Char to ascii arduino. is not used because C compilers can get confused if the next character after the two hex digits is 'a' to 'f'. The Arduino is running the following code: Feb 14, 2018 · I am trying to get user input from the serial monitor to turn a stepper motor according to the input. (then start a new packet) The sensor data goes from 0 to 1023, and the count goes to 32767. Apr 16, 2016 · Hello, Forum! This is my second topic. But since most elecronic communication only uses the trusty old ASCII character set, transmitting unicode text as 16-bit values wastes a lot of electrons. String Apr 28, 2012 · Hi, I'm building a midi controller with Arduino. The Print class pushes out characters one. println reference for more on how characters are translated to numbers. I don't mind which bit length I use as long as it's consistent once I've started. readBytesUntil('', myData, 20);//receive and save all charcaters except ''. So you don't have to convert it to C string, as it's already stored as a C string internally. read ()), the simplest way is to subtract '0'. i. 8bit to one text. char. E. at a time through the write () function. use the below line to print the degree symbol in serial monitor. And as mentioned in comments, the second parameter of strtoul is: endptr Reference to an object of type char*, whose value is set by the function to the next character in str after the numerical value. On top of that, you want to print it as a readable number, not as ASCII. I've tried using the Arduino library's built-in String object: uint8_t my_hex = 0x50; String my_char = String(my_hex) //output 80. Sep 18, 2012 · I suppose that when you write that the data are in ascii it means you get it in a string value. if you read an analog value of 833, the following code would print 'A'. LiquidCrystal lcd(9, 8, 7, 6, 5, 4); long testval = 100000; May 27, 2020 · Save the received ASCII codes in the following array. At the UNO side, you can place the following blocking code (in lieu of the codes of Step-4) at the appropriate place of your sketch to receive all the characters of the string and save in an array named char myData [20]. a string containing two characters: '4' and '8'. int myInt = 42; Next, create a character array ( char array) to store the converted string. Ardunoで文字をASCIIコード（10進数）に変換したいのですが、調べても出てきません。どうすれば良いのでしょうか？ 試したこと. e. The data type is char. Dec 17, 2018 · char XN[9] = {0}; This will hold only 8 characters plus the terminating zero. Apr 28, 2012 · Hi, I'm building a midi controller with Arduino. char ch = 0x35; //hex is compact form of binary and is used for convenience. void loop(){. You can use Arduino in various settings, including programming, general robotics and automation. To convert a float you need use dtostrf(), char * dtostrf( double __val, signed char __width, unsigned char __prec, char * __s) The dtostrf() function converts the double value passed in val into an ASCII representationthat will be stored under s. Replacing it with a terminating null character will make no difference to the outcome. jar file that converts between Unicode chars, \u strings and Octal. currently I've found the following will return [number] int num = [number] str = String(num); str. Nov 12, 2018 · write(b) it as it is. I am testing by having a Arduino pro mini send these characters over serial to A Arduino Mega. char va = analogRead(A0); display. My first one was described as "epic" -> Writing parallel ASCII data from an UNO[solved] - Programming Questions - Arduino Forum I'm trying to get an analogRead() value converted into a 4-character ASCII "string" variable, so that I can display it on my 4-character ASCII display. A string of characters is a variable used to store any types of character from the ASCII table. In fact, you are receiving 0x31, 0x32, and 0x33 and not 495051 which are the images/values that can be seen on the OutputBox of Serial Moniotr in response to print() command. So now I can accurately collect the binary codes and now I'm trying to change the binary codes to characters. system September 10, 2010, 2:09pm 1. Hi. for 65 it will print "41" Mar 7, 2019 · So when you fill an array with ASCII characters the controller sees the ASCII code value and not the character, for example you have already shown that you recognize the value 49 as being the character code for ASCII character '1', notice the single quotes they appear elsewhere in your code. char asciiCode; // char is unsigned 8-bit value. println(s); // or LCD. Prints data to the serial port as human-readable ASCII text. See Serial. i usually generate a string with alphanumeric text and pass the string to the LCD routine to display a string. Jul 7, 2009 · I think that has to do with the Serial. 