Revision 0:597aea501d68, committed 2015-12-10

Comitter:

robinlk

Date:

Thu Dec 10 01:53:20 2015 +0000

Commit message:

Simple code to upload temperature readings to SensorUp SensorThings Playground (http://pg.sensorup.com)from the LM75B temperature sensor in an mbed application board.It works with mbed LPC1768.

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/C12832.lib	Thu Dec 10 01:53:20 2015 +0000
@@ -0,0 +1,1 @@
+https://mbed.org/users/chris/code/C12832/#7de323fa46fe

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/EthernetNetIf.lib	Thu Dec 10 01:53:20 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/donatien/code/EthernetNetIf/#bc7df6da7589

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LM75B.lib	Thu Dec 10 01:53:20 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/neilt6/code/LM75B/#fc27dc535ea9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TinyHTTP.cpp	Thu Dec 10 01:53:20 2015 +0000
@@ -0,0 +1,240 @@
+/*
+ * mbed Tiny HTTP Client
+ * Copyright (c) 2011 Hiroshi Suga
+ * Released under the MIT License: http://mbed.org/license/mit
+ */
+
+/** @file
+ * @brief Tiny HTTP Client
+ */
+
+#include "mbed.h"
+#include "EthernetNetIf.h"
+#include "TCPSocket.h"
+#include "DNSRequest.h"
+#include "TinyHTTP.h"
+#include <ctype.h>
+
+
+TCPSocket *http;
+volatile int tcp_ready, tcp_readable, tcp_writable;
+volatile int dns_status;
+
+// Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
+int base64enc(const char *input, unsigned int length, char *output, int len) {
+  static const char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+  unsigned int c, c1, c2, c3;
+
+  if (len < ((((length-1)/3)+1)<<2)) return -1;
+  for(unsigned int i = 0, j = 0; i<length; i+=3,j+=4) {
+    c1 = ((((unsigned char)*((unsigned char *)&input[i]))));
+    c2 = (length>i+1)?((((unsigned char)*((unsigned char *)&input[i+1])))):0;
+    c3 = (length>i+2)?((((unsigned char)*((unsigned char *)&input[i+2])))):0;
+
+    c = ((c1 & 0xFC) >> 2);
+    output[j+0] = base64[c];
+    c = ((c1 & 0x03) << 4) | ((c2 & 0xF0) >> 4);
+    output[j+1] = base64[c];
+    c = ((c2 & 0x0F) << 2) | ((c3 & 0xC0) >> 6);
+    output[j+2] = (length>i+1)?base64[c]:'=';
+    c = (c3 & 0x3F);
+    output[j+3] = (length>i+2)?base64[c]:'=';
+  }
+  output[(((length-1)/3)+1)<<2] = '\0';
+  return 0;
+}
+
+// Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
+int urlencode(char *str, char *buf, int len) {
+  static const char to_hex[] = "0123456789ABCDEF";
+//  char *pstr = str, *buf = (char*)malloc(strlen(str) * 3 + 1), *pbuf = buf;
+  char *pstr = str, *pbuf = buf;
+
+  if (len < (strlen(str) * 3 + 1)) return -1;
+  while (*pstr) {
+    if (isalnum(*pstr) || *pstr == '-' || *pstr == '_' || *pstr == '.' || *pstr == '~') {
+      *pbuf++ = *pstr;
+    } else if (*pstr == ' ') {
+      *pbuf++ = '+';
+    } else { 
+      *pbuf++ = '%';
+      *pbuf++ = to_hex[(*pstr >> 4) & 0x0f];
+      *pbuf++ = to_hex[*pstr & 0x0f];
+    }
+    pstr++;
+  }
+  *pbuf = '\0';
+  return 0;
+}
+
+
+void isr_http (TCPSocketEvent e) {
+
+#ifdef DEBUG
+    printf("tcp(%d)\r\n", e);
+#endif
+    switch(e) {
+    case TCPSOCKET_CONNECTED:
+        tcp_ready = 1;
+        break;
+
+    case TCPSOCKET_READABLE: //Incoming data
+        tcp_readable = 1;
+        break;
+
+    case TCPSOCKET_WRITEABLE: //We can send data
+        tcp_writable = 1;
+        break;
+
+    case TCPSOCKET_CONTIMEOUT:
+    case TCPSOCKET_CONRST:
+    case TCPSOCKET_CONABRT:
+    case TCPSOCKET_ERROR:
+    case TCPSOCKET_DISCONNECTED:
+        tcp_ready = 0;
+        break;
+    }
+}
+
+void createauth (char *user, char *pwd, char *buf, int len) {
+    char tmp[80];
+
+    strncpy(buf, "Authorization: Basic ", len);
+    snprintf(tmp, sizeof(tmp), "%s:%s", user, pwd);
+    base64enc(tmp, strlen(tmp), &buf[strlen(buf)], len - strlen(buf));
+    strncat(buf, "\r\n", len - strlen(buf));
+}
+
+void isr_dns (DNSReply r) {
+
+#ifdef DEBUG
+    printf("dns(%d)\r\n", r);
+#endif
+    if (DNS_FOUND) {
+        dns_status = 1;
+    } else {
+        dns_status = -1;
+    }
+}
+
