Pubnub demo for AT&T IoT Starter Kit. Functionally similar to the Flow demo.
Dependencies: FXOS8700CQ MODSERIAL mbed
Pubnub demo for AT&T IoT Starter Kit
This demo is functionally similar to the Flow demo, so you can find general information here: https://developer.mbed.org/users/JMF/code/Avnet_ATT_Cellular_IOT/.
The only difference is that we use Pubnub to publish the measurements and subscribe to receiving the instructions to set the LED.
Settings
Pubnub related settings are:
Pubnub settings in `config_me.h`
PUBNUB_SUBSCRIBE_KEY PUBNUB_PUBLISH_KEY PUBNUB_CHANNEL
All are documented in their respective comments.
Pubnub context class
Similar to Pubnub SDKs, we provide a Pubnub context class. It is defined in pubnub.h
header file and implemented in pubnub.cpp
.
It provides only the fundamental "publish" and "subscribe" methods. They are documented in the header file.
This class is reusable in other code (it is not specific to this demo), it has a very narrow interface to the AT&T IoT cellular modem code. For example of use, you can look at the main()
(in main.c
).
Sample of published data
Published message w/measurement data
{"serial":"vstarterkit001","temp":89.61,"humidity":35,"accelX":0.97,"accelY":0.013,"accelZ":-0.038}
Don't worry, nobody got burnt, the temperature is in degrees Fahrenheit. :)
Publish a message (from, say, the Pubnub console http://pubnub.com/console) of the form {"LED":<name-of-the-color>}
on the channel that this demo listens to (default is hello_world
) to turn the LED to that color on the Starter Kit:
Turn LED to red
{"LED":"Red"}
Turn LED to green
{"LED":"Green"}
Turn LED to blue
{"LED":"Blue"}
main.cpp
- Committer:
- stefanrousseau
- Date:
- 2016-07-13
- Revision:
- 16:17c5916f2d12
- Parent:
- 14:0c353e212296
- Child:
- 17:38a8cc0c6ba5
File content as of revision 16:17c5916f2d12:
#include "mbed.h" #include <cctype> #include <string> #include "SerialBuffered.h" #include "HTS221.h" #include "config_me.h" #include "wnc_control.h" #include "sensors.h" #include "hardware.h" I2C i2c(PTC11, PTC10); //SDA, SCL -- define the I2C pins being used // comment out the following line if color is not supported on the terminal #define USE_COLOR #ifdef USE_COLOR #define BLK "\033[30m" #define RED "\033[31m" #define GRN "\033[32m" #define YEL "\033[33m" #define BLU "\033[34m" #define MAG "\033[35m" #define CYN "\033[36m" #define WHT "\033[37m" #define DEF "\033[39m" #else #define BLK #define RED #define GRN #define YEL #define BLU #define MAG #define CYN #define WHT #define DEF #endif #define MDM_DBG_OFF 0 #define MDM_DBG_AT_CMDS (1 << 0) int mdm_dbgmask = MDM_DBG_OFF; Serial pc(USBTX, USBRX); SerialBuffered mdm(PTD3, PTD2, 128); DigitalOut led_green(LED_GREEN); DigitalOut led_red(LED_RED); DigitalOut led_blue(LED_BLUE); DigitalOut mdm_uart2_rx_boot_mode_sel(PTC17); // on powerup, 0 = boot mode, 1 = normal boot DigitalOut mdm_power_on(PTB9); // 0 = turn modem on, 1 = turn modem off (should be held high for >5 seconds to cycle modem) DigitalOut mdm_wakeup_in(PTC2); // 0 = let modem sleep, 1 = keep modem awake -- Note: pulled high on shield DigitalOut mdm_reset(PTC12); // active high DigitalOut shield_3v3_1v8_sig_trans_ena(PTC4); // 0 = disabled (all signals high impedence, 1 = translation active DigitalOut mdm_uart1_cts(PTD0); #define TOUPPER(a) (a) //toupper(a) const char ok_str[] = "OK"; const char error_str[] = "ERROR"; #define MDM_OK 0 #define MDM_ERR_TIMEOUT -1 #define MAX_AT_RSP_LEN 255 ssize_t mdm_getline(char *buff, size_t size, int timeout_ms) { int cin = -1; int cin_last; if (NULL == buff || size == 0) { return -1; } size_t len = 0; Timer