Akash Gaikwad
Hexiware_WiFi_ESP8266_and_sensor_code
Revision 0:5fcbe9cb4f5b, committed 2017-03-22
- Comitter:
- agaikwad
- Date:
- Wed Mar 22 01:15:16 2017 +0000
- Commit message:
- Hexiware_WiFi_ESP8266_and_sensor_code
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/.gitignore Wed Mar 22 01:15:16 2017 +0000 @@ -0,0 +1,4 @@ +.build +.mbed +projectfiles +*.py*
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ESP8266/ESP8266.cpp Wed Mar 22 01:15:16 2017 +0000
@@ -0,0 +1,168 @@
+#include "ESP8266.h"
+
+// Constructor
+ESP8266::ESP8266(PinName tx, PinName rx, int br) : comm(tx, rx) {
+ comm.baud(br);
+}
+
+// Destructor
+ESP8266::~ESP8266() { }
+
+// Add <CR> + <LF> at the end of the string
+void ESP8266::AddEOL(char * s) {
+ char k;
+ k = strlen(s); // Finds position of NULL character
+ s[k] = 0x0D; // switch NULL for <CR>
+ s[k + 1] = 0x0A; // Add <LF>
+ s[k + 2] = 0; // Add NULL at the end
+}
+
+// Add one ASCII character at the end of the string
+void ESP8266::AddChar(char * s, char c) {
+ char k;
+ k = strlen(s);
+ s[k] = c;
+ s[k + 1] = 0;
+}
+
+// Converts integer number to null-terminated string
+void ESP8266::itoa(int n, char * s) {
+ char k = 0;
+ char r[11];
+
+ if(n == 0) {
+ s[0] = '0';
+ s[1] = 0;
+ } else {
+ while(n != 0) {
+ r[k]= (n % 10) + '0';
+ n = n / 10;
+ k++;
+ }
+ while(k > 0) {
+ s[n] = r[k - 1] + '0';
+ n++;
+ k--;
+ }
+ s[n] = 0;
+ }
+}
+
+// Sends command to ESP8266. Receives the command string
+void ESP8266::SendCMD(char * s) {
+ AddEOL(s);
+ comm.printf("%s", s);
+}
+
+// Resets the ESP8266
+void ESP8266::Reset(void) {
+ char rs[10];
+ strcpy(rs, "AT+RST");
+ SendCMD(rs);
+}
+
+// Receive reply until no character is received after a given timeout in miliseconds
+void ESP8266::RcvReply(char * r, int to) {
+ Timer t;
+ bool ended = 0;
+ char c;
+
+ strcpy(r, "");
+ t.start();
+ while(!ended) {
+ if(comm.readable()) {
+ c = comm.getc();
+ AddChar(r, c);
+ t.start();
+ }
+ if(t.read_ms() > to) {
+ ended = 1;
+ }
+ }
+ AddChar(r, 0x00);
+}
+
+// Gets the AP list. Parameter: the string to receive the list
+void ESP8266::GetList(char * l) {
+ char rs[15];
+ strcpy(rs, "AT+CWLAP");
+ SendCMD(rs);
+ RcvReply(l, 5000); // Needs big timeout because it takes long to start replying
+}
+
+// Joins a Wifi AP. Parameters: SSID and Password (strings)
+void ESP8266::Join(char * id, char * pwd) {
+ char cmd[255];
+ strcpy(cmd, "AT+CWJAP=");
+ AddChar(cmd, 0x22);
+ strcat(cmd, id);
+ AddChar(cmd, 0x22);
+ AddChar(cmd, 0x2C);
+ AddChar(cmd, 0x22);
+ strcat(cmd, pwd);
+ AddChar(cmd, 0x22);
+ SendCMD(cmd);
+}
+
+// Gets ESP IP. Parameter: string to contain IP
+void ESP8266::GetIP(char * ip) {
+ char cmd[15];
+ strcpy(cmd, "AT+CIFSR");