0xF7 was the degree sign on this display. Numbers are printed using an ASCII character for each digit. I'm using two Arduinos to sent plain text strings to each other using NewSoftSerial and an RF transceiver. Aug 20, 2010 · I'm trying to convert sensor values (mostly large integers) into character strings for use with the virtualwire library, but I can't seem to get this to work using either itoa and sprintf functions. String HEXstring = "74657374"; // This is my HEX string, can be any hex of any size. char a = '0x61'; Is a rubbish statement, you should use. [I really thought this would be a trivial task. println("The character is Ascii Char. Conclusion. When you call itoa(), you are printing the number (48) which will produce the string "48" i. I'm working with a char[] (char array?) from some of the example code of the MKR GSM1400. However, using string literals uses more memory than I would like. char myData[4]; //it will hold 0x31, 0x32, 0x33, and null character (00x00) 3. Here is how to use the string of characters: char String[] = "arduino factory"; Sep 6, 2018 · 0xD is a carriage return and 0xA is a linefeed so it looks like the string of characters is terminated by them. Thank you! Should I do it like this?: char y = EEPROM. To convert a digit to ASCII, OR the byte with 0x30: byte digit = 5; char character = digit | 0x30; Jul 2, 2018 · The Arduino's ADC has 10 bits of precision. for (int i=0; i<dataLength; i++){. (8bit to one text. Exemple: //Exemple of the function that i need. Jan 25, 2022 · 1 ASCII Table ~ Character Map. Eventually, this will function as a 4-digit digital meter, measuring an Jan 2, 2013 · That is how the "conversion" is done. The function is structured as follows: setHours(byte hours) Is there anyway where I can convert the HH Aug 10, 2021 · Let's say I have a hex byte uint8_t my_hex = 0x50 that needs to be converted to its ASCII text equivalent which would be 'P'. Nov 22, 2013 · Tks. Dec 28, 2018 · What Arduino are you using? On the Uno and other ATMEGA based boards, a double occupies 4 bytes. With toggle switches that only know two states it was easy to do (only 0x01 or 0x7F - two values), but I haven't figured out how I can convert an analog value that I've read May 12, 2020 · Figure-1: 3. 2!, dec: 33, hex: 21, oct: 41, bin: 100001. read(x); Serial. char value[] = "25. println ("\t Time (s)\t Humidity (%)\t Temperature (°C) "); Serial monitor output:-. May 16, 2020 · Hi guys i have a MFRC522 set up and reading blocks from it and writing to serial using Serial. c_str(); inside the loop() / setup() code. I'm saving the three characters that comes after the de… Apr 10, 2016 · LiquidCrystal lcd (12, 11, 5, 4, 3, 2); void loop () {} The way I found it is writing each ascii code to the screen. "abcde1245" is 9 characters. Hex \x. To do what you want, you have to either use a 2 dimensional array and copy in the strings, or have an array of pointers which point to your new string. byte m = Serial. stringで辞書に近い文字列を作ってみたものの、変数に2度代入されてしまう。（同じ数値が） As you can see, this is standard 7-bit ASCII padded with zeros to make it 8-bit ASCII. No, the Arduino does not empty the buffer because it has no way of knowing that all of the required characters have been received. I am using IDE 1. Floats have only 6-7 decimal digits of precision. The closest I have is something like this: char text[] = "Hello world"; Feb 14, 2012 · If you're starting with a char (one letter; it's what's returned by Serial. Oct 5, 2012 · This is a code , char to Ascii #include <stdio. If I do a simple loopback test directly in Putty without using the arduino ide the characters are correct. Ah, maybe you need this. 3 = i want the result to be inside a string. Actually gives you access to a const char * to the first element. I can print A to Z on serial, LCD is the same except fewer, shorter lines. Jun 1, 2023 · the result is: '101' which is the decimal value of the ASCII code for 'e' From the reference for. an LCD only prints ASCII characters. lcd. This command takes the same forms as Serial. That means the total number of digits, not the number to the right of the decimal point. This is my arduino code (which isn't correct). Thanks to this type of variable, you can write messages. May 12, 2020 · Figure-1: 3. The GCC compiler used by Arduino also does not accept all unicode sequences such Apr 27, 2020 · 5. long dSep = pow(10, iDigs); // Display value = floal value * separator. char x = 'a'; Aug 1, 2016 · There is a function in the standard Arduino library called dtostrf(). Nov 21, 2010 · If I want to print a byte I use something like. 5 $, dec: 36, hex: 24, oct: 44, bin: 100100. ASCII is numbers that get turned into text by code of the language or hardware you use. Character literals are written in single quotes, like this: 'A' (for multiple characters - strings - use double quotes: "ABC"). a. h>. String ASCIIValue = ""; // Used to put the result. print () command, it might be ignoring the insignificant zeros in the first byte. The size of the char data type is at least 8 bits. read(x) into a char type variable instead of a byte and when you print it you’ll see the corresponding character. Unfortunately, setting the time requires a byte and not a