timer; timer.start(); while ((len < (size-1)) && (timer.read_ms() < timeout_ms)) { if (mdm.readable()) { cin_last = cin; cin = mdm.getc(); if (isprint(cin)) { buff[len++] = (char)cin; continue; } else if (('\r' == cin_last) && ('\n' == cin)) { break; } } wait_ms(1); } buff[len] = (char)NULL; return len; } int mdm_sendAtCmd(const char *cmd, const char **rsp_list, int timeout_ms) { if (cmd && strlen(cmd) > 0) { if (mdm_dbgmask & MDM_DBG_AT_CMDS) { printf(MAG "ATCMD: " DEF "--> " GRN "%s" DEF "\n", cmd); } mdm.printf("%s\r\n", cmd); } if (rsp_list) { Timer timer; char rsp[MAX_AT_RSP_LEN+1]; int len; timer.start(); while (timer.read_ms() < timeout_ms) { len = mdm_getline(rsp, sizeof(rsp), timeout_ms - timer.read_ms()); if (len < 0) return MDM_ERR_TIMEOUT; if (len == 0) continue; if (mdm_dbgmask & MDM_DBG_AT_CMDS) { printf(MAG "ATRSP: " DEF "<-- " CYN "%s" DEF "\n", rsp); } if (rsp_list) { int rsp_idx = 0; while (rsp_list[rsp_idx]) { if (strcasecmp(rsp, rsp_list[rsp_idx]) == 0) { return rsp_idx; } rsp_idx++; } } } return MDM_ERR_TIMEOUT; } return MDM_OK; } int mdm_init(void) { // disable signal level translator (necessary // for the modem to boot properly) shield_3v3_1v8_sig_trans_ena = 0; // Hard reset the modem (doesn't go through // the signal level translator) mdm_reset = 1; // wait a moment for the modem to react wait_ms(10); // Let modem boot mdm_reset = 0; // wait a moment for the modem to react wait(1.0); // power modem on //off mdm_power_on = 0; //1; // insure modem boots into normal operating mode // and does not go to sleep when powered on mdm_uart2_rx_boot_mode_sel = 1; mdm_wakeup_in = 1; // initialze comm with the modem mdm.baud(115200); // clear out potential garbage while (mdm.readable()) mdm.getc(); mdm_uart1_cts = 0; // wait a moment for the modem to react to signal // conditions while the level translator is disabled // (sorry, don't have enough information to know // what exactly the modem is doing with the current // pin settings) wait(1.0); // enable the signal level translator to start // modem reset process (modem will be powered down) shield_3v3_1v8_sig_trans_ena = 1; // Give the modem 60 secons to start responding by // sending simple 'AT' commands to modem once per second. Timer timer; timer.start(); while (timer.read() < 60) { const char * rsp_lst[] = { ok_str, error_str, NULL }; int rc = mdm_sendAtCmd("AT", rsp_lst, 500); if (rc == 0) return true; //timer.read(); wait_ms(1000 - (timer.read_ms() % 1000)); pc.printf("\r%d",timer.read_ms()/1000); } return false; } int mdm_sendAtCmdRsp(const char *cmd, const char **rsp_list, int timeout_ms, string * rsp, int * len) { static char cmd_buf[3200]; // Need enough room for the WNC sockreads (over 3000 chars) size_t n = strlen(cmd); if (cmd && n > 0) { if (mdm_dbgmask & MDM_DBG_AT_CMDS) { printf(MAG "ATCMD: " DEF "--> " GRN "%s" DEF "\n", cmd); } while (n--) { mdm.putc(*cmd++); wait_ms(1); }; mdm.putc('\r'); wait_ms(1); mdm.putc('\n'); wait_ms(1); } if (rsp_list) { rsp->erase(); // Clean up from prior cmd response *len = 0; Timer timer; timer.start(); while (timer.read_ms() < timeout_ms) { int lenCmd = mdm_getline(cmd_buf, sizeof(cmd_buf), timeout_ms - timer.read_ms()); if (lenCmd == 0) continue; if (lenCmd < 0) return MDM_ERR_TIMEOUT; else { *len += lenCmd; *rsp += cmd_buf; } if (mdm_dbgmask & MDM_DBG_AT_CMDS) { printf(MAG "ATRSP: " DEF "<-- " CYN "%s" DEF "\n", cmd_buf); } int rsp_idx = 0; while (rsp_list[rsp_idx]) { if (strcasecmp(cmd_buf, rsp_list[rsp_idx]) == 0) { return rsp_idx; } rsp_idx++; } } return MDM_ERR_TIMEOUT; } pc.printf("D %s",rsp); return MDM_OK; } void reinitialize_mdm(void) { // Initialize