+ SendCMD(cmd);
+ RcvReply(ip, 2000);
+}
+
+//Defines wifi mode; Parameter: mode; 1= STA, 2= AP, 3=both
+void ESP8266::SetMode(char mode) {
+ char cmd[15];
+ strcpy(cmd, "AT+CWMODE=");
+ mode = mode + 0x30; // Converts number into corresponding ASCII character
+ AddChar(cmd, mode); // Completes command string
+ SendCMD(cmd);
+}
+
+// Quits the AP
+void ESP8266::Quit(void) {
+ char cmd[15];
+ strcpy(cmd, "AT+CWQAP");
+ SendCMD(cmd);
+}
+
+// Sets single connection
+void ESP8266::SetSingle(void) {
+ char cmd[15];
+ strcpy(cmd, "AT+CIPMUX=0");
+ SendCMD(cmd);
+}
+
+// Sets multiple connection
+void ESP8266::SetMultiple(void) {
+ char rs[15];
+ strcpy(rs, "AT+CIPMUX=1");
+ SendCMD(rs);
+}
+
+// Gets connection status. Parameter: string to contain status
+void ESP8266::GetConnStatus(char * st) {
+ char cmd[15];
+ strcpy(cmd, "AT+CIPSTATUS");
+ SendCMD(cmd);
+ RcvReply(st, 2000);
+}
+
+// Starts server mode. Parameter: port to be used
+void ESP8266::StartServerMode(int port) {
+ char rs[25];
+ char t[4];
+ strcpy(rs, "AT+CIPSERVER=1,");
+ itoa(port, t);
+ strcat(rs, t);
+ SendCMD(rs);
+}
+
+// Close server mode.
+void ESP8266::CloseServerMode(void) {
+ char rs[20];
+ strcpy(rs, "AT+CIPSERVER=0");
+ SendCMD(rs);
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ESP8266/ESP8266.h Wed Mar 22 01:15:16 2017 +0000
@@ -0,0 +1,67 @@
+#ifndef ESP8266_H
+#define ESP8266_H
+
+#include <string>
+#include "mbed.h"
+
+class ESP8266
+{
+public:
+/**
+ * ESP8266 constructor
+ *
+ * @param tx TX pin
+ * @param rx RX pin
+ * @param br Baud Rate
+ */
+ ESP8266(PinName tx, PinName rx, int br);
+
+ /**
+ * ESP8266 destructor
+ */
+ ~ESP8266();
+
+void SendCMD(char * s);
+void Reset(void);
+void RcvReply(char * r, int to);
+void GetList(char * l);
+void Join(char * id, char * pwd);
+void GetIP(char * ip);
+void SetMode(char mode);
+void Quit(void);
+void SetSingle(void);
+void SetMultiple(void);
+void GetConnStatus(char * st);
+void StartServerMode(int port);
+void CloseServerMode(void);
+
+private:
+Serial comm;
+void AddEOL(char * s);
+void AddChar(char * s, char c);
+void itoa(int c, char s[]);
+
+};
+
+#endif
+/*
+ COMMAND TABLE
+ Basic:
+ AT: Just to generate "OK" reply
+ Wifi:
+ AT+RST: restart the module
+ AT+CWMODE: define wifi mode; AT+CWMODE=<mode> 1= Sta, 2= AP, 3=both; Inquiry: AT+CWMODE? or AT+CWMODE=?
+ AT+CWJAP: join the AP wifi; AT+ CWJAP =<ssid>,< pwd > - ssid = ssid, pwd = wifi password, both between quotes; Inquiry: AT+ CWJAP?
+ AT+CWLAP: list the AP wifi
+ AT+CWQAP: quit the AP wifi; Inquiry: AT+CWQAP=?
+ * AT+CWSAP: set the parameters of AP; AT+CWSAP= <ssid>,<pwd>,<chl>,<ecn> - ssid, pwd, chl = channel, ecn = encryption; Inquiry: AT+CWJAP?
