add thingspeak example, using 512bytes buffer

Author: tuanpmt

README.md

@@ -55,6 +55,11 @@ esp8266/tools/esptool.py -p COM1 write_flash 0x00000 esp8266/debug/0x00000.bin 0
 
 **4. Import arduino library and run example:**
 
+Example read DHT11 and send to [thingspeak.com](http://thingspeak.com)
+=========
+- Using DHT11 library from: [https://github.com/RobTillaart/Arduino](https://github.com/RobTillaart/Arduino)
+
+![](images/thingspeak.png)
 
 Example for MQTT client
 =======

esp8266/debug/0x00000.bin

@@ -106,12 +106,12 @@ void ESP::protoCompletedCb(void)
   }
 }
 
-void ESP::wifiConnect(String ssid, String password)
+void ESP::wifiConnect(const char* ssid, const char* password)
 {
   uint16_t crc;
   crc = request(CMD_WIFI_CONNECT, (uint32_t)&wifiCb, 0, 2);
-  crc = request(crc,(uint8_t*)ssid.c_str(), ssid.length());
-  crc = request(crc,(uint8_t*)password.c_str(), password.length());
+  crc = request(crc,(uint8_t*)ssid, strlen(ssid));
+  crc = request(crc,(uint8_t*)password, strlen(password));
   request(crc);
 }
 
@@ -138,7 +138,6 @@ uint16_t ESP::request(uint16_t crc_in, uint8_t* data, uint16_t len)
   uint16_t pad_len = len;
   while(pad_len % 4 != 0)
     pad_len++;
-
   _serial->write((uint8_t*)&pad_len, 2);
   crc_in = crc16_data((uint8_t*)&pad_len, 2, crc_in);
   while(len --){

esp8266/debug/0x40000.bin

@@ -94,7 +94,7 @@ class ESP
   uint16_t return_cmd;
   boolean is_return;
 
-  void wifiConnect(String ssid, String password);
+  void wifiConnect(const char* ssid, const char* password);
   void process();
   uint16_t request(uint16_t cmd, uint32_t callback, uint32_t _return, uint16_t argc);
   uint16_t request(uint16_t crc_in, uint8_t* data, uint16_t len);
@@ -110,7 +110,7 @@ class ESP
 
   boolean _debugEn;
   PROTO _proto;
-  uint8_t _protoBuf[1024];
+  uint8_t _protoBuf[512];
   int _chip_pd;
 
 

esp8266/release/0x00000.bin

@@ -0,0 +1,94 @@
+/**
+ * \file
+ *       ESP8266 RESTful Bridge example
+ * \author
+ *       Tuan PM <[email protected]>
+ */
+
+#include <SoftwareSerial.h>
+#include <espduino.h>
+#include <rest.h>
+#include <dht.h>
+
+dht DHT;
+
+
+SoftwareSerial debugPort(2, 3); // RX, TX
+
+ESP esp(&Serial, &debugPort, 4);
+
+REST rest(&esp);
+
+boolean wifiConnected = false;
+
+void wifiCb(void* response)
+{
+  uint32_t status;
+  RESPONSE res(response);
+
+  if(res.getArgc() == 1) {
+    res.popArgs((uint8_t*)&status, 4);
+    if(status == STATION_GOT_IP) {
+      debugPort.println("WIFI CONNECTED");
+     
+      wifiConnected = true;
+    } else {
+      wifiConnected = false;
+    }
+    
+  }
+}
+
+void setup() {
+  Serial.begin(19200);
+  debugPort.begin(19200);
+  esp.enable();
+  delay(500);
+  esp.reset();
+  delay(500);
+  while(!esp.ready());
+
+  debugPort.println("ARDUINO: setup rest client");
+  if(!rest.begin("api.thingspeak.com")) {
+    debugPort.println("ARDUINO: failed to setup rest client");
+    while(1);
+  }
+
+  /*setup wifi*/
+  debugPort.println("ARDUINO: setup wifi");
+  esp.wifiCb.attach(&wifiCb);
+
+  esp.wifiConnect("DVES_HOME","wifipassword");
+  debugPort.println("ARDUINO: system started");
+}
+
+void loop() {
+  char response[266];
+  esp.process();
+  if(wifiConnected) {
+    int chk = DHT.read11(7);
+    if(chk == DHTLIB_OK){
+      char buff[64];
+      char str_hum[6], str_temp[6];
+      dtostrf(DHT.humidity, 4, 2, str_hum);
+      dtostrf(DHT.temperature, 4, 2, str_temp);
+      sprintf(buff, "/update?api_key=MAY03AKJDMPP4Y4I&field1=%s&field2=%s", str_hum, str_temp);
+      debugPort.println(buff);
+      rest.get((const char*)buff);
+      debugPort.println("ARDUINO: send get");
+
+      if(rest.getResponse(response, 266) == HTTP_STATUS_OK){
+        debugPort.println("ARDUINO: GET successful");
+        debugPort.println(response);
+      }
+      delay(30000);
+      
+    } else {
+      debugPort.print("error,\r\n"); 
+    }
+    
+    
+  }
+  
+  
+}

esp8266/release/0x40000.bin

@@ -19,13 +19,15 @@ void REST::restCallback(void *resp)
 
 boolean REST::begin(const char* host, uint16_t port, boolean security)
 {
-  
+  uint8_t sec = 0;
+  if(security)
+    sec = 1;
   restCb.attach(this, &REST::restCallback);
 
   uint16_t crc = esp->request(CMD_REST_SETUP, (uint32_t)&restCb, 1, 3);
   crc = esp->request(crc,(uint8_t*)host, strlen(host));
   crc = esp->request(crc,(uint8_t*)&port, 2);
-  crc = esp->request(crc,(uint8_t*)&security, 1);
+  crc = esp->request(crc,(uint8_t*)&sec, 1);
   esp->request(crc);
 
   if(esp->waitReturn(timeout) && esp->return_value != 0){