+int httpRequest (int method, Host *host, char *uri, char *head, char *body) {
+    TCPSocketErr err;
+    Timer timeout;
+    char buf[1500];
+    int i, ret = -1;
+
+    http = new TCPSocket;
+    tcp_ready = 0;
+    tcp_readable = 0;
+    tcp_writable = 0;
+
+    http->setOnEvent(isr_http);
+
+    // connect
+    if (host->getIp().isNull()) {
+        // resolv
+        DNSRequest dns;
+        dns_status = 0;
+        dns.setOnReply(isr_dns);
+        if (dns.resolve(host) != DNS_OK) goto exit;
+        timeout.reset();
+        timeout.start();
+        while (timeout.read_ms() < HTTP_TIMEOUT) {
+            if (dns_status) break;
+            Net::poll();
+        }
+        timeout.stop();
+        if (dns_status <= 0) goto exit;
+#ifdef DEBUG
+        printf("%s [%d.%d.%d.%d]\r\n", host->getName(), (unsigned char)host->getIp()[0], (unsigned char)host->getIp()[1], (unsigned char)host->getIp()[2], (unsigned char)host->getIp()[3]);
+#endif
+    }
+    if (! host->getPort()) {
+        host->setPort(HTTP_PORT);
+    }
+    err = http->connect(*host);
+    if (err != TCPSOCKET_OK) goto exit;
+
+    // wait connect
+    timeout.reset();
+    timeout.start();
+    while (timeout.read_ms() < HTTP_TIMEOUT) {
+        if (tcp_ready) break;
+        Net::poll();
+    }
+    timeout.stop();
+    if (! tcp_ready) goto exit;
+
+    // send request
+    if (method == METHOD_POST) {
+        http->send("POST ", 5);
+    } else {
+        http->send("GET ", 4);
+    }
+    http->send(uri, strlen(uri));
+    http->send(" HTTP/1.1\r\nHost: ", 17);
+    http->send(host->getName(), strlen(host->getName()));
+    http->send("\r\n", 2);
+    http->send("Connection: close\r\n", 19);
+    if (head) {
+        http->send(head, strlen(head));
+    }
+    if (method == METHOD_POST) {
+        sprintf(buf, "Content-Length: %d\r\n", strlen(body));
+        http->send(buf, strlen(buf));
+    }
+    http->send("\r\n", 2);
+
+    // post method
+    if (method == METHOD_POST && body) {
+        http->send(body, strlen(body));
+    }
+
+    // wait responce
+    timeout.reset();
+    timeout.start();
+    while (timeout.read_ms() < HTTP_TIMEOUT) {
+        if (tcp_readable) break;
+        Net::poll();
+    }
+    timeout.stop();
+    if (! tcp_readable) goto exit;
+
+    // recv responce
+    i = http->recv(buf, sizeof(buf) - 1);
+    buf[i] = 0;
+    if (i < sizeof(buf) - 1) tcp_readable = 0;
+    if (strncmp(buf, "HTTP/", 5) == 0) {
+        ret = atoi(&buf[9]);
+    }
+#ifdef DEBUG
+    printf(buf);
+#endif
+
+    // recv dummy
+    timeout.reset();
+    timeout.start();
+    while (timeout.read_ms() < HTTP_TIMEOUT) {
+        if (tcp_readable) {
+            i = http->recv(buf, sizeof(buf) - 1);
+            buf[i] = 0;
+            if (i < sizeof(buf) - 1) tcp_readable = 0;
+#ifdef DEBUG
+            printf(buf);
+#endif
+            timeout.reset();
+        } else
+        if (! tcp_ready) {
+            break;
+        }
+        Net::poll();
+    }
+    timeout.stop();
+
+exit:
+    http->resetOnEvent();
+    http->close();
+    delete http;
+
+    return ret;
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TinyHTTP.h	Thu Dec 10 01:53:20 2015 +0000
@@ -0,0 +1,38 @@
+/*
+ * mbed Tiny HTTP Client
+ * Copyright (c) 2011 Hiroshi Suga
+ * Released under the MIT License: http://mbed.org/license/mit
+ */
+
+/** @file
+ * @brief Tiny HTTP Client
+ */
+
+#ifndef TinyHTTP_h
+#define TinyHTTP_h
+
+#define DEBUG
+
+#define HTTP_PORT 80
+#define HTTP_TIMEOUT 15000 // ms
+
+#define METHOD_GET 0
+#define METHOD_POST 1
+
+/** send http request
+ * @param method METHOD_GET or METHOD_POST
+ * @param host http server
+ * @param uri URI
+ * @param head http header (CR+LF) (or NULL)
+ * @param body POST body (or NULL)
+ * @return http code, -1:failue
+ */
+int httpRequest (int method, Host *host, char *uri, char *head, char *body);
+
+void createauth (char *user, char *pwd, char *buf, int len);
+
+int base64enc(const char *input, unsigned int length, char *output, int len);
+
+int urlencode(char *str, char *buf, int len);
+
+#endif