+ TCP/IP:
+ AT+CIPSTATUS: get the connection status
+ * AT+CIPSTART: set up TCP or UDP connection 1)single connection (+CIPMUX=0) AT+CIPSTART= <type>,<addr>,<port>; 2) multiple connection (+CIPMUX=1) AT+CIPSTART= <id><type>,<addr>, <port> - id = 0-4, type = TCP/UDP, addr = IP address, port= port; Inquiry: AT+CIPSTART=?
+ * AT+CIPSEND: send data; 1)single connection(+CIPMUX=0) AT+CIPSEND=<length>; 2) multiple connection (+CIPMUX=1) AT+CIPSEND= <id>,<length>; Inquiry: AT+CIPSEND=?
+ * AT+CIPCLOSE: close TCP or UDP connection; AT+CIPCLOSE=<id> or AT+CIPCLOSE; Inquiry: AT+CIPCLOSE=?
+ AT+CIFSR: Get IP address; Inquiry: AT+ CIFSR=?
+ AT+CIPMUX: set mutiple connection; AT+ CIPMUX=<mode> - 0 for single connection 1 for mutiple connection; Inquiry: AT+CIPMUX?
+ AT+CIPSERVER: set as server; AT+ CIPSERVER= <mode>[,<port> ] - mode 0 to close server mode, mode 1 to open; port = port; Inquiry: AT+CIFSR=?
+ * +IPD: received data
+*/
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/README.md Wed Mar 22 01:15:16 2017 +0000 @@ -0,0 +1,87 @@ +# Getting started with Blinky on mbed OS + +This guide reviews the steps required to get Blinky working on an mbed OS platform. + +Please install [mbed CLI](https://github.com/ARMmbed/mbed-cli#installing-mbed-cli). + +## Import the example application + +From the command-line, import the example: + +``` +mbed import mbed-os-example-blinky +cd mbed-os-example-blinky +``` + +### Now compile + +Invoke `mbed compile`, and specify the name of your platform and your favorite toolchain (`GCC_ARM`, `ARM`, `IAR`). For example, for the ARM Compiler 5: + +``` +mbed compile -m K64F -t ARM +``` + +Your PC may take a few minutes to compile your code. At the end, you see the following result: + +``` +[snip] ++----------------------------+-------+-------+------+ +| Module | .text | .data | .bss | ++----------------------------+-------+-------+------+ +| Misc | 13939 | 24 | 1372 | +| core/hal | 16993 | 96 | 296 | +| core/rtos | 7384 | 92 | 4204 | +| features/FEATURE_IPV4 | 80 | 0 | 176 | +| frameworks/greentea-client | 1830 | 60 | 44 | +| frameworks/utest | 2392 | 512 | 292 | +| Subtotals | 42618 | 784 | 6384 | ++----------------------------+-------+-------+------+ +Allocated Heap: unknown +Allocated Stack: unknown +Total Static RAM memory (data + bss): 7168 bytes +Total RAM memory (data + bss + heap + stack): 7168 bytes +Total Flash memory (text + data + misc): 43402 bytes +Image: .\.build\K64F\ARM\mbed-os-example-blinky.bin +``` + +### Program your board + +1. Connect your mbed device to the computer over USB. +1. Copy the binary file to the mbed device. +1. Press the reset button to start the program. + +The LED on your platform turns on and off. + +## Export the project to Keil MDK, and debug your application + +From the command-line, run the following command: + +``` +mbed export -m K64F -i uvision +``` + +To debug the application: + +1. Start uVision. +1. Import the uVision project generated earlier. +1. Compile your application, and generate an `.axf` file. +1. Make sure uVision is configured to debug over CMSIS-DAP (From the