plotly interface based on ardunio sample code
Library for plotting a simple x/y scatter chart on the plot.ly website.
See plotly_HelloWorld for sample usage.
Diff: plotly.cpp
- Revision:
- 7:9409a72ab6c0
- Parent:
- 5:fc8eefeb301b
- Parent:
- 6:e57d6e9313f4
- Child:
- 8:d4f705ba2ea5
--- a/plotly.cpp Mon Jul 28 10:56:42 2014 +0000 +++ b/plotly.cpp Tue Jul 29 13:30:31 2014 +0000 @@ -4,13 +4,13 @@ #define plotlyURL "plot.ly" #define dataURL "arduino.plot.ly" -plotly::plotly(char *username, char *api_key, char* stream_token, char *filename) +plotly::plotly(const char *username, const char *api_key, const char** stream_tokens, const char *filename, int nTraces) { log_level = 3; // 0 = Debugging, 1 = Informational, 2 = Status, 3 = Errors, 4 = Quiet (// Serial Off) dry_run = false; username_ = username; api_key_ = api_key; - stream_token_ = stream_token; + stream_tokens = stream_tokens; filename_ = filename; maxpoints = 30; world_readable = true; @@ -18,22 +18,35 @@ timezone = "America/Montreal"; fileopt = "overwrite"; - socket = NULL; + nTraces_ = nTraces; + sockets = (TCPSocketConnection **)malloc(sizeof(TCPSocketConnection *) * nTraces_); + for (int i = 0; i< nTraces_; i++) { + *(sockets+i) = NULL; + } initalised = false; + } plotly::~plotly() { - closeStream(); - + closeStreams(); + if (sockets) + free(sockets); } bool plotly::init() { + fprintf(stderr,"%d tokens\n",nTraces_); + wait(1); + for (int i = 0; i<nTraces_; i++) { + fprintf(stderr,"%s\n",*(stream_tokens_+i)); + wait(1); + } + // // Create plot with a REST post to plotly // See the clientresp section of https://plot.ly/rest/ for details @@ -46,11 +59,13 @@ if (!dry_run) { int pause = 1; - socket = new TCPSocketConnection(); - while (socket->connect(plotlyURL, 80) < 0) { + *sockets = new TCPSocketConnection(); + if (!*sockets) + return false; + while ((*sockets)->connect(plotlyURL, 80) < 0) { if (pause > 30) { fprintf(stderr,"Failed to connect. :-(\n"); - delete socket; + delete (*sockets); return false; } fprintf(stderr,"... Couldn\'t connect to plotly's REST servers... trying again!\n"); @@ -67,18 +82,22 @@ print_("Host: 107.21.214.199\r\n"); print_("User-Agent: Arduino/0.5.1\r\n"); print_("plotly-streamtoken: "); - print_(stream_token_); + for (int i = 0; i<nTraces_; i++) { + print_(stream_tokens_[i]); + if ( i < (nTraces_-1) ) + print_(","); + } printNetTerminator_(); print_("Content-Length: "); - // calculate the length of the packet payload and store it in the big buffer. - int lineLen = snprintf(buffer,k_bufferSize,"version=2.3&origin=plot&platform=arduino&un=%s&key=%s&args=[",username_,api_key_); - lineLen += snprintf((buffer+lineLen),k_bufferSize-lineLen,"{\"y\": [], \"x\": [], \"type\": \"scatter\", \"stream\": {\"token\": \"%s\", \"maxpoints\": %d}}",stream_token_,maxpoints); + unsigned long lineLen = snprintf(buffer,k_bufferSize,"version=2.3&origin=plot&platform=arduino&un=%s&key=%s&args=[",username_,api_key_); + for(int i=0; i<nTraces_; i++) { + lineLen += snprintf((buffer+lineLen),k_bufferSize-lineLen,"{\"y\": [], \"x\": [], \"type\": \"scatter\", \"stream\": {\"token\": \"%s\", \"maxpoints\": %d}}%s",stream_tokens_[i],maxpoints,((nTraces_ > 1) && (i != nTraces_-1))?", ":""); + } lineLen += snprintf((buffer+lineLen),k_bufferSize-lineLen,"]&kwargs={\"fileopt\": \"%s\", \"filename\": \"%s\", \"world_readable\": %s}",fileopt,filename_,world_readable?"true":"false"); print_(lineLen); - printNetTerminator_(); printNetTerminator_(); @@ -109,7 +128,7 @@ if(!dry_run) { while(!proceed) { - int32_t dataIn = socket->receive(buffer,k_bufferSize -1); + int32_t dataIn = (*sockets)->receive(buffer,k_bufferSize -1); if (dataIn < 0) { if(log_level < 3) fprintf(stderr,"error reading network socket\n"); break; @@ -172,7 +191,7 @@ } if(!dry_run && !proceed && log_level < 4) { - fprintf(stderr,"... Error initializing stream, aborting. Try again or get in touch with Chris at chris@plot.ly\n"); + fprintf(stderr,"... Error initializing stream, aborting.