the modem printf(GRN "Modem RE-initializing..." DEF "\r\n"); if (!mdm_init()) { printf(RED "\n\rModem RE-initialization failed!" DEF "\n"); } printf("\r\n"); } // These are built on the fly string MyServerIpAddress; string MySocketData; // These are to be built on the fly string my_temp; string my_humidity; #define CTOF(x) ((x)*1.8+32) //******************************************************************************************************************************************** //* Create string with sensor readings that can be sent to flow as an HTTP get //******************************************************************************************************************************************** K64F_Sensors_t SENSOR_DATA = { .Temperature = "0", .Humidity = "0", .AccelX = "0", .AccelY = "0", .AccelZ = "0", .MagnetometerX = "0", .MagnetometerY = "0", .MagnetometerZ = "0", .AmbientLightVis = "0", .AmbientLightIr = "0", .UVindex = "0", .Proximity = "0", .Temperature_Si7020 = "0", .Humidity_Si7020 = "0" }; void GenerateModemString(char * modem_string) { switch(iSensorsToReport) { case TEMP_HUMIDITY_ONLY: { sprintf(modem_string, "GET %s%s?serial=%s&temp=%s&humidity=%s %s%s\r\n\r\n", FLOW_BASE_URL, FLOW_INPUT_NAME, FLOW_DEVICE_NAME, SENSOR_DATA.Temperature, SENSOR_DATA.Humidity, FLOW_URL_TYPE, MY_SERVER_URL); break; } case TEMP_HUMIDITY_ACCELEROMETER: { sprintf(modem_string, "GET %s%s?serial=%s&temp=%s&humidity=%s&accelX=%s&accelY=%s&accelZ=%s %s%s\r\n\r\n", FLOW_BASE_URL, FLOW_INPUT_NAME, FLOW_DEVICE_NAME, SENSOR_DATA.Temperature, SENSOR_DATA.Humidity, SENSOR_DATA.AccelX,SENSOR_DATA.AccelY,SENSOR_DATA.AccelZ, FLOW_URL_TYPE, MY_SERVER_URL); break; } case TEMP_HUMIDITY_ACCELEROMETER_PMODSENSORS: { sprintf(modem_string, "GET %s%s?serial=%s&temp=%s&humidity=%s&accelX=%s&accelY=%s&accelZ=%s&proximity=%s&light_uv=%s&light_vis=%s&light_ir=%s %s%s\r\n\r\n", FLOW_BASE_URL, FLOW_INPUT_NAME, FLOW_DEVICE_NAME, SENSOR_DATA.Temperature, SENSOR_DATA.Humidity, SENSOR_DATA.AccelX,SENSOR_DATA.AccelY,SENSOR_DATA.AccelZ, SENSOR_DATA.Proximity, SENSOR_DATA.UVindex, SENSOR_DATA.AmbientLightVis, SENSOR_DATA.AmbientLightIr, FLOW_URL_TYPE, MY_SERVER_URL); break; } default: { sprintf(modem_string, "Invalid sensor selected\r\n\r\n"); break; } } //switch(iSensorsToReport) } //GenerateModemString //Periodic timer Ticker OneMsTicker; volatile bool bTimerExpiredFlag = false; int OneMsTicks = 0; int iTimer1Interval_ms = 1000; //******************************************************************************************************************************************** //* Periodic 1ms timer tick //******************************************************************************************************************************************** void OneMsFunction() { OneMsTicks++; if ((OneMsTicks % iTimer1Interval_ms) == 0) { bTimerExpiredFlag = true; } } //OneMsFunction() //******************************************************************************************************************************************** //* Set the RGB LED's Color //* LED Color 0=Off to 7=White. 3 bits represent BGR (bit0=Red, bit1=Green, bit2=Blue) //******************************************************************************************************************************************** void SetLedColor(unsigned char ucColor) { //Note that when an LED is on, you write a 0 to it: led_red = !(ucColor & 0x1); //bit 0 led_green = !(ucColor & 0x2); //bit 1 led_blue = !