character. print(" "); delay(1); I'm decently new with data-type conversion on the Arduino platform (I have no experience handling ASCII) and haven't been able to find any simple method to convert this output into a string in C/C++. write(97); gcjr November 15, 2020, 10:17am 3. read()); Serial. UKHeliBob November 22, 2013, 5:09pm 3. Please show your code (using code tags) as it's not quit clear what you want to achieve. I think of it as "Decimal to String Float". For example: char ch = 0b00110101; or. h> void main() { char *str1; char May 1, 2013 · From your description, this byte contains an ascii character. This command can take many forms. print(char(0x01)); As you can see, although the message itself is a hex value, it has to be sent in the char format. I've simplified what I'm trying to do to the very basics. 在 Arduino 中使用 toInt() 函数将 char 转换为 int. May 22, 2015 · In Java, a 'char' is a 16-bit value. It only outputs the '82' which is the capital R. Jul 9, 2010 · For each ASCII char: Shift seven bits out of the right end of the ASCII char into the MSB of an output byte, shifting input and output byte (to the right) each time After seven shifts,get the next input character. Users can also convert Char File to ASCII by uploading the file. However my code returns the ASCII value rather than the original input. Mar 24, 2015 · 1 = my source is a STRING that contain HEX, not a char array. Otherwise, do if statement. Notwithstanding the other advice, perhaps you should post the code that saves the "bytes" to EEPROM, and the code the reads the "bytes" from EEPROM, and explain exactly what Apr 29, 2021 · 使用 Arduino 中的 toCharArray() 函数和附加操作符将数据转换为字符. I've spent a couple of hours trying to work out a method to achieve that to no avail. In order to send messages I use commands like Serial. print() Description. Arduino String class provides method c_str(). That is, the double implementation is exactly the same as the float, with no gain in precision. Look up the functions isupper() or islower(), iscntrl(), isdigit(), ispunct() and isspace() to make a determination of which partition the id is a member of first. Aug 18, 2011 · char one_char='f'; one_char=one_char-'a'-'A'; This is when you are sure the one_char is in lower case. Apr 2, 2017 · Example: 10000000 to A. Only then is a terminating null necessary. ) Edit: I should have added - 'readBytesUntil()' copied characters until the ". and delete the char inputString[9]; String a = "680f00af"; has already created a char[9] for you, automagically, and saved it inside the String object a. In the code above you would notice that I tried using "sprint" but I couldn't get it to work, all the characters were just blank, I even increased the buffer size to 10000, but still nothing. I don't follow the need for any conversion. Converting ASCII To Char. For my program, binary signals are received from Tx [Array] to Rx side. . It is set to UTF-8 encoding. Step 2: Use the ASCII Chart. Nov 27, 2015 · Please read this before posting a programming question and then post a complete program showing what you want to do and don't forget to Auto Format the code (Ctrl/T) use code tags. . print (). If I send them using serial via arduino they are rarely correct. I've considered putting the complete payload into an array and converting them one-by-one Mar 5, 2017 · Serial. Nov 26, 2011 · Yes it does. Mar 9, 2017 · This: char results[2]; // also notice the semicolon! is an array of 2 characters, not an array of 2 strings. The ASCII value you want to get is already in your char b. With toggle switches that only know two states it was easy to do (only 0x01 or 0x7F - two values), but I haven't figured out how I can convert an analog value that I've read Sep 23, 2016 · The character array data in your example contains ASCII characters. write() but i want to convert this ASCII bytes to Text like 065 114 100 117 105 110 111 to Text Arduino on the board it &hellip; Characters to ASCII is very unique tool to convert user entered characters to ASCII code (0 and 255). Not only that, but a steam of 16-bit characters is incompatible with a stream of trusty-old 7-bit ASCII characters (badded out to 8 bitys). I'm looking to convert an int value to a char array. Your way works fine, and is perhaps a bit easier to understand. A char is only 8 bits wide. Step 3: Deducing the Meaning. to point to the next place your data array can accept another char, incrementing the index for each addition. My serial RS232 RFID reader say 0102FFD37E and I want show on LCD the dec translate: 4345287550. For example converting 1. But if you want to get down and dirty and assume ASCII and that the values are always letters vs any possible character, and not use the ctype functions, then simply mask off bit 5. You pass in the float, how wide you want the whole number to be (if it will fit), the number of decimals of precision - and the buffer you want it to fill. Delta_G July 10, 2015, 4:43pm Dec 19, 2016 · sterretje December 19, 2016, 12:36pm 2. Memory location always hold data in bit form. What 'data type' is there to declare a variable (ch) that will hold the ASCII code of a character (say 5). Characters are stored as numbers however. 