Revision 1:16fdeb024e42, committed 2020-05-09

Comitter:

toanatron

Date:

Sat May 09 20:09:37 2020 +0000

Parent:

0:c9d0008613d6

Commit message:

update;

Changed in this revision

diff -r c9d0008613d6 -r 16fdeb024e42 BufferedSerial.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/BufferedSerial.lib	Sat May 09 20:09:37 2020 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/sam_grove/code/BufferedSerial/#7e5e866edd3d

diff -r c9d0008613d6 -r 16fdeb024e42 GSMProgramAutomation.cpp
--- a/GSMProgramAutomation.cpp	Sat Feb 01 17:53:46 2020 +0000
+++ b/GSMProgramAutomation.cpp	Sat May 09 20:09:37 2020 +0000
@@ -1,65 +1,166 @@
 #include "mbed.h"
+#include <iostream>
+#include <string.h>
+#include <stdio.h>
+#include <sstream>
+#include <vector>
+#include "BufferedSerial.h"
 
 #define CTRL_Z      26      //Attach at the end of this message string
+Timer mytime;
 
-Serial pc(USBTX, USBRX);
-Serial SIM800L(P3_1, P3_0);
-DigitalOut led1(LED1);
-
-char phone[14] = "\"17039739276\"";
-char buf[40];
-char buf1[40];
+DigitalOut led1(P4_4);
+DigitalOut rescueLED(P4_4);                     // Offboard GREEN LED
 
 long GSMBAUD = 9600;
-long PCBAUD  = 9600;
+
+/* 
+ * Function: read_message
+ * ------------------------------------------------------------------------------------------------------
+ * Decipher any message inside the SIM800L buffer (UART2) to see what is sent back after sending commands
+ * Typical response are "OK" "ERROR" ">" and "$RECEIVED"
+ * "$RECEIVED" is an automated response sent from TWILIO server
+ * Each SIM800L command depends on a special response before continuing to the next command
+ * @param response - the string that is back from the SIM800L
+ * @param responseCheck - a flag used to determine if the message sent back was read
+ * @papram SIM800L - the buffered serial used between uC and SIM800L P(3_0) and P(3_1) 
+ * @return (void) - none
+ * ------------------------------------------------------------------------------------------------------
+ */
+void read_message(char *response, int *responseCheck, BufferedSerial *SIM800L, int blockSymbol, int request){
+    char buff[20];
+    int loop = 1;
+    int checkMsg = 1;
+    uint32_t timeSaved = mytime.read_ms();
+    int flagc = 0;
+    memset(buff, 0, sizeof(buff));
+    while(loop){
+        if(mytime.read_ms() - timeSaved > 13000){
+            strcpy(buff,"ERROR");  
+            checkMsg = 0;
+            break;
+        }    
+        if(SIM800L->readable() > 0){
+            char tmp = SIM800L->getc();
+            if(request && tmp != '$')continue;
+            if(tmp == 'O' || tmp == '$' || tmp == 'E' || tmp == '>'){
+                if(blockSymbol && tmp =='>')continue;
+                flagc = 1;
+                if(tmp == '>'){
+                    strncat(buff, &tmp, sizeof(tmp));
+                    break;
+                }
+                while(tmp != '\n'){
+                    if(flagc && tmp != ' ' && tmp != '\r'){
+                        strncat(buff, &tmp, sizeof(tmp));
+                        flagc = 0;
+                    }
+                    if(SIM800L->readable() > 0){
+                        tmp = SIM800L->getc();
+                        flagc = 1;
+                    }
+                }
+                loop = 0;
+            }
+        }
+    }
+    /*
+     * Update flag used to check if message was good
+     * Copy response into a buffer to be determined what message was sent
+     * clear memory used
+     */
+     if(!checkMsg){
+         *responseCheck = 0;
+     }else{
+         *responseCheck = 1;
+     }
+     strcpy(response, buff);
+     memset(buff, 0, sizeof(buff));
+}
+
+
+/* 
+ * Function: sendEmergencyLocation
+ * ------------------------------------------------------------------------------------------------------
+ * Send the location of the user to the TWILIO server to ask for assistance
+ * Send a sequency of command to the GSM module (SIM800L)
+ * A received message is also checked to make sure TWILIO had received the message, if not resend the message
+ * A green LED is also turned on when the message was deemed to be received by TWILIO
+ * @param loc - the current location of the user
+ * @param bpm - the heart rate of the user in beats per min
+ * @ return (void) - none
+ */
+void sendEmergencyLocation(char *loc, int bpm){
+    BufferedSerial *SIM800L = new BufferedSerial(P3_1, P3_0);
+    SIM800L->baud(9600); 
+    char buff[100];
+    int checkResponse = 0;      // Check if the response of the GSM module was valid
+    int blockSymbol = 0;        // Block the symbol ">" from being read when processing
+    int checkProcess = 1;       // condition used to determine if the TWILIO had received the SOS message and if all the commands worked properly
+    int request = 0;
+    /*
+     * Each command sent has an expected message sent back in response
+     * These messages are checked before continuing
+     * After all commands are sent and $RECEIVED is sent back from TWILIO clear serial buffer and turn on GREEN LED
+     */
+    while(checkProcess){
+        int request = 0;
+        SIM800L->printf("AT\r\n");               // handshake with GSM module
+        read_message(buff, &checkResponse,SIM800L, blockSymbol, request);
+        if(!checkResponse)continue;
+        if(!strcmp(buff,"OK")){                 // expected message
+            wait(0.1f);
+        }else continue;
+
+        SIM800L->printf("AT+CMGF=1\r\n");             // Set the text mode of the GSM
+        read_message(buff, &checkResponse,SIM800L, blockSymbol, request);
+        if(!checkResponse)continue;
+        if(!strcmp("OK", buff)){
+            wait(0.1f);
+        }else continue;
+        
+        blockSymbol = 0;
+        SIM800L->printf("AT+CNMI=1,2,0,0,0\r\n");             // Set the receiving mode of the GSM module
+        read_message(buff, &checkResponse,SIM800L, blockSymbol, request);
+        if(!checkResponse)continue;
+        if(!strcmp("OK", buff)){                // expected message
+            wait(0.1f);
+        }else continue;
+    
+        SIM800L->printf("AT+CMGS=\"1##########\"\r\n");             // communicate to SIM800L to respond OK
+        read_message(buff, &checkResponse,SIM800L, blockSymbol, request);
+        if(!checkResponse)continue;
+        if(strcmp(">", buff) == 0){             // expected message
+            wait(0.1f);
+        }else continue;
+
+        blockSymbol = 1;
+        SIM800L->printf("%s BPM:%d %c\r\n",loc,bpm,CTRL_Z);             // communicate to SIM800L to respond OK
+        read_message(buff, &checkResponse,SIM800L, blockSymbol, request);
+        if(!checkResponse)continue;
+        if(!strcmp("OK", buff)){                // expected message
+            wait(0.1f);
+        }else continue;
+    
+        blockSymbol = 0;
+        request = 1;
+        read_message(buff, &checkResponse,SIM800L, blockSymbol, request);
+        if(!checkResponse)continue;
+        if(strcmp("$RECEIVED", buff) == 0){     // expected message
+            wait(0.1f);
+            rescueLED = 0;
+            checkProcess = 0;
+        }else continue;
+        SIM800L->printf("AT+CMGF=0\r\n");     // set to the default mode on the SIM800L
+        wait(0.1f);
+    }
+    delete SIM800L;
+}
 