(ucColor & 0x4); //bit 2 } //SetLedColor() //******************************************************************************************************************************************** //* Process JSON response messages //******************************************************************************************************************************************** bool extract_JSON(char* search_field, char* found_string) { char* beginquote; char* endquote; beginquote = strchr(search_field, '{'); //start of JSON endquote = strchr(search_field, '}'); //end of JSON if (beginquote != 0) { uint16_t ifoundlen; if (endquote != 0) { ifoundlen = (uint16_t) (endquote - beginquote) + 1; strncpy(found_string, beginquote, ifoundlen ); found_string[ifoundlen] = 0; //null terminate return true; } else { endquote = strchr(search_field, '\0'); //end of string... sometimes the end bracket is missing ifoundlen = (uint16_t) (endquote - beginquote) + 1; strncpy(found_string, beginquote, ifoundlen ); found_string[ifoundlen] = 0; //null terminate return false; } } else { return false; } } //extract_JSON bool parse_JSON(char* json_string) { char* beginquote; char token[] = "\"LED\":\""; beginquote = strstr(json_string, token ); if ((beginquote != 0)) { char cLedColor = beginquote[strlen(token)]; printf(GRN "LED Found : %c" DEF "\r\n", cLedColor); switch(cLedColor) { case 'O': { //Off SetLedColor(0); break; } case 'R': { //Red SetLedColor(1); break; } case 'G': { //Green SetLedColor(2); break; } case 'Y': { //Yellow SetLedColor(3); break; } case 'B': { //Blue SetLedColor(4); break; } case 'M': { //Magenta SetLedColor(5); break; } case 'T': { //Turquoise SetLedColor(6); break; } case 'W': { //White SetLedColor(7); break; } default: { break; } } //switch(cLedColor) return true; } else { return false; } } //parse_JSON int main() { int i; HTS221 hts221; pc.baud(115200); void hts221_init(void); pc.printf(BLU "Hello World from AT&T Shape!\r\n\n\r"); pc.printf(GRN "Initialize the HTS221\n\r"); i = hts221.begin(); if( i ) pc.printf(BLU "HTS221 Detected! (0x%02X)\n\r",i); else pc.printf(RED "HTS221 NOT DETECTED!!\n\r"); printf("Temp is: %0.2f F \n\r",CTOF(hts221.readTemperature())); printf("Humid is: %02d %%\n\r",hts221.readHumidity()); SetLedColor(0); //Off sensors_init(); read_sensors(); // Initialize the modem printf(GRN "Modem initializing... will take up to 60 seconds" DEF "\r\n"); do { i=mdm_init(); if (!i) { pc.printf(RED "Modem initialization failed!" DEF "\n"); } } while (!i); //Software init software_init_mdm(); // Resolve URL to IP address to connect to resolve_mdm(); //Create a 1ms timer tick function: OneMsTicker.attach(OneMsFunction, 0.001f) ; iTimer1Interval_ms = 5000; //5 seconds // Send and receive data perpetually while(1) { if (bTimerExpiredFlag) { bTimerExpiredFlag = false; sprintf(SENSOR_DATA.Temperature, "%0.2f", CTOF(hts221.readTemperature())); sprintf(SENSOR_DATA.Humidity, "%02d", hts221.readHumidity()); read_sensors(); //read available external sensors from a PMOD and the on-board motion sensor sockopen_mdm(); char modem_string[512]; GenerateModemString(&modem_string[0]); printf(BLU "Sending to modem : %s" DEF "\n", modem_string); sockwrite_mdm(modem_string); sockread_mdm(&MySocketData, 1024, 20); printf(BLU "Read back : %s" DEF "\n", &MySocketData[0]); char * myJsonResponse; if (extract_JSON(&MySocketData[0], &myJsonResponse[0])) { printf(GRN "JSON : %s" DEF "\n", &myJsonResponse[0]); parse_JSON(&myJsonResponse[0]); } else { printf(RED "JSON : %s" DEF "\n", &myJsonResponse[0]); //most likely an incomplete JSON string parse_JSON(&myJsonResponse[0]); //This is risky, as the string may be corrupted } sockclose_mdm(); } //bTimerExpiredFlag } //forever loop #if (0) string * pStr; while (1) { send_wnc_cmd("AT", &pStr, WNC_TIMEOUT_MS); } #endif }