\n"); } if(!dry_run && proceed && log_level < 3) { @@ -191,15 +210,33 @@ if (proceed || dry_run) { initalised = true; } - if (socket) { - delete socket; - socket=NULL; + if (*sockets) { + delete *sockets; + *sockets=NULL; } return initalised; } -bool plotly::openStream() +void plotly::openStreams() +{ + for (int i = 0; i< nTraces_; i++) { + openStream(i); + } +} + +void plotly::closeStreams() { + for (int i = 0; i< nTraces_; i++) { + closeStream(i); + } +} + + +bool plotly::openStream(int stream) +{ + + if (stream >= nTraces_) + return false; if (!initalised) return false; @@ -208,22 +245,20 @@ // Start request to stream servers // - if (socket) { - delete socket; - socket = NULL; + if (*(sockets+stream) != NULL) { + delete *(sockets+stream); + *(sockets+stream) = NULL; } - if(log_level < 3) fprintf(stderr,"... Connecting to plotly's streaming servers...\n"); - if (!dry_run) { int pause = 1; - socket = new TCPSocketConnection(); - while (socket->connect(dataURL, 80) < 0) { + *(sockets + stream) = new TCPSocketConnection(); + while ((*(sockets + stream))->connect(dataURL, 80) < 0) { if (pause > 30) { fprintf(stderr,"Failed to connect. :-(\n"); - delete socket; + delete *(sockets + stream); return false; } fprintf(stderr,"... Couldn\'t connect to plotly's REST servers... trying again!\n"); @@ -233,139 +268,148 @@ } - if(log_level < 3) fprintf(stderr,"... Connected to plotly's streaming servers\n... Initializing stream\n"); + if(log_level < 3) fprintf(stderr,"... Connected to plotly's streaming servers\n... Initializing stream %d\n",stream); - print_("POST / HTTP/1.1\r\n"); - print_("Host: arduino.plot.ly\r\n"); - print_("User-Agent: Python\r\n"); - print_("Transfer-Encoding: chunked\r\n"); - print_("Connection: close\r\n"); - print_("plotly-streamtoken: "); - print_(stream_token_); - printNetTerminator_(); + print_("POST / HTTP/1.1\r\n",stream); + print_("Host: arduino.plot.ly\r\n",stream); + print_("User-Agent: Python\r\n",stream); + print_("Transfer-Encoding: chunked\r\n",stream); + print_("Connection: close\r\n",stream); + print_("plotly-streamtoken: ",stream); + print_(stream_tokens_[stream],stream); + printNetTerminator_(stream); if(convertTimestamp) { - print_("plotly-convertTimestamp: \""); - print_(timezone); - print_("\""); - printNetTerminator_(); + print_("plotly-convertTimestamp: \"",stream); + print_(timezone,stream); + print_("\"",stream); + printNetTerminator_(stream); } - printNetTerminator_(); + printNetTerminator_(stream); if(log_level < 3) fprintf(stderr,"... Done initializing, ready to stream!\n"); return true; } -void plotly::closeStream() +void plotly::closeStream( int stream) { - if (socket) { - if (socket->is_connected()) { - print_("0\r\n\r\n"); - socket->close(); + if (stream >= nTraces_) + return; + + if (*(sockets+stream) != NULL) { + if ((*(sockets+stream))->is_connected()) { + print_("0\r\n\r\n",stream); + (*(sockets+stream))->close(); } - delete socket; - socket=NULL; + delete *(sockets+stream); + *(sockets+stream)=NULL; } } -void plotly::reconnectStream() +void plotly::reconnectStream(int number) { - while(!dry_run && (!socket || !socket->is_connected())) { + while(!dry_run && (!(*(sockets+number)) || !