One Arduino records data and sends it over serial to a NodeMcu that sends it to data.sparkfun.com.
I have Arduino connected to a HC-06 bluetooth module. I wan't to send data from some Android-Application I wrote to the Arduino and let Arduino do stuff depending on the received data. So far I'm Sending Integer values between 0 and 1024. Unfortunately mySerial.read won't come to an end here. It reads the Data as one big string. Often users go throwing it into programs without fully understanding what it does. It doesn’t help that it’s functionality changed when version 1.0 of the Arduino IDE was released. Does Serial.flush affect the Transmit Buffer or the Receive Buffer and when do you need. How to flush the input serial buffer in Arduino? Ask Question Asked 3 years, 6 months ago. I wish to extract only the 101011 from the received serial data and discard the rest. I came up with this small chunk of code to test it by sending data from my laptop. This is the code. Receive data from Arduino board to Android application.
The 'record' sketch is for a uController that collects accelerometer data and sends it to the esp8266 uController.The 'esp8266' sketch receives the data over serial and sends it over wifi to data.Sparkfun.com
I used a teensy 3.2 uController teensy 3.2 to read a 200G accelerometer, Adafruit ADXL377.I used a NodeMcu for my esp8266.
The 'record' sketch reads a 200G accerlometer with any 3.3V arduino and sends the total accerlation (hit) to an ESP8266 over Serial. In this case I used a second serial hardware Serial1 as available in a Mega, teensy, leonardo uControllers. Could also use TX, pin 1 in an UNO with an appropriate level shifter.
ESP8266 sketch runs on an nodeMcu or any ESP8266 uController. The ESP8266 receives a serial value from an Arduino and sends data via HTTP GET requests to data.sparkfun.com service. Download rar to zip converter.
Connect your arduino TX pin the the ESP8266 RX pin as well as connect the ground pin. Both uController's need to be 3.3volt or a level shifter is required.
Time4Tv provides free Internet Live Sports channels. Watch Free TV and Live Tv Channel Streams from around the world on your computer, Free Online Live Streaming from Anywhere. May 26, 2019 ?️ Movie lovers: try these top 20 sites to watch free movies online. (also excellent places for TV shows, documentaries, and cartoons) Here are the best live sport sites: Batmanstream. With just over 15 million unique visitors each month and 20% of that originating from the USA, this is one of the best places to watch sports live for free. Watch Free TV Channels Online,Sports events, Football matches, Soccer, Cricket, Basketball, NBA, NFL, MLB, Golf, WWE, Boxing, Rugby streaming free online. Watch live video sport streams and broadcasts online - football, ice-hockey, tennis and many other sport types on LiveTV. LiveTV is a free website for live sport streams. If you search for precise channels, please visit the Internet TV and Radio website where you will find a complete list of streams for all channels. Free live sports tv channels online. FreeStreams-live.com Provides Live Streaming of all sports events. You can watch Football, Tennis, Basketball, NBA, NHL, American Football, MLB, Boxing, UFC, Cricket and Volleyball all in place; Freestreams-live. Also, you can watch all your favorite TV Channels 24/7 in HD Stream.
The first character received is a ~ (ASCII 126) and then the data (inputString) followed by an Arduino pirnt return (println) sends the final character (ASCII 13)
You need to get streamId and privateKey at data.sparkfun.com and paste them below. Or just customize this script to talk to other HTTP servers.
Simple updated examples of arduino serial communications
arduino_multibyte_serial_example_1.pde
/* ------------------------------------------------ |
* SERIAL COM - HANDELING MULTIPLE BYTES inside ARDUINO - 01_simple version |
* by beltran berrocal |
* |
* this prog establishes a connection with the pc and waits for it to send him |
* a long string of characters like 'hello Arduino!'. |
* Then Arduino informs the pc that it heard the whole sentence |
* |
* this is the first step for establishing sentence long conversations between arduino and the pc. |
* serialRead() reads one byte at a time from the serial buffer. |
* so in order to print out the whole sentence at once |
* (it is actually still printing one byte at a time but the pc will receive it |
* not interupted by newLines or other printString inside you loop) |
* You must loop untill there are bytes in the serial buffer and |
* and print right away that byte you just read. |
* after that the loop can continue it's tasks. |
* |
* created 15 Decembre 2005; |
* copyleft 2005 Progetto25zero1 <http://www.progetto25zero1.com> |
* |
* --------------------------------------------------- */ |
int serIn; //var that will hold the bytes in read from the serialBuffer |
voidsetup() { |
Serial.begin(9600); |
} |
//auto go_to_the_line function |
//void printNewLine() { |
// Serial.print(13, BYTE); |
// Serial.print(10, BYTE); |
//} |
voidloop () { |
//simple feedback from Arduino Serial.println('Hello World'); |
// only if there are bytes in the serial buffer execute the following code |
if(Serial.available()) { |
//inform that Arduino heard you saying something |
Serial.print('Arduino heard you say: '); |
//keep reading and printing from serial untill there are bytes in the serial buffer |
while (Serial.available()>0){ |
serIn =Serial.read(); //read Serial |
Serial.print(serIn, BYTE); //prints the character just read |
} |
//the serial buffer is over just go to the line (or pass your favorite stop char) |
Serial.println(); |
} |
//slows down the visualization in the terminal |
delay(1000); |
} |
arduino_multibyte_serial_example_2.pde
![Serial Serial](/uploads/1/2/4/9/124913062/328788284.png)
/* ------------------------------------------------ |
* SERIAL COM - HANDELING MULTIPLE BYTES inside ARDUINO - 01_simple version |
* by beltran berrocal |
* |