'A' -is- 65. g. Configure the Serial console set at 115200 bauds, sending only Carriage Return. But the Arduino IDE is Unicode. Jan 24, 2020 · I need to send ascii characters over serial communication, but I cant figure out how to send control characters such as Space (32, DEC), Clear (12, DEC), and Delete (127, DEC). Step 2: Configure the console and equipment. 首先，你需要使用 append 运算符将其他数据类型转换为字符串；然后，你可以使用上述方法将此字符串转换为字符。. May 13, 2024 · Description. so on) I have read about the following code from the tutorial of Arduino. char s [40]; int someVal = 123; Jan 10, 2021 · Using Arduino Programming Questions. To use sprintf to convert an int to a char[] in Arduino, begin by declaring an int variable to hold the integer value you want to convert. The code for the converting prosess: // Force number of decimal places to full 2. Share. int iDigs = 2; // Separator = 10 ˆ Number of decimal places. Here is some simple test code I wrote: #include <stdio. How do I convert Serial. I do not need to turn 65 into the letter 'A'. print((char)97); or. I need to translate a 10 digits ASCII number to 10 digits DEC number. char *results_p[2]; result_p[0] = myNewCombinedArray; ASCII, Hex, Binary, Decimal, Base64 converter. h May 13, 2024 · The Arduino Reference text is licensed under a Creative Commons Attribution { // tests if myChar is an Ascii character Serial. Then with each successive char you will need to shift the result right by one space (power of 10) and insert the new value in the 1's column to reassemble the angle typed in. Trying to Print Using the ASCII Code. println(cstr); However, per Majenko's The Evils of Arduino Strings I feel like this code would make my Arduino's heap look like swiss cheese. process is used to push out the individual characters. A data type that takes up 1 byte of memory that stores a character value. Jul 23, 2023 · This printed out the whole ASCII table but some parts of the table were left blank, it is probably because Arduino can't print such characters. Nov 6, 2017 · Hi everyone, I am obtaining the time and date from Bluetooth over serial and placing the data into a char array structured like this: HH:MM:SS I am also using the RTCZero library and would like to set the time for the RTC. HEX is just a text representation of a number (any number). char variable = a; To store an ASCII character in a char variable, use single quotation marks around the character when you declare the variable. I wanted to try constructing the strings/chars from other data types so that I can manipulate the data and print the ascii art without storing it in string literals. If you're starting from a NULL-terminated string, you can use atoi (google it) Dec 10, 2017 · There is a special treatment for the '#' character which lets you send ctrl-Z to mark the end of an SMS as you can't enter that in the Serial Console. Dec 10, 2013 · print () Description. It is not "hex representation", but with some effort you could interpret its contents as such. print(temp[i], HEX); Feb 17, 2017 · It is an ASCII character. byte b = 234; char s[4]; snprintf(s, 4, "%d", b); Serial. println((char)value); // print value as a char. read() into a s May 13, 2024 · A data type used to store a character value. 使用 Arduino 中的 Serial. Char to ASCII Online works well on Windows, MAC, Linux, Chrome, Firefox, Edge, and Safari. See the . 4 #, dec: 35, hex: 23, oct: 43, bin: 100011. Step 1: Get Your ASCII Codes Right. Jun 13, 2021 · const char *inputString = a. parseInt() 函数将 char 转换为 int. print(&va); This is because 833 mod 2 8 = 65, which is the ASCII representation of 'A'. A complete list of all ASCII codes, characters, symbols and signs included in the 7-bit ASCII table and the extended ASCII table according to the Windows-1252 character set, which is a superset of ISO 8859-1 in terms of printable characters. Just use b in your calculations, it already is a number. h> #include <string. Jan 5, 2024 · I am printing some ASCII art to the Serial monitor from Arduino UNO, with some success. Replace 42 with your desired integer. This means that it is possible to do arithmetic Oct 12, 2023 · Arduino Arduino Char Arduino Integer. Reloading it will show the º in the editor but it's really 2 bytes. h> #include <conio. Apr 21, 2023 · Introduction. send 0x32 (the ascii value for the character 2). system November 22, 2013, 5:06pm 2. Bytes are sent as a single character. This is called type-casting. Jul 23, 2017 · Serial. The values are parsed into integers Jul 10, 2015 · the char array already holds the ascii values for the characters you want to send. 3 ", dec: 34, hex: 22, oct: 42, bin: 100010. I recommend using the const keyword for anything like this: const int address = 0; // address 0x0 on the EEPROM. 