWORD    NULL 
00030 //------------------------------------------------------------------------------------
00031 
00032 /* Demo of PubNub + the mbed application board. */
00033 
00034 /* How to get things set up: */
00035 /* 1. Tune in at the PubNub Developer Console, with the following
00036  * keys (press Subscribe afterwards): */
00037 const char pubkey[] = "demo";
00038 const char subkey[] = "demo";
00039 //const char channel[] = "mbed";
00040 const char channel_pub[] = "mbed_data";
00041 const char channel_sub[] = "mbed_cmd";
00042 /* 2. Attach your mbed board to your computer. A folder should pop up like
00043  * if you plug in a USB memory stick. */
00044 /* 3. Open this example in the mbed web IDE and hit the Compile button. */
00045 /* 4. A download popup with a .bin file will appear; save it in the USB
00046  * mbed folder. */
00047 /* 5. Press reset button on the mbed to start things up. */
00048 
00049 /* You will see the board publish a "status" message that shows its
00050  * current temperature and physical tilt.  The board's LCD should
00051  * print some progress messages regarding that. */
00052 /* You can make the board do things too, by sending messages like:
00053  * { "send_status": true }
00054  * { "lcd": "Hi there!" }
00055  * { "beep": true }
00056  * { "led": {"r": 0.5, "g": 1, "b": 0} }
00057  * Try it out! Paste these in the Message window and press the send icon.
00058  */
00059 
00060 Serial pc(USBTX, USBRX); // tx, rx
00061 //MMA7660 MMA(P0_27, P0_28);
00062 MMA7455 MMA(P0_27, P0_28);
00063 LM75B tmp(P0_27, P0_28, LM75B::ADDRESS_1);
00064 //C12832 lcd(D11, D13, D12, D7, D10);
00065 
00066 PwmOut led_r(p25); // RGB LED with 3 PWM outputs for dimmer control
00067 PwmOut led_g(p28);
00068 PwmOut led_b(p26);
00069 //PwmOut speaker(D6); // Speaker with PWM driver
00070 
00071 DigitalOut led1(LED1);
00072 DigitalOut led2(LED2);
00073 DigitalOut led3(LED3);
00074 DigitalOut led4(LED4);
00075 
00076 
00077 bool forceStatusUpdate = true;
00078 
00079 Mutex stdio_mutex; 
00080 
00081 #define safe_printf(...) do { \
00082         stdio_mutex.lock(); \
00083         pc.printf(__VA_ARGS__); \
00084         stdio_mutex.unlock(); \
00085     } while(0)
00086 
00087 #define safe_print_pnub_err(__prefix) do { \
00088         stdio_mutex.lock(); \
00089         if (pnub_err) { \
00090             pc.printf("%s: ERR, code = %d, line = %d\n", (__prefix), pnub_code, pnub_line); \
00091             pnub_err = false; \
00092         } \
00093         stdio_mutex.unlock(); \
00094     } while(0)
00095 
00096 void pnub_err_handler(PubNubRes code, int line) {
00097     stdio_mutex.lock();
00098     if (code != PNR_OK) {
00099         pc.printf("PbuNub:%d  ERROR %d\n", line, code);
00100     }
00101     stdio_mutex.unlock();
00102 }
00103 
00104 void process_msg(PubNub &pn, const char *jsonmsg)
00105 {
00106     /* Use the picojson parser since we want to deal with complex messages.
00107      * If you are short on memory, you can find an example for parsing simple
00108      * JSON messages in the PubNub::subscribe() API docs. */
00109     picojson::value msg;
00110     std::string err = picojson::parse(msg, jsonmsg, jsonmsg + strlen(jsonmsg));
00111     do {
00112         if (!err.empty()) {
00113             safe_printf("JSON parse: %s  \n", err.c_str());
00114             break;
00115         }
00116     
00117         if (msg.get("send_status").get<bool>()) {
00118             //status_msg(pn);
00119             forceStatusUpdate = true;
00120             safe_printf("force_update\n");
00121             break;
00122         }
00123         if (msg.get("lcd").is<std::string>()) {
00124             safe_printf("in: %s  \n", msg.get("lcd").get<std::string>().c_str());
00125             break;
00126         }
00127         if (msg.get("beep").is<bool>()) {
00128             //speaker = msg.get("beep").get<bool>() ? 0.5 : 0;
00129             break;
00130         }
00131         if (msg.get("led").is<picojson::object>()) {
00132             picojson::value led = msg.get("led");
00133             safe_printf("Old RGB { %.3f, %.3f, %.3f }\n", led_r.read(), led_g.read(), led_b.read());
00134             if (led.get("r").is<double>()) led_r = 1.0 - led.get("r").get<double>();
00135             if (led.get("g").is<double>()) led_g = 1.0 - led.get("g").get<double>();
00136             if (led.get("b").is<double>()) led_b = 1.0 - led.get("b").get<double>();
00137             safe_printf("New RGB { %.3f, %.3f, %.3f }\n", led_r.read(), led_g.read(), led_b.read());
00138             break;
00139         }
00140     } while(0);
00141 }
00142 
00143 void publish_thread(void const *args)
00144 {
00145     PubNub pn(pubkey, subkey);
00146     Timer t;
00147     t.start();
00148     Timer tDbg;
00149     int nDbg = 0;
00150     float lastTemp = -3.75f;
00151     while (true) {
00152             
00153         /* Read sensors. */
00154         int m[3];
00155         MMA.read(m[0], m[1], m[2]);
00156         float temp = (float)tmp;
00157     
00158         /* Print on LCD. */
00159         safe_printf("cur: mx=%3d, my=%3d, mz=%3d, t=%.2f  \n", m[0], m[1], m[2], temp);
00160     
00161         if (forceStatusUpdate || (temp != lastTemp)) {
