Srdjan Veljkovic
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"}
Diff: main.cpp
- Revision:
- 2:0e2ef866af95
- Parent:
- 1:af7a42f7d465
- Child:
- 3:26b3cc155f39
diff -r af7a42f7d465 -r 0e2ef866af95 main.cpp
--- a/main.cpp Sat Jul 09 00:45:53 2016 +0000
+++ b/main.cpp Sun Jul 10 00:52:49 2016 +0000
@@ -3,6 +3,9 @@
#include <string>
#include "SerialBuffered.h"
#include "HTS221.h"
+#include "config_me.h"
+#include "wnc_control.h"
+
// comment out the following line if color is not supported on the terminal
#define USE_COLOR
@@ -54,56 +57,6 @@
#define MAX_AT_RSP_LEN 255
-//
-// The modem will return strings of HEX encoded data. This function takes
-// a pointer to a string of HEX ASCII data and converts it into a string
-// of ASCII data. It takes a pointer to the string of HEX ASCII data and
-// a pointer to the destination string. It returns the number of characters
-// it converted.
-//
-int DecodeASCIIstr(string& ins, string& outs) {
- int val, n = 0;
- char ts[] = {0,0,0};
-
- while(n<ins.length()) {
- ts[0] = ins[n];
- ts[1] = ins[n+1];
- sscanf(ts,"%X",&val);
- sprintf(ts,"%c",val);
- outs.append(ts);
- n += 2;
- }
- return outs.length();
-}
-
-
-//
-// Modem expects data to be passed to it in the form of HEX encoded strings. This
-// function takes a pointer to a users supplied ASCII string, and converts it into
-// an ASCII string of equivelent HEX numbers encoded as a string. The function takes
-// a pointer to the users input string, and a pointer to the output string. The
-// function returns the number of characters converted or 0 if an error occurs or more
-// than 750 characters were converted. The 750 chacter limit is because the modem
-// will only accept up to 1500 characters, and the converted srings will be 2x the
-// input string since the hex representation of 1 character is a two digit hex value.
-//
-int CreateASCIIstr(string& ins, string& outs) {
- int i = 0;
- char ts[3];
-
- if( ins.length() > 749 )
- return 0;
-
- while(ins[i] != 0x00) {
- sprintf(ts,"%02X", ins[i]);
- outs.append(ts);
- i++;
- }
- return outs.length();
-}
-
-
-
ssize_t mdm_getline(char *buff, size_t size, int timeout_ms) {
int cin = -1;
int cin_last;
@@ -128,7 +81,7 @@
}
wait_ms(1);
}
- buff[len] = NULL;
+ buff[len] = (char)NULL;
return len;
}
@@ -189,6 +142,10 @@
// initialze comm with the modem
mdm.baud(115200);
+ // clear out potential garbage
+ while (mdm.readable())
+ mdm.getc();
+
mdm_uart1_cts = 0;
// enable the signal level translator to start
@@ -210,15 +167,76 @@
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)
+
+ 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) {
+ 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)
int main() {
+ int i;
HTS221 hts221;
pc.baud(115200);
- int i,
- CreateASCIIstr(string& in, string& out),
- DecodeASCIIstr(string& ins, string& outs);
- string ins, outs;
void hts221_init(void);
@@ -233,15 +251,6 @@
printf("Temp is: %0.2f F \n\r",CTOF(hts221.readTemperature()));
printf("Humid is: %02d %%\n\r",hts221.readHumidity());
-
- string newstr, outstr, instr = "0123456789aAbBcCdDeEfFxXyYzZ";
- pc.printf("\n\rTest ASCII String creation: \n\r");
- i = CreateASCIIstr(instr,outstr);
- pc.printf(">Initially the string is '%s' (%d long)\n\r>after encode it is '%s' (%d characters long).\n\r",
- instr.c_str(),instr.length(),outstr.c_str(),i);
- i = DecodeASCIIstr(outstr, newstr);
- pc.printf(">after decoding the encoded string, it is '%s' (%d long)\n\r\n\r",newstr.c_str(),i);
-
// Initialize the modem
printf(GRN "Modem initializing... will take up to 60 seconds" DEF "\r\n");
@@ -251,34 +260,23 @@
while (1);
}
- // Now that the modem is up and running, transfer characters
- // between the pc terminal and the modem to give the user
- // a virtual terminal to the modem.
- pc.printf(YEL "\rAT command interface ready, completed in %d seconds. You may now type AT commands" DEF "\r\n",i);
-
- while(1) {
- if(pc.readable()) {
- char char_in = TOUPPER(pc.getc());
-
- static char last_char_in = 0;
+ //Software init
+ software_init_mdm();
+
+ // Resolve URL to IP address to connect to
+ resolve_mdm();
- if (('\r' == char_in) || ('\n' == char_in))
- {
- if (('\r' == char_in) || ('\r' != last_char_in))
- {
- mdm.puts("\r\n");
- }
- }
- else
- {
- pc.putc(char_in);
- mdm.putc(char_in);
- }
- last_char_in = char_in;
- }
- if(mdm.readable()) {
- char ser_char = mdm.getc();
- pc.putc(ser_char);
- }
+ // Send and receive data perpetually
+ while(1) {
+ sockopen_mdm();
+ sockwrite_mdm("GET /f653d97537235/a31c2684a02c/d35e42196968fd6/in/flow/climate?deviceID=e5ee19804bd500c8fe69a809342384c2&temp=41.0&humidity=87.33 HTTP/1.1 Host: run-east.att.io:80 Accept: */*\r\n\r\n");
+ sockread_mdm(&MySocketData, 1024, 20);
+ sockclose_mdm();
+ }
+
+ string * pStr;
+ while (1)
+ {
+ send_wnc_cmd("AT", &pStr, WNC_TIMEOUT_MS);
}
}