Kazuo Tsubaki
Very simple example using ESP-WROOM-02 (ESP-8266) from LPC1114
Revision 0:e450010334e1, committed 2016-05-13
- Comitter:
- kazz12211
- Date:
- Fri May 13 12:05:34 2016 +0000
- Commit message:
- Use ESP-WROOM-02 (ESP-8266) from LPC1114 using SoftSerial.
Changed in this revision
diff -r 000000000000 -r e450010334e1 ESP8266/ESP8266.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ESP8266/ESP8266.cpp Fri May 13 12:05:34 2016 +0000
@@ -0,0 +1,140 @@
+#include "ESP8266.h"
+
+#define LOG_DEBUG(s) if(logger != NULL) { logger->printf("%s\r\n", s); };
+
+ESP8266::ESP8266(SoftSerial *s) {
+ stream = s;
+}
+
+ESP8266::~ESP8266() {
+}
+
+void ESP8266::setLogger(Serial *l) {
+ logger = l;
+}
+
+bool ESP8266::_ok() {
+ return (strstr(replybuffer, "OK\r\n") != NULL);
+}
+
+bool ESP8266::nop() {
+ sendRequest("AT\r\n");
+ timeout=20;
+ getReply();
+ return _ok();
+}
+
+bool ESP8266::reset() {
+ LOG_DEBUG("Reset & get Firmware");
+ sendRequest("AT+RST\r\n");
+ timeout=200;
+ getReply();
+ LOG_DEBUG(replybuffer);
+ return _ok();
+}
+
+void ESP8266::version() {
+ LOG_DEBUG("Get Version");
+ sendRequest("AT+GMR\r\n");
+ timeout=200;
+ getReply();
+ LOG_DEBUG(replybuffer);
+}
+
+// 1=Station, 2=AP, 3=BOTH, default=Station
+bool ESP8266::mode(int mode) {
+ char cmd[255];
+ sprintf(cmd, "AT+CWMODE=%d\r\n", mode);
+ sendRequest(cmd);
+ timeout=60;
+ getReply();
+ LOG_DEBUG(replybuffer);
+ return _ok();
+}
+
+// 0=Single, 1=Multi
+bool ESP8266::connectionMode(int connMode) {
+ char cmd[255];
+ sprintf(cmd, "AT+CIPMUX=%d\r\n", connMode);
+ sendRequest(cmd);
+ timeout=80;
+ getReply();
+ LOG_DEBUG(replybuffer);
+ return _ok();
+}
+
+void ESP8266::connectionStatus() {
+ LOG_DEBUG("Get Connection Status");
+ sendRequest("AT+CIPSTA?\r\n");
+ timeout=100;
+ getReply();
+ LOG_DEBUG(replybuffer);
+}
+
+bool ESP8266::config() {
+ timeout=1000; getcount=600;
+ wait(1);
+
+ if(!nop())
+ return false;
+ wait(1);
+
+ version();
+ wait(3);
+
+ if(!mode(1))
+ return false;
+ wait(2);
+
+ if(!connectionMode(1))
+ return false;
+ wait(2);
+
+ return true;
+}
+
+bool ESP8266::connect(char *ssid, char *password) {
+ char cmd[256];
+ LOG_DEBUG("Connecting");
+ strcpy(cmd, "AT+CWJAP=\"");
+ strcat(cmd, ssid);
+ strcat(cmd, "\",\"");
+ strcat(cmd, password);
+ strcat(cmd, "\"\r\n");
+ LOG_DEBUG(cmd);
+ sendRequest(cmd);
+ timeout=10000;
+ getReply();
+
+ wait(5);
+
+ return _ok();
+}
+
+void ESP8266::sendRequest(char *req) {
+ strcpy(cmdbuffer, req);
+ sendCmd();
+}
+
+char *ESP8266::readResponse() {
+ getReply();
+ return replybuffer;
+}
+
+
+void ESP8266::sendCmd() {
+ stream->printf("%s", cmdbuffer);
+}
+
+void ESP8266::getReply() {
+ memset(replybuffer, '\0', sizeof(replybuffer));
+ replycount = 0;
+ t.reset(); t.start();
+ while(t.read_ms() < timeout && replycount < getcount) {
+ if(stream->readable()) {
+ replybuffer[replycount] = stream->getc();
+ replycount++;
+ }
+ }
+}
+
diff -r 000000000000 -r e450010334e1 ESP8266/ESP8266.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ESP8266/ESP8266.h Fri May 13 12:05:34 2016 +0000
@@ -0,0 +1,66 @@
+/**
+ * Use ESP-8266 (called ESP-WROOM-02 in Japan) from LPC1114
+ * LPC1114 has only 1 Hardware UART so this class uses SoftSerial to
+ * communicate with ESP-8266.
+ * I wrote like this class for Arduino then partially ported to mbed.
+ *
+ * 2016/05/13
+ * By Kazuo Tsubaki
+ **/
+
+#ifndef __ESP8266__
+#define __ESP8266__
+
+#include <mbed.h>
+#include "SoftSerial.h"
+
+class ESP8266 {
+public:
+
+ // Constructor
+ ESP8266(SoftSerial *s);
+ ~ESP8266();
+
+ // Example for configuring ESP
+ bool config();
+ // Use Serial to logging
+ void setLogger(Serial *log);
+
+ // Connect to WiFi AP
+ bool connect(char *ssid, char *password);
+ // Send command to ESP-8266 (see AT command list of the module)
+ void sendRequest(char *req);
+ // Read resultant response of AT command. Needs some waits to read after AT command.
+ char *readResponse();
+
+ // AT
+ bool nop();
+ // AT+GMR
+ void version();
+ // AT+RST
+ bool reset();
+ // AT+CWMODE=n n= 1:Station Mode, 2:AP Mode, 3:Station Mode + AP Mode
+ bool mode(int mode);
+ // AT+CIPMUX=n n= 0:Single, 1=Multi
+ bool connectionMode(int connMode);
+ // AT+CIPSTA?
+ void connectionStatus();
+
+private:
+
+ void sendCmd();
+ void getReply();
+ bool _ok();
+
+private:
+
+ char cmdbuffer[266];
+ char replybuffer[1024];
+ SoftSerial *stream;
+ int replycount, timeout, getcount;
+ Timer t;
+ Serial *logger;
+};
+
+
+#endif
diff -r 000000000000 -r e450010334e1 SoftSerial.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SoftSerial.lib Fri May 13 12:05:34 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/Sissors/code/SoftSerial/#a0029614de72
diff -r 000000000000 -r e450010334e1 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri May 13 12:05:34 2016 +0000
@@ -0,0 +1,37 @@
+#include "mbed.h"
+#include "SoftSerial.h"
+#include "ESP8266.h"
+
+Serial *logger;
+SoftSerial *ser;
+ESP8266 *esp;
+
+int main() {
+ logger = new Serial(USBTX, USBRX);
+ ser = new SoftSerial(dp18, dp17);
+
+ ser->baud(9600);
+ logger->baud(9600);
+
+ esp = new ESP8266(ser);
+ esp->setLogger(logger);
+
+ if(!esp->config()) {
+ logger->printf("Configuration failed.\r\n");
+ return -1;
+ }
+
+ if(!esp->connect("ArtesWare HQ Main", "kt621221")) {
+ logger->printf("Connection failed.\r\n");
+ return -1;
+ }
+
+ esp->connectionStatus();
+
+ delete esp;
+ delete logger;
+ delete ser;
+
+ return 0;
+
+}
diff -r 000000000000 -r e450010334e1 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri May 13 12:05:34 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/7c328cabac7e \ No newline at end of file