00162             lastTemp = temp;
00163             forceStatusUpdate = false;
00164             
00165             /* Prepare JSON message. */
00166             char jsonmsg[128];
00167 //            snprintf(jsonmsg, sizeof(jsonmsg),
00168 //                    "{\"status\":{\"mx\":%3d,\"my\":%3d,\"mz\":%3d,\"temp\":%.2f}}",
00169 //                    m[0], m[1], m[2], temp);
00170             snprintf(jsonmsg, sizeof(jsonmsg),
00171                     "%%7B%%22status%%22:%%7B%%22mx%%22:%3d,%%22my%%22:%3d,%%22mz%%22:%3d,%%22temp%%22:%.2f%%7D%%7D",
00172                     m[0], m[1], m[2], temp);
00173 
00174             /* Publish on PubNub. */
00175             safe_printf("before publishing\n");
00176             led_r = 0;
00177             tDbg.start();
00178 //            PubNubRes ret = pn.publish(channel_pub, jsonmsg);
00179             PubNubRes ret = pn.publish_urlenc(channel_pub, jsonmsg);
00180             tDbg.stop();
00181             if (++nDbg == 10) {
00182                 safe_printf("10 requests took %d ms, i.e %d ms/req\n", tDbg.read_ms(), tDbg.read_ms()/10);
00183                 tDbg.reset();
00184                 nDbg = 0;
00185             }
00186 
00187             if (ret != PNR_OK) {
00188                 safe_printf("puberr: %d  \n", ret);
00189                 //safe_print_pnub_err("pub");
00190                 forceStatusUpdate = true; // so that we can try again
00191             }
00192             led_r = 1;
00193             safe_printf("after publishing\n");
00194         }
00195         
00196         wait_ms(100);
00197     }
00198 }
00199 
00200 void subscribe_thread(void const *args)
00201 {
00202     PubNub pn(pubkey, subkey);
00203     while(true) {
00204         char *reply = NULL;
00205         PubNubRes ret = pn.subscribe(channel_sub, &reply);
00206         if (ret != PNR_OK) {
00207             safe_printf("suberr: %d  \n", ret);
00208             //safe_print_pnub_err("sub");
00209             wait(1.0);
00210             continue;
00211         }
00212 
00213         if (reply) {
00214             safe_printf("recv(%s)\n", reply);
00215             process_msg(pn, reply);
00216         }
00217 
00218         wait(0.5); // avoid busy loop in bad situations
00219     }
00220 }
00221 
00222 /** Cause the mbed to flash the BLOD (Blue LEDs Of Death) sequence
00223  */
00224 void mbed_die(void)
00225 {
00226     led1 = led2 = 1; led3 = led4 = 0;  // lights out
00227     while(1) {
00228         led1 = 1;
00229         led3 = 1;
00230         wait_ms(100);
00231         led2 = 1;
00232         led1 = 0;
00233         wait_ms(100);
00234         led4 = 0;
00235         led2 = 0;
00236         wait_ms(100);
00237         led3 = 0;
00238         led4 = 1;
00239         wait_ms(100);
00240     }
00241 }
00242 
00243 int main()
00244 {
00245     if (sdram_init()) {
00246         pc.printf("Failed to initialize SDRAM\n");
00247     }
00248     
00249     /* For debugging, you may find it useful to print memory usage
00250      * stats. AvailableMemory may be flaky, but the following is nice.
00251      * It will get printed to the USB serial port interface. */
00252     //printf("%d: ", __LINE__); __heapstats((__heapprt)fprintf, stdout);
00253 
00254     /* Generate a 800Hz tone using PWM hardware output */
00255     //speaker.period(1.0/800.0); // 800hz period
00256     led_r = led_g = led_b = 1.0; // lights out
00257     led1 = led2 = 1; led3 = led4 = 0;  // lights out
00258 
00259     //lcd.cls();
00260     //lcd.locate(0,0);
00261     
00262     if (!tmp.open()) {
00263         pc.printf("Failed to open LM75 temperature sensor\n");
00264     }
00265 
00266 //    if (!MMA.testConnection())
00267 //        pc.printf("MMA error  \n");
00268 
00269     // Initialize the accelerometer
00270     if (!MMA.setMode(MMA7455::ModeMeasurement)) {
00271         printf("Unable to set mode for MMA7455!\n");
00272     }
00273 
00274     // Calibrate it. It does not matter if it is on a level surface
00275     // as this test is only interested in relative values.
00276     if (!MMA.calibrate()) {
00277         printf("Failed to calibrate MMA7455!\n");
00278     }
00279 
00280     MDMRtos<MDMSerial> mdm;
00281     //mdm.setDebug(4); // enable this for debugging issues 
00282     int i;
00283     for (i = 1; i <= 10; i++) {
00284         if (mdm.connect(SIMPIN, APN,USERNAME,PASSWORD)) {
00285             printf("Connected\n");
00286             mdm.setDebug(0); // disable debug again
00287             break;
00288         } else {
00289             printf("Attempt %2d to connect to the modem FAILED.\n", i);
00290             wait(1);
00291             mdm.setDebug(min(i, 4)); // to add more and more debug output
00292         }
00293     }
00294     if (i > 10) {
00295         printf("Failed to connect to the modem\n");
00296         mbed_die();
00297     }
00298     
00299     forceStatusUpdate = true;
00300     //status_msg(pn);
00301     // lcd.printf("pub... ");
00302 
00303     Thread t_p(publish_thread);
00304     Thread t_s(subscribe_thread);
00305 
00306     while (1) {
00307         Thread::wait(2000);
00308         safe_printf(".\n");
00309     }
00310 
00311     mdm.disconnect();
00312     mdm.powerOff();
00313 }