 int main(){
-    pc.baud(PCBAUD);
-    SIM800L.baud(GSMBAUD);
-    
-    //wait(0.1f);
-    SIM800L.puts("AT\r\n");
-    SIM800L.scanf("%s", buf);
-    SIM800L.scanf("%s", buf1);
-    pc.printf("%s\n", buf);
-    pc.printf("%s\n", buf1);
-    
-    //wait(0.01f);
-    
-    SIM800L.puts("AT+CMGF=1\r\n");
-    SIM800L.scanf("%s", buf);
-    SIM800L.scanf("%s", buf1);
-    pc.printf("%s\n", buf);
-    pc.printf("%s\n", buf1);
-    
-    //wait(0.01f);
-    SIM800L.puts("AT+CMGS=\"17039739276\"\r\n");
-    //SIM800L.puts("\r\n");
-    
-//    SIM800L.scanf("%s", buf);
-//    SIM800L.scanf("%s", buf1);
-//    pc.printf("%s\n", buf);
-//    pc.printf("%s\n", buf1);
-    
-    wait(0.1f);
-    
-    SIM800L.printf("This is the automatted program SMS from SIM800L. :D %c\r\n", CTRL_Z);
-    //wait(4);
-    //SIM800L.puts("26\r\n");
-    
-    //wait(0.1f);
-    SIM800L.scanf("%s", buf);
-    SIM800L.scanf("%s", buf1);
-    pc.printf("%s\n", buf);
-    pc.printf("%s\n", buf1);
-    
-    wait(1);
-    
-    //pc.printf("Yike");
-    SIM800L.puts("AT+CMGF=0\r\n");
-    SIM800L.scanf("%s", buf);
-    SIM800L.scanf("%s", buf1);
-    pc.printf("%s\n", buf);
-    pc.printf("%s\n", buf1);
+char loc[50] = "https://www.google.com/maps/place/38 47\'26.16\"N+77 27'44.91\"W";
+int bpm = 100;
+// Send a dummy location/bpm to a phone number
+sendEmergencyLocation(loc,bpm);
 }