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Dec 10 01:53:20 2015 +0000
@@ -0,0 +1,86 @@
+/*
+ * This content is released under the (https://opensource.org/licenses/MIT) MIT License.
+ *
+ * Simple code to upload temperature readings to SensorUp SensorThings Playground (http://pg.sensorup.com)
+ * from the LM75B temperature sensor(https://developer.mbed.org/cookbook/LM75B-Temperature-Sensor)   
+ * in an mbed application board(https://developer.mbed.org/cookbook/mbed-application-board)
+ * It works with mbed LPC1768. (https://developer.mbed.org/platforms/mbed-LPC1768/)
+ */
+#include "mbed.h"
+#include "EthernetNetIf.h"
+#include "TCPSocket.h"
+#include "TinyHTTP.h"
+#include "LM75B.h"
+#include "C12832.h"
+
+/*
+* Change the DATASTREAM_ID_TEMP to the id of you SensorThigns Datastream.
+* You can get the Datastream <id> from the SensorUp playground's Observation
+* API Request:/st-playground/proxy/v1.0/Datastreams(<id>)/Observations
+*/
+const int DATASTREAM_ID_TEMP = 116680;
+/*
+* Change the ACCESS_TOKEN to the token of you SensorThigns Datastream
+* You can get the ACCESS_TOKEN from the SensorUp playground's Observation 
+* API Request: St-P-Access-Token: 78cc7eb2-9394-4675-b231-ff0a377a3674
+*/
+const char *ACCESS_TOKEN = "78cc7eb2-9394-4675-b231-ff0a377a3674";
+/*
+* Interval(second) to post temperature
+*/
+const int INTERVAL  = 5;
+// Temperature sensor
+LM75B sensor(p28,p27);
+//Ethernet network interface
+EthernetNetIf eth;
+//LCD
+C12832 lcd(p5, p7, p6, p8, p11);
+
+int postToServer(float temp)
+{
+    Host host;
+	char msg[50],uri[100], head[160];
+	// header
+	snprintf(head, sizeof(head), "Content-type: application/json\r\nSt-P-Access-Token: %s\r\n", ACCESS_TOKEN);
+	// uri
+	snprintf(uri, sizeof(uri), "/st-playground/proxy/v1.0/Datastreams(%d)/Observations", DATASTREAM_ID_TEMP);
+	// msg
+	snprintf(msg, sizeof(msg), "{\"result\":%.3f\n}", temp);
+
+	host.setName("pg-api.sensorup.com");
+	host.setPort(HTTP_PORT);
+	return httpRequest(METHOD_POST, &host, uri, head, msg);
+}
+
+int main () {
+    EthernetErr ethErr;
+    Host host;
+    int r;
+	// Start the Ethernet connection
+    ethErr = eth.setup();
+    if(ethErr) {
+        printf("connect error\r\n");
+        return -1;
+    }
+	printf("start\r\n");
+
+ 	//Try to open the LM75B
+    if (sensor.open()) {
+        printf("Device detected!\n");
+
+        while (1) {
+            lcd.cls();
+            lcd.locate(0,3);
+            //Display the air temperature on LCD
+            //The returned temperature is in degrees Celcius.
+            lcd.printf("Temp = %.3f\n", (float)sensor);
+            // Post temperature to SensorUp SensorThings Playground
+            r = postToServer((float)sensor);
+            printf("status %d\r\n", r);
+            wait(INTERVAL);
+        }
+    } else {
+        error("Device not detected!\n");
+    }
+    return 0;
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Thu Dec 10 01:53:20 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/63bcd7ba4912