(*(sockets+number))->is_connected())) { if(log_level<4) fprintf(stderr,"... Disconnected from streaming servers\n"); - closeStream(); - openStream(); + closeStream(number); + openStream(number); } } -void plotly::plot(unsigned long x, int y) + +void plotly::plot(unsigned long x, int y, int stream) { if (!initalised) return; - reconnectStream(); + reconnectStream(stream); // need to prefix with the length so print it once to get the content lenght and then a second time with the prefix. int len = snprintf(buffer,k_bufferSize,"{\"x\": %lu, \"y\": %d}\n", x,y); len = snprintf(buffer,k_bufferSize,"%x\r\n{\"x\": %lu, \"y\": %d}\n\r\n",len, x,y); - sendFormatedText(buffer,len); + sendFormatedText(buffer,len,stream); } -void plotly::plot(unsigned long x, float y) +void plotly::plot(unsigned long x, float y, int stream) { if (!initalised) return; - reconnectStream(); + reconnectStream(stream); // need to prefix with the length so print it once to get the content lenght and then a second time with the prefix. int len = snprintf(buffer,k_bufferSize,"{\"x\": %lu, \"y\": %.3f}\n", x,y); len = snprintf(buffer,k_bufferSize,"%x\r\n{\"x\": %lu, \"y\": %.3f}\n\r\n",len, x,y); - sendFormatedText(buffer,len); + sendFormatedText(buffer,len,stream); } -void plotly::plot(float x, float y) +void plotly::plot(float x, float y, int stream) { if (!initalised) return; - reconnectStream(); - + reconnectStream(stream); // need to prefix with the length so print it once to get the content lenght and then a second time with the prefix. int len = snprintf(buffer,k_bufferSize,"{\"x\": %.3f, \"y\": %.3f}\n", x,y); len = snprintf(buffer,k_bufferSize,"%x\r\n{\"x\": %.3f, \"y\": %.3f}\n\r\n",len, x,y); - sendFormatedText(buffer,len); + sendFormatedText(buffer,len,stream); } -bool plotly::print_(int d) +bool plotly::print_(int d, int stream) { char smallBuffer[10]; int32_t len = snprintf(smallBuffer,10,"%d",d); - return sendFormatedText(smallBuffer,len); + return sendFormatedText(smallBuffer,len,stream); } -bool plotly::print_(unsigned long d) +bool plotly::print_(unsigned long d, int stream) { char smallBuffer[12]; int32_t len = snprintf(smallBuffer,12,"%lu",d); - return sendFormatedText(smallBuffer,len); + return sendFormatedText(smallBuffer,len,stream); } -bool plotly::print_(float d) +bool plotly::print_(float d, int stream) { char smallBuffer[12]; int32_t len = snprintf(smallBuffer,12,"%f",d); - return sendFormatedText(smallBuffer,len); + return sendFormatedText(smallBuffer,len,stream); } -bool plotly::printNetTerminator_() +bool plotly::printNetTerminator_(int stream) { - return sendFormatedText("\r\n",2); + return sendFormatedText("\r\n",2,stream); } -bool plotly::print_(char *d) // strings could be long, use the big buffer + +bool plotly::print_(const char *d, int stream)// strings could be long, use the big buffer { int32_t len = snprintf(buffer,k_bufferSize,"%s",d); - return sendFormatedText(buffer,len); + return sendFormatedText(buffer,len,stream); } +bool plotly::printHex_(uint16_t d, int stream) +{ + int32_t len = snprintf(buffer,k_bufferSize,"%X",d); + return sendFormatedText(buffer,len,stream); +} -bool plotly::sendFormatedText(char* data, int size) +bool plotly::sendFormatedText(char* data, int size, int stream) { if(log_level < 2) { fprintf(stderr,"%s",data); } if(!dry_run) { - if (!socket) { + if (!*(sockets+stream)) { fprintf(stderr,"\nTX failed, No network socket exists\n"); return false; } - if (!(socket->is_connected())) { + if (!((*(sockets+stream))->is_connected())) { fprintf(stderr,"\nTX failed, Network socket not connected\n"); return false; } - int32_t sent = socket->send_all(data,size); + int32_t sent = (*(sockets+stream))->send_all(data,size); if (sent == size) return true; else {