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: wnc_control.cpp
- Revision:
- 43:6821a9c78c4b
- Parent:
- 42:be4b9ee3a615
- Child:
- 44:c95a85b5cf92
diff -r be4b9ee3a615 -r 6821a9c78c4b wnc_control.cpp --- a/wnc_control.cpp Sun Jul 24 03:10:21 2016 +0000 +++ b/wnc_control.cpp Sun Jul 24 16:58:17 2016 +0000 @@ -221,43 +221,47 @@ int check_wnc_ready(void) { - string * pRespStr; - size_t pos; - int regSts; + string * pRespStr; + size_t pos; + int regSts; - pc.puts("<-------- Begin Cell Status ------------\r\n"); + pc.puts("<-------- Begin Cell Status ------------\r\n"); - at_send_wnc_cmd("AT+CSQ", &pRespStr, WNC_TIMEOUT_MS); // Check RSSI,BER - at_send_wnc_cmd("AT+CPIN?", &pRespStr, WNC_TIMEOUT_MS); // Check if SIM locked + at_send_wnc_cmd("AT+CSQ", &pRespStr, WNC_TIMEOUT_MS); // Check RSSI,BER + at_send_wnc_cmd("AT+CPIN?", &pRespStr, WNC_TIMEOUT_MS); // Check if SIM locked - // If SIM Card not ready don't bother with commands! - if (pRespStr->find("CPIN: READY") == string::npos) - { - pc.puts("------------ WNC SIM Problem! --------->\r\n"); - return (-1); - } + if (WNC_MDM_ERR == WNC_NO_RESPONSE) + { + pc.puts("------------ WNC No Response! --------->\r\n"); + return (-2); + } - // SIM card OK, now check for signal and cellular network registration -// do -// { + // If SIM Card not ready don't bother with commands! + if (pRespStr->find("CPIN: READY") == string::npos) + { + pc.puts("------------ WNC SIM Problem! --------->\r\n"); + return (-1); + } + + // SIM card OK, now check for signal and cellular network registration at_send_wnc_cmd("AT+CREG?", &pRespStr, WNC_TIMEOUT_MS); // Check if registered on network pos = pRespStr->find("CREG: "); if (pos != string::npos) { - // The registration is the 2nd arg in the comma separated list - *pRespStr = pRespStr->substr(pos+8, 1); - regSts = atoi(pRespStr->c_str()); - // 1 - registered home, 5 - registered roaming - if ((regSts != 1) && (regSts != 5)) - { - pc.puts("------------ WNC Cell Link Down! ------>\r\n"); - return (-2); - } + // The registration is the 2nd arg in the comma separated list + *pRespStr = pRespStr->substr(pos+8, 1); + regSts = atoi(pRespStr->c_str()); + // 1 - registered home, 5 - registered roaming + if ((regSts != 1) && (regSts != 5)) + { + pc.puts("------------ WNC Cell Link Down! ------>\r\n"); + return (-2); + } } -// } while ((regSts != 1) && (regSts !=5)); - pc.puts("------------ WNC Ready ---------------->\r\n"); + + pc.puts("------------ WNC Ready ---------------->\r\n"); - return (0); + return (0); } // Sets a global with failure or success, assumes 1 thread all the time @@ -338,15 +342,23 @@ if (hardReset == true) { + pc.puts("Hard Reset!\r\n"); pdnSet = false; intSet = false; sockDialSet = false; } + WNC_MDM_ERR = WNC_OK; // Below commands will re-establish error state pc.puts("Start AT init of WNC:\r\n"); - send_wnc_cmd("AT", &pRespStr, WNC_TIMEOUT_MS); // Heartbeat? - send_wnc_cmd("ATE0", &pRespStr, WNC_TIMEOUT_MS); // Echo Off - send_wnc_cmd("AT+CMEE=2", &pRespStr, WNC_TIMEOUT_MS); // 2 - verbose error, 1 - numeric error, 0 - just ERROR + // Quick commands below do not need to check cellular connectivity + at_send_wnc_cmd("AT", &pRespStr, WNC_TIMEOUT_MS); // Heartbeat? + at_send_wnc_cmd("ATE0", &pRespStr, WNC_TIMEOUT_MS); // Echo Off + at_send_wnc_cmd("AT+CMEE=2", &pRespStr, WNC_TIMEOUT_MS); // 2 - verbose error, 1 - numeric error, 0 - just ERROR + + // If the simple commands are not working no chance of more complex. + // I have seen re-trying commands make it worse. + if (WNC_MDM_ERR != WNC_OK) + return ; if ((WNC_MDM_ERR == WNC_OK) && (intSet == false)) send_wnc_cmd("AT@INTERNET=1", &pRespStr, WNC_TIMEOUT_MS); @@ -402,16 +414,13 @@ { string * pRespStr; string str(s); - str = "AT@DNSRESVDON=\"" + str; - str += "\"\r\n"; + str = "AT@DNSRESVDON=\"" + str + "\""; if (send_wnc_cmd(str.c_str(), &pRespStr, WNC_TIMEOUT_MS) == 0) { size_t pos_start = pRespStr->find(":\"") + 2; - if (pos_start != string::npos) + size_t pos_end = pRespStr->rfind("\"") - 1; + if ((pos_start != string::npos) && (pos_end != string::npos)) { - size_t pos_end = pRespStr->rfind("\"") - 1; - if (pos_end != string::npos) - { if (pos_end > pos_start) { // Make a copy for use later (the source string is re-used) @@ -420,9 +429,6 @@ } else pc.puts("URL Resolve fail, substr Err\r\n"); - } - else - pc.puts("URL Resolve fail, no 2nd quote\r\n"); } else pc.puts("URL Resolve fail, no quotes\r\n"); @@ -430,6 +436,8 @@ else pc.puts("URL Resolve fail, WNC cmd fail\r\n"); + *ipStr = "192.168.0.1"; + return -1; } @@ -484,9 +492,16 @@ wait_ms(10); send_wnc_cmd(cmd_str.c_str(), &pRespStr, WNC_TIMEOUT_MS); + size_t pos_start = pRespStr->find("\"") + 1; size_t pos_end = pRespStr->rfind("\"") - 1; - i = (pos_end - pos_start + 1); // Num hex chars, 2 per byte + + // Make sure search finds what it's looking for! + if (pos_start != string::npos && pos_end != string::npos) + i = (pos_end - pos_start + 1); // Num hex chars, 2 per byte + else + i = 0; + if (i > 0) { retries = 1; // If any data found retry 1 more time to catch data that might be in another @@ -501,10 +516,9 @@ numBytes += i/2; } } - return numBytes; } else pc.puts("sockread Err, to many to read\r\n"); - return 0; + return (numBytes); }