Project menu > Options for Target '...' > Debug tab > Use CMSIS-DAP Debugger). +1. Set breakpoints, and start a debug session. + + + +## Troubleshooting + +1. Make sure `mbed-cli` is working correctly and its version is `>1.0.0` + + ``` + mbed --version + ``` + + If not, you can update it: + + ``` + pip install mbed-cli --upgrade + ``` + +2. If using Keil MDK, make sure you have a license installed. [MDK-Lite](http://www.keil.com/arm/mdk.asp) has a 32 KB restriction on code size. \ No newline at end of file
Binary file img/uvision.png has changed
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Mar 22 01:15:16 2017 +0000
@@ -0,0 +1,213 @@
+
+#include "mbed.h"
+#include "ESP8266.h" // Include header file from Author: Antonio Quevedo
+#include "math.h"
+#include <string>
+
+#define APIKEY 45IE5JPN8ZIK2W2M //Put "Write key" of your channel in thingspeak.com
+#define IP "184.106.153.149" // IP Address of "api.thingspeak.com\"
+#define WIFI_SSID "Redmi"
+#define WIFI_PASS "akash12345"
+
+Serial pc(USBTX,USBRX);
+SPI spi(PTC6,PTC7,PTC5); // (MOSI MISO CLK)setup SPI interface on pins PTC5,PTC6,PTC7
+ESP8266 esp(PTC17, PTC16, 115200); // baud rate for wifi
+
+DigitalOut cs1(PTC4);
+DigitalOut cs2(PTC3);
+I2C i2c(PTD9,PTD8);
+
+//AnalogIn check(PTB6);
+const int addr = 0x88;
+
+char snd[255],rcv[1000],snd_Data[255]; //snd= string used to send command to ESP 8266 wii and rcv = string used to receive response from ESP8266 wifi module
+
+int cnt = 0; // counter for number of motion detected
+int cnt1 = 0; // counter for number of motion detected
+int cnt2 = 0; // counter for number of motion detected
+
+float ammeter_out = 0;
+float voltmeter_out = 0;
+float light_out = 0;
+
+void esp_initialize(void); // Function used to initialize ESP8266 wifi module
+void esp_send(void); // Function used to connect with thingspeak.com and update channel using ESP8266 wifi module
+
+int main()
+{
+
+ pc.baud(115200); // Baud rate used for communicating with Tera-term on PC
+
+ pc.printf("START\r\n"); // Starting point
+
+ esp_initialize();
+
+ //ammeter + voltmeter code
+ spi.format(8,0);
+ spi.frequency(1000000);
+ pc.printf("Analog read test from spi.\n");
+ pc.printf("\n\r");
+
+ //light code
+ int exp,exp1,l=1;
+ i2c.frequency(100000); // set required i2c frequency
+ //pc.baud(9600); //set baud rate
+ pc.printf("I2C started!\r\n");
+ pc.printf("\n\r");
+ char cmd[3]; //for byte transfer
+
+ while (1)
+ {
+ wait(15);
+ //ammeter code
+
+ cs1=0;
+ //spi.write();
+ //pc.printf("%d\r\n",k);
+ int high_byte = spi.write(0);
+ int low_byte = spi.write(0);
+ cs1=1;
+ float m = ((high_byte & 0x1f) << 7) | ((low_byte >> 1));
+ float k= (float)((m*1)/4096); // show value in volts.
+ ammeter_out = (float)((k-0.5)*1000);
+ pc.printf("Current value: %f mA\r\n", ammeter_out);
+ //pc.printf("Analog Value of current : %.2f\n\r",m);
+ wait_ms(100);
+
+ cs2=0;
+ //spi.write();
+ //pc.printf("%d\r\n",k);
+ int hi_byte = spi.write(0);
+ int lo_byte = spi.write(0);
+ cs2=1;
+ float x = ((hi_byte & 0x1f) << 7) | ((lo_byte >> 1));
+
+ float r= (float)((x*33)/4096); // show value in volts.
