Diff: readme.txt

Revision:

0:a96892f55b07

Child:

3:d00432b8cb4a

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/readme.txt	Thu Feb 18 18:33:40 2016 +0000
@@ -0,0 +1,122 @@
+xAP enabled one wire master part I
+Author: Zhongying Qiao
+Date: 10th March 2014
+
+Updated@24th July 2015
+
+Description:
+
+The program is intended for master-slave communication between mbed and DS1920 thermometer iButton;
+
+-> Program will first connect to Ethernet, display iButton ID dynamically onto a webpage via websocket: sockets.mbed.org/ 
+choose 'ws' for channel 'georg' (see address in code below)
+
+-> Once the temperature measurement exceeds a preset threshold, an xAP message will be sent from mbed,
+which then triggers a python script running on another computer to listen at UDP port 3639. Upon authenticating the 
+source(mbed), the script triggers another Ruby program that launches an API call to Twitter account '@qzynjls' to send a tweet. 
+
+-> To see how the program can interact with twitter API to tweet via mbed, import program "xAP_enable_oneWire_Master_Part2";
+
+
+Python(3) and Ruby script for TwitterAPI: 
+
+-> master.py
+
+import socket 
+from subprocess import Popen, PIPE, STDOUT 
+BROADCAST_PORT = 3639 
+s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) 
+s.bind(('0.0.0.0', BROADCAST_PORT)) 
+ 
+while True: 
+    data, addr= s.recvfrom(500) 
+ 
+    if addr[0]=='172.20.177.4': 
+        print ('launching slave process...') 
+        slave = Popen(['ruby', 'slave.rb'], stdin=PIPE, stdout=PIPE, 
+stderr=STDOUT) 
+        # read user input, expression to be evaluated: 
+        #line = input('Enter expression or exit:') 
+        # write that line to slave's stdin 
+        #slave.stdin.write(bytes(line+'\n', 'UTF-8')) 
+        # result will be a list of lines: 
+        result = [] 
+        print('hey there') 
+        # read slave output line by line, until we reach "[end]" 
+        while True: 
+            print('hey there') 
+            # check if slave has terminated: 
+            if slave.poll() is not None: 
+                print ('slave has terminated.') 
+                exit() 
+            # read one line, remove newline chars and trailing spaces: 
+            line = slave.stdout.readline().rstrip() 
+ 
+            print ('line:', line) 
+            if line == '[end]': 
+                break 
+            result.append(line) 
+        print ('result:') 
+        print ('\n'.join(result)) 
+        sleep(10) 
+    else: 
+        print('detect xAP heartbeat, will not be tweeted!') 
+        
+->slave.rb
+
+require 'rubygems' 
+require 'oauth' 
+require 'json' 
+ 
+consumer_key = OAuth::Consumer.new( 
+  #add your own OAuth consumer key here ) 
+access_token = OAuth::Token.new( 
+  #add your own OAuth Token here )  
+ 
+# read command from standard input: 
+while true 
+ 
+ 
+  # if command is "exit", terminate: 
+    # else evaluate command, send result to standard output: 
+ 
+    baseurl = "https://api.twitter.com" 
+    path    = "/1.1/statuses/update.json" 
+    address = URI("#{baseurl}#{path}") 
+    request = Net::HTTP::Post.new address.request_uri 
+    request.set_form_data( 
+      "status" => "hello from bitmessage!", 
+    ) 
+ 
+    # Set up HTTP. 
+    http             = Net::HTTP.new address.host, address.port 
+    http.use_ssl     = true 
+    http.verify_mode = OpenSSL::SSL::VERIFY_PEER 
+ 
+    # Issue the request. 
+    request.oauth! http, consumer_key, access_token 
+    http.start 
+    response = http.request request 
+ 
+    # Parse and print the Tweet if the response code was 200 
+    tweet = nil 
+    if response.code == '200' then 
+        tweet = JSON.parse(response.body) 
+        puts "Successfully sent #{tweet["text"]}" 
+    else 
+        puts "Could not send the Tweet! " + 
+        "Code:#{response.code} Body:#{response.body}" 
+    end 
+    # and append [end] so that master knows it's the last line: 
+    #print eval(cmd),"\n" 
+    #cmd = STDIN.gets 
+    # remove whitespaces: 
+    #cmd.chop! 
+    # if command is "exit", terminate: 
+ 
+    print "mission acomplished! \n" 
+    print "[end]\n" 
+    # flush stdout to avoid buffering issues: 
+    STDOUT.flush 
+ 
+end 
\ No newline at end of file