![](/media/cache/profiles/e1c599867ee5449a59e6c638200a3d92.50x50_q85.jpg)
Door controller and proximity switch detection.
Dependencies: mbed-rtos mbed VodafoneUSBModem_bleedingedge
This program takes in a digital input - which is a reed switch for a door - and an output to a relay. The door is open with a simple 'text' to the modem on the USB bus (i used k3770 vodafone dongle).
The door will send an alarm message to your nominated numbers at the start of the program if the door is open without a command being sent.
Very simple - and just meant as a demonstration of how to incorporate GSM/3G functionality to a evice.
main.cpp
- Committer:
- nherriot
- Date:
- 2013-02-21
- Revision:
- 27:a265d336f088
- Parent:
- 26:b9a0fa0f2469
- Child:
- 29:dc1458c071ba
File content as of revision 27:a265d336f088:
/* net_sms_test.cpp */ /* Copyright (C) 2012 ARM Limited. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #define __DEBUG__ 4 //Maximum verbosity #ifndef __MODULE__ #endif #define MY_PHONE_NUMBER "+447717275049" // Nicholas' Number #define BACKUP_NUMBER "+447825608771" // Ashleys Number #include "mbed.h" #include "rtos.h" #include "VodafoneUSBModem.h" #include <string> extern "C" void HardFault_Handler() { error("Hard Fault!\n"); } DigitalOut led1(LED1); // LED 1 is used to show the state of the door. ON is door open, and OFF is door close. DigitalOut led2(LED2); // LED 2 is used to indicate that the main process is still running. DigitalOut led3(LED3); // LED 3 is use to indicate if the relay is being switched on to open the door DigitalOut led4(LED4); // LED 4 indicate the state of the ALARM - If it's on the door is armed. DigitalOut doorContactorRelay(p5); // create a digital pin object to control the door contactor relay DigitalIn doorProximitySwitch(p6); // create a digital pin object to sense door position proximity switch, this works in reverse // the switch senses positive when the door is closed - need to be sure when it's closed! :-) bool openTheDoor = false; // create a state variable which is set to indicate the mbed should open the door // this variable will be used hold the latch open until it knows the door has been open. bool detectRegState = true; // this boolean variable will force the while loop to detect reg state - if the connection manager // is not registered it will stay in this 'detec' phase for ever. bool alarmActive = false; // this alarm flag will only be true if the door is open - but no signal has been detected // to open the door. in other words there is a break in! bool closeTheDoor = false; // this flag is used when the door is in an open legal state. once it's closed after a legal state // it will set the alarm to active. int read_digital(void) { DigitalIn mydigital(p6); return(mydigital.read()); } // http://mbed.org/forum/mbed/topic/508/ class Watchdog { public: // Load timeout value in watchdog timer and enable void setTimeOut(float s) { LPC_WDT->WDCLKSEL = 0x1; // Set CLK src to PCLK uint32_t clk = SystemCoreClock / 16; // WD has a fixed /4 prescaler, PCLK default is /4 LPC_WDT->WDTC = s * (float)clk; LPC_WDT->WDMOD = 0x3; // Enabled and Reset kick(); } // "kick" or "feed" the dog - reset the watchdog timer // by writing this required bit pattern void kick() { LPC_WDT->WDFEED = 0xAA; LPC_WDT->WDFEED = 0x55; } }; // Setup the watchdog timer Watchdog watchDogTimer; void doorController(void const*) { DBG("Hello world and Vodafone Connection Manager test program!"); DBG("Waiting 30 seconds for modem to settle down"); Thread::wait(10000); VodafoneUSBModem connectionManager; // create a connection manager object char num[17]; // create a buffer to hold the telephone number in char msg[160]; // create a buffer to hold the text message in size_t count; LinkMonitor::REGISTRATION_STATE regState = LinkMonitor::REGISTRATION_STATE_UNKNOWN; // an enum to hold the registration state of the connection manager LinkMonitor::BEARER bearer = LinkMonitor::BEARER_UNKNOWN; // an enum to hold the type of bearer established by the connection manager int rssi = -1000; // a signal strength indicator variable - set to a very default low value. // this is a fudge to let the modem settle down - we wait for 30 seconds DBG("Wait over - initialising the modem manager"); int ret = connectionManager.getLinkState(&rssi, ®State, &bearer); // LinkMonitor::REGISTRATION_STATE regState = LinkMonitor::REGISTRATION_STATE_HOME_NETWORK; // before we do anything we need to make sure we have a connection to a network. // so let us check that first! while(detectRegState) { if (detectRegState ==1) { if(rssi==-1000) { DBG("Checking signal strength - RSSI: Error."); } else { DBG("Signal strength is: RSSI: %d",rssi); } switch(regState) { case LinkMonitor::REGISTRATION_STATE_UNKNOWN: DBG("regState: UNKNOWN. Failing."); break; case LinkMonitor::REGISTRATION_STATE_REGISTERING: DBG("regState: REGISTERING"); break; case LinkMonitor::REGISTRATION_STATE_DENIED: DBG("regState: DENIED"); break; case LinkMonitor::REGISTRATION_STATE_NO_SIGNAL: DBG("regState: NO SIGNAL"); break; case HARDWARE_NO_RESPONSE: DBG("Looks like there is no modem inserted, or power to the modem module has failed?"); break; case LinkMonitor::REGISTRATION_STATE_HOME_NETWORK: detectRegState = false; DBG("regState: HOME NETWORK"); break; case LinkMonitor::REGISTRATION_STATE_ROAMING: detectRegState = false; DBG("regState: ROAMING"); break; default: DBG("regState: ERROR. Failing."); } } Thread::wait(500); int ret = connectionManager.getLinkState(&rssi, ®State, &bearer); } // let the boss man know I'm alive and entering my main loop ret = connectionManager.sendSM(MY_PHONE_NUMBER, "Hello from Vodafone door controller 2013 - Alarm Active"); ret = connectionManager.sendSM(BACKUP_NUMBER, "Hello from Vodafone door controller 2013- Alarm Active"); // better let the boss know that I'm on a roamed network as this could cost some money! or present some routing problems if (regState==LinkMonitor::REGISTRATION_STATE_ROAMING) { //ret = connectionManager.sendSM(MY_PHONE_NUMBER, "Warning sir - I'm on a roamed network!"); ret = connectionManager.sendSM(BACKUP_NUMBER, "Warning sir - I'm on a roamed network!"); } while(true) { // if this state variable has been set I need to keep the doorContactor on until the door is open if ((openTheDoor) && (read_digital() == 0)) { DBG("The door is open now and I'm switching off the relay and reseting the state variable"); doorContactorRelay = 0; // door must be open now so switch relay off. openTheDoor = false; // the door is open now so set it to false. led3 = 0; // switch the LED light off to indicate I'm switching the relay off closeTheDoor = true; // now set the flag to indicate we are waiting for a closed door event allowing us to then activate the alarm DBG("The closeTheDoor is now set to TRUE"); } if ((read_digital() != 0) && ( closeTheDoor == true)) { closeTheDoor = false; // the door is now closed after a legal open so reset the flag alarmActive = true; // OK we can now activate the ALARM again led4 = 1; // switch the alarm light on DBG("The door is now closed after an open and the ALARM is no re-activated"); } // check to see if the door is open and the alarm is on - if it is send warning message - but just once!!!! if ((read_digital() == 0) && (alarmActive == true)) { DBG("The door is now open - but the ALARM is active - send emergency text to warn our boss!"); DBG("*******************************************************************"); DBG("WARNING - WARNING - WARNING - WARNING - WARNING - WARNING - WARNING"); DBG("*******************************************************************"); alarmActive = false; // set the alarm off as we don't want to keep sending text messages led4 = 0; // set the alarm light to off connectionManager.sendSM(BACKUP_NUMBER, "ALARM - ALARM - ALARM - Your door is open but I've not received an 'open' command!!!" ); connectionManager.sendSM(MY_PHONE_NUMBER, "ALARM - ALARM - ALARM - Your door is open but I've not received an 'open' command!!!" ); } // check to see that the door is closed and the alarm can be reset. this will happen if the openTheDoor state variable // is FALSE (indicating that the system is not trying to hold the relay open to allow accesss, the door is closed and the ALARM is false if ((openTheDoor == false) && (read_digital() !=0) && (alarmActive == false)) { DBG("Resetting the ALARM to active again"); alarmActive = true; // set the alarm on as the door is closed again led4 = 1; } // check the state of the door and switch the LED light to 'ON' for door open and 'OFF' for door closed. //if (doorProximitySwitch.read() == 0) if (read_digital() == 0) { // DBG("The door proximity switch is: %d so I think it's open", doorProximitySwitch.read() ); led1 = 1; } else { // DBG("The door proximity switch is: %d so I think it's closed", doorProximitySwitch.read() ); led1 = 0; } int ret = connectionManager.getSMCount(&count); // check to see if there is an incoming SMS message if(ret) { WARN("getSMCount returned %d", ret); Thread::wait(125); continue; } // DBG("The SMS count is now at: %d for this modem", count); if( count > 0) // if there are messages in the mailbox start pulling them off the queue { DBG("%d SMS to read", count); ret = connectionManager.getSM(num, msg, 160); if(ret) { WARN("getSM returned %d", ret); Thread::wait(125); continue; } DBG("The message is from number: %s and the message is: \"%s\"", num, msg); // if the SMS is from your own number, ignore it! if(strcmp(num,"+447785666088")==0) { DBG("The message appears to be from my MSISDN number: %s, I'll do nothing.", num); continue; } if ((strcmp (msg, "open") ==0)|| (strcmp(num,"TrackaPhone")==0)) { DBG("The SMS message indicates I should open the door"); // check the door is not already open if it is do nothing and send a warning back to the sender // for this door the switch 'true' then its closed - we have to have an active signal to show it's securely closed if (read_digital() == 0 ) { DBG("The door is already open - so I'll do nothing"); connectionManager.sendSM(num, " WARNING - The door is already open sir! "); } else { doorContactorRelay = 1; openTheDoor = true; // set the state vairable to let the door contoller know it needs to open the door alarmActive = false; // set the alarm OFF until the door is open led4 = 0; // set the alarm light to off DBG("The ALARM is now set to %d: ", alarmActive); led3 = 1; DBG("The relay has been activated to open the door"); connectionManager.sendSM(num, " Door open sir... Welcome home! " ); } } else { DBG("The SMS message is not recognized"); connectionManager.sendSM(num, " Wrong password sir... Try 'open' and I'll open! ;-) "); } } Thread::wait(500); DBG("Main loop. Make sure we kick the dog to stop a restart happening!"); watchDogTimer.kick(); } } void keepAlive(void const*) { while(1) { led2=!led2; Thread::wait(500); } } int main() { // On reset, indicate a watchdog reset has happened by switching all lights on for 3 seconds if ((LPC_WDT->WDMOD >> 2) & 1) { led1 = 1; led2 = 1; led3 = 1; led4 = 1; Thread::wait(3000); led1 = 0; led2 = 0; led3 = 0; led4 = 0; } // setup a 30 second timeout on watchdog timer hardware // needs to be longer than worst case main loop exection time watchDogTimer.setTimeOut(30.0); DBG_INIT(); DBG_SET_SPEED(115200); doorController(NULL); //Thread testTask(test, NULL, osPriorityNormal, 1024*5); keepAlive(NULL); return 0; }