+ voltmeter_out = (float)(r-16.5);
+ pc.printf("AD Voltage channel value: %f V\r\n", voltmeter_out);
+ //pc.printf("Voltage Analog Value: %.2f\n\r",x);
+ wait_ms(100);
+
+ //ambient light sensor code
+
+ cmd[0] = 0x01; //configuration register
+ cmd[1]= 0xCC; //configuration data
+ cmd[2]= 0x01; //configuration data
+ i2c.write(addr, cmd, 3);
+ cmd[0] = 0x00; // data register
+ i2c.write(addr, cmd, 1);
+ wait_ms(100);
+ i2c.read(addr, cmd, 2);
+
+ exp= cmd[0]>>4;
+ exp1= (cmd[0]-(exp<<4))*256+cmd[1];
+ // pc.printf("exponent = 0x%x\n\r", exp);
+ // pc.printf("fraction = %d\n\r", exp1);
+ l=1;
+ for(int r=0;r<exp;r++){l=l*2;};
+ // pc.printf("value = %d\n\r", l);
+ light_out= (exp1*l)/100;
+ pc.printf("Lux = %.2f\n\r", light_out); // printing LUX value
+ pc.printf("\n\r");
+ wait_ms(100);
+
+ pc.printf("Sending this information to thingspeak.com = %d\r\n",cnt);
+ esp_send();
+
+ }
+}
+
+
+void esp_initialize(void)
+{
+ pc.printf("Initializing ESP\r\n");
+
+ pc.printf("Reset ESP\r\n");
+ esp.Reset(); //RESET ESP
+ esp.RcvReply(rcv, 400); //receive a response from ESP
+ //pc.printf(rcv); //Print the response onscreen
+ wait(2);
+
+ strcpy(snd,"AT");
+ esp.SendCMD(snd);
+ pc.printf(snd);
+ //wait(2);
+ esp.RcvReply(rcv, 400);
+ pc.printf(rcv);
+ wait(0.1);
+
+ strcpy(snd,"AT+CWMODE=1");
+ esp.SendCMD(snd);
+ pc.printf(snd);
+ wait(2);
+
+ strcpy(snd,"AT+CWJAP=\"");
+ strcat(snd,WIFI_SSID);
+ strcat(snd,"\",\"");
+ strcat(snd,WIFI_PASS);
+ strcat(snd,"\"");
+
+ esp.SendCMD(snd);
+ pc.printf(snd);
+ wait(5);
+ esp.RcvReply(rcv, 400);
+ pc.printf("\n %s \n", rcv);
+
+ strcpy(snd,"AT+CIPMUX=0");
+ esp.SendCMD(snd);
+ pc.printf(snd);
+ //wait(2);
+ esp.RcvReply(rcv, 400);
+ pc.printf("\n %s \n", rcv);
+
+}
+
+
+void esp_send(void)
+{
+
+ //ESP updates the Status of Thingspeak channel//
+
+ strcpy(snd,"AT+CIPSTART=");
+ strcat(snd,"\"TCP\",\"");
+ strcat(snd,IP);
+ strcat(snd,"\",80");
+
+ esp.SendCMD(snd);
+ pc.printf("S\r\n%s",snd);
+ //wait(2);
+ esp.RcvReply(rcv, 1000);
+ pc.printf("R\r\n%s",rcv);
+ wait(1);
+
+ sprintf(snd,"GET https://api.thingspeak.com/update?key=45IE5JPN8ZIK2W2M&field1=%f&field2=%f&field3=%f\r\n",ammeter_out,voltmeter_out,light_out);
+
+ int i=0;
+ for(i=0;snd[i]!='\0';i++);
+ i++;
+ char cmd[255];
+
+ sprintf(cmd,"AT+CIPSEND=%d",i); //Send Number of open connection and Characters to send
+ esp.SendCMD(cmd);
+ pc.printf("S\r\n%s",cmd);
+ while(i<=20 || rcv == ">")
+ {
+ esp.RcvReply(rcv, 1000);
+ wait(100);
+ i++;
+ }
+ pc.printf("R\r\n%s",rcv);
+
+ esp.SendCMD(snd); //Post value to thingspeak channel
+ pc.printf("S\r\n%s",snd);
+
+ while(i<=20 || rcv == "OK")
+ {
+ esp.RcvReply(rcv, 1000);
+ wait(100);
+ i++;
+ }
+ pc.printf("R\r\n%s",rcv);
+
+}
+
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os.lib Wed Mar 22 01:15:16 2017 +0000 @@ -0,0 +1,1 @@ +https://github.com/ARMmbed/mbed-os/#f4864dc6429e1ff5474111d4e0f6bee36a759b1c