* this prog establishes a connection with the pc and waits for it to send him |
* a long string of characters like 'hello Arduino!'. |
* Then Arduino informs the pc that it heard the whole sentence |
* |
* this is the first step for establishing sentence long conversations between arduino and the pc. |
* serialRead() reads one byte at a time from the serial buffer. |
* so in order to print out the whole sentence at once |
* (it is actually still printing one byte at a time but the pc will receive it |
* not interupted by newLines or other printString inside you loop) |
* You must loop untill there are bytes in the serial buffer and |
* and print right away that byte you just read. |
* after that the loop can continue it's tasks. |
* |
* created 15 Decembre 2005; |
* copyleft 2005 Progetto25zero1 <http://www.progetto25zero1.com> |
* |
* --------------------------------------------------- */ |
int serIn; //var that will hold the bytes in read from the serialBuffer |
voidsetup() { |
Serial.begin(9600); |
} |
//auto go_to_the_line function |
//void printNewLine() { |
// Serial.print(13, BYTE); |
// Serial.print(10, BYTE); |
//} |
voidloop () { |
//simple feedback from Arduino Serial.println('Hello World'); |
// only if there are bytes in the serial buffer execute the following code |
if(Serial.available()) { |
//inform that Arduino heard you saying something |
Serial.print('Arduino heard you say: '); |
//keep reading and printing from serial untill there are bytes in the serial buffer |
while (Serial.available()>0){ |
serIn =Serial.read(); //read Serial |
Serial.print(serIn, BYTE); //prints the character just read |
} |
//the serial buffer is over just go to the line (or pass your favorite stop char) |
Serial.println(); |
} |
//slows down the visualization in the terminal |
delay(1000); |
} |
arduino_multibyte_serial_example_3.cpp
/* ------------------------------------------------ |
* SERIAL COM - HANDELING MULTIPLE BYTES inside ARDUINO - 03_function development |
* by beltran berrocal |
* |
* this prog establishes a connection with the pc and waits for it to send him |
* a long string of characters like 'hello Arduino!'. |
* Then Arduino informs the pc that it heard the whole sentence |
* |
* the same as examlpe 02 but it deploys 2 reusable functions. |
* for doing the same job. |
* readSerialString() and printSerialString() |
* the only problem is that they use global variables instead of getting them passed |
* as parameters. this means that in order to reuse this code you should also copy |
* the 4 variables instantiated at the beginning of the code. |
* Another problem is that if you expect more than one string at a time |
* you will have to duplicate and change names to all variables as well as the functions. |
* Next version should have the possibility to pass the array as a parameter to the function. |
* |
* created 15 Decembre 2005; |
* copyleft 2005 Progetto25zero1 <http://www.progetto25zero1.com> |
* |
* --------------------------------------------------- */ |
int serIn; // var that will hold the bytes-in read from the serialBuffer |
char serInString[100]; // array that will hold the different bytes 100=100characters; |
// -> you must state how long the array will be else it won't work. |
int serInIndx = 0; // index of serInString[] in which to insert the next incoming byte |
int serOutIndx = 0; // index of the outgoing serInString[] array; |
/*read a string from the serial and store it in an array |
//you must supply the array variable and the index count |
void readSerialString (char *strArray, int indx) { |
int sb; //declare local serial byte before anything else |
Serial.print('reading Serial String: '); |
if(serialAvailable()) { |
while (serialAvailable()){ |
sb = serialRead(); |
strArray[indx] = sb; |
indx++; |
serialWrite(sb); |
} |
} |
Serial.println(); |
} |
*/ |
//read a string from the serial and store it in an array |
//this func uses globally set variable so it's not so reusable |
//I need to find the right syntax to be able to pass to the function 2 parameters: |
// the stringArray and (eventually) the index count |
voidreadSerialString () { |
int sb; |
if(Serial.available()) { |
//Serial.print('reading Serial String: '); //optional confirmation |
while (Serial.available()){ |
sb = Serial.read(); |
serInString[serInIndx] = sb; |
serInIndx++; |
//serialWrite(sb); //optional confirmation |
} |
//Serial.println(); |
} |
} |
//print the string all in one time |
//this func as well uses global variables |
voidprintSerialString() { |
if( serInIndx > 0) { |
Serial.print('Arduino memorized that you said: '); |
//loop through all bytes in the array and print them out |
for(serOutIndx=0; serOutIndx < serInIndx; serOutIndx++) { |
Serial.print( serInString[serOutIndx] ); //print out the byte at the specified index |
//serInString[serOutIndx] = '; //optional: flush out the content |
} |
//reset all the functions to be able to fill the string back with content |
serOutIndx = 0; |
serInIndx = 0; |
Serial.println(); |
} |
} |
voidsetup() { |
Serial.begin(9600); |
Serial.println('Hello World'); |
} |
voidloop () { |
//simple feedback from Arduino |
//read the serial port and create a string out of what you read |
//readSerialString(serInString, serInIndx); |
readSerialString(); |
//do somenthing else perhaps wait for other data or read another Serial string |
Serial.println ('------------ arduino is doing somenthing else '); |
//try to print out collected information. it will do it only if there actually is some info. |
printSerialString(); |
//slows down the visualization in the terminal |
delay(2000); |
} |
commented May 3, 2013
nice write up man. |
commented Aug 22, 2015
commented Jun 7, 2018
What if we wand to send integers like 465 through uart Definitely We have to send 4,6,5 but how to what functiion is over here which can hepl us. Or we have to create our own function. Please answer . |
Arduino Serial Receive Code
Sign up for freeto join this conversation on GitHub. Already have an account? Sign in to comment