Library for using the Wifi module ESP8266, first version with basic commands, soon new commands will be added
Dependents: PIR_Sensor_wifi myESP8266forLOstFound Motin_Activated_Temperature_Humidity_BluetoothHC-06_ESP8266_IOT 1Project3_Robot1_Final ... more
Library updated in Dec 28, 2014. Now the ESP baudrate is passed as a parameter in the constructor. Also, some new functions were added. Here is an example code:
ESP8266 example code
#include "mbed.h" #include <string> #include "ESP8266.h" // Objects Serial pc(USBTX, USBRX); ESP8266 esp(PTE0, PTE1, 115200); // Global variables char snd[255], rcv[1000]; // Strings for sending and receiving commands / data / replies int main() { pc.baud(115200); pc.printf("START\r\n"); wait(3); pc.printf("Reset ESP\r\n"); esp.Reset(); esp.RcvReply(rcv, 400); pc.printf("%s", rcv); wait(2); pc.printf("Sending AT\r\n"); strcpy(snd, "AT"); esp.SendCMD(snd); esp.RcvReply(rcv, 400); pc.printf("%s", rcv); wait(2); pc.printf("Set mode to AP\r\n"); esp.SetMode(1); esp.RcvReply(rcv, 1000); pc.printf("%s", rcv); pc.printf("Receiving Wifi List\r\n"); esp.GetList(rcv); pc.printf("%s", rcv); pc.printf("Connecting to AP\r\n"); esp.Join("MyAP", "MyPasswd"); // Replace MyAP and MyPasswd with your SSID and password esp.RcvReply(rcv, 1000); pc.printf("%s", rcv); wait(8); pc.printf("Getting IP\r\n"); esp.GetIP(rcv); pc.printf("%s", rcv); pc.printf("Setting multiple connections\r\n"); esp.SetMultiple(); esp.RcvReply(rcv, 1000); pc.printf("%s", rcv); pc.printf("Getting Connection Status\r\n"); esp.GetConnStatus(rcv); pc.printf("%s", rcv); pc.printf("Start server mode on port 80\r\n"); esp.StartServerMode(80); esp.RcvReply(rcv, 1000); pc.printf("%s", rcv); wait(4); pc.printf("Close server mode\r\n"); esp.CloseServerMode(); esp.RcvReply(rcv, 1000); pc.printf("THE END"); while(1); }
Diff: ESP8266.cpp
- Revision:
- 2:77388e8f0697
- Parent:
- 1:399414d48048
--- a/ESP8266.cpp Wed Dec 17 13:54:34 2014 +0000 +++ b/ESP8266.cpp Sun Dec 28 21:58:49 2014 +0000 @@ -1,8 +1,8 @@ #include "ESP8266.h" // Constructor -ESP8266::ESP8266(PinName tx, PinName rx) : comm(tx, rx) { - comm.baud(115200); +ESP8266::ESP8266(PinName tx, PinName rx, int br) : comm(tx, rx) { + comm.baud(br); } // Destructor @@ -25,6 +25,29 @@ 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); @@ -117,4 +140,29 @@ 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); } \ No newline at end of file