如果要转换任何其他数据类型而不是字符串，则可以使用它。. print (2) will e. Sep 10, 2010 · ASCII to DEC - Frequently-Asked Questions - Arduino Forum. (As long as there are no more valid characters following. so from you must divide it and then convert it to his hex value. 741. so no '#' can be sent with this code. ie. Sep 10, 2020 · Add a comment. You can always try changing the print parameter from BIN to HEX, or just try putting a space between the printouts. For example if the incoming byte contained the number 48 then this is the ascii code for the character '0'. There is no real conversion for text. The values are parsed into integers Feb 29, 2016 · When you receive a char and change to an int you will get the char equivalent in ASCII. Mar 9, 2019 · ArduinoでASCIIコードを変換したい. 2 = my source can have different length. 05 to char, become 1. char a = 0x61; no single quotes. I'm trying to break apart the URL that I send through to the MKR GSM 1400 so that I don't have to send the API keys for Oct 11, 2016 · See the edit to my last post. I made a little change because I also want to keep the unconverted array: uint8_t utf8Ascii(uint8_t ascii) { //converts a single character. 使用 Arduino 中的简单方法将 char 转换为 int. print(s); system November 21, 2010, 3:58pm 5. The value column corresponds to the numerical value of each character and the char column shows the actual character. h> main() { char c; int a; printf("Enter charater:",c); scanf("%c",&c); printf("%d",c); getch(); } Example : Enter a character : a Result : 97 And this is a code ,string to several Ascii #include <iostream. Jan 5, 2018 · I've searched around and found in the examples from the Arduino that they sometimes add 2 strings together with the + symbol. Dec 14, 2015 · The output is an ASCII capital "R", followed by four ASCII character digits representing the range in millimeters,followed by a carriage return (ASCII 13). If you save that file, then it gets converted to Unicode, which uses two bytes to represent that character. println reference for more on how Apr 30, 2018 · The values are further partitioned between control characters, alpha characters, digits, punctuation and several types of space characters. The first byte is the Jul 13, 2020 · Using Non-ASCII chars in Arduino has a . Use an AND mask to convert the character to a digit: int c = 10 * (a & 0x0F) + (b & 0x0F); When ASCII was invented, the digits 0 to 9 were encoded in hexadecimal as 30 to 39 to enable easy conversion to/from digits and characters. Apr 2, 2012 · The arduino will print °C however I had to cut and paste the symbol, not great but it works. Whenever there are eight bits in the output byte, print it and reset the shift counter. 'A' + 1 has the value 66, since the ASCII value of the capital letter A is 65). 16. I need to convert a String value to its ASCII decimal value. print(trx. It would be best to simply. keep an index to the last character you appended and use that index. But it seems to output its decimal equivalent in string form. Since the ASCII codes for numbers are in order, subtracting '0' means that '0' will become 0, '1' will become 1, '2' will become 2, and so on. Floats are similarly printed as ASCII digits, defaulting to two decimal places. Using octal avoids this problem. You can see the specific encoding in the ASCII chart. This means that it is possible to do arithmetic on characters, in which the Mar 30, 2017 · I spent an afternoon researching this, and read a lot of material, but with no successful results. Nov 5, 2023 · integer: The int variable you want to convert. 5. write (176); I must use/learn that list of backslash codes Feb 14, 2018 · Any, except in Arduino. The value of '0' is actually 48 so you will need to handle that. 8. No null character is needed, as I said. Now it would only show about 20 or so at a time, so I looked at each one then redid the start of the loop with the next number of what was displayed last. To create a character array named "this" containing the ASCII characters for the word "this", using hexadecimal representation, you could use the following: Any ASCII character sent to Arduino via COM port will be "translated" in a timed sequence of Braille symbols by configuring, one character at a time, the dot matrix, so that the "dots" (solenoids) corresponding to the current ASCII character are raised for 500 msec before passing to the subsequent character. 7 &, dec: 38, hex: 26, oct: 46, bin: 100110. 5"; Aug 23, 2013 · Characters are stored as numbers however. For numbers there is a some conversion from numbers into characters that happens then the same. The serial data format is 9600 baud, 8 data bits, no parity, with one stop bit (9600-8-N-1). You can type a º in your code and upload it to the Arduino - it will work perfectly. I know char a = 0x61; works fine, but maybe I was not very clear: the sketch reads the byte values from a web page using the Ethernet library using the read () function like: Feb 18, 2009 · First and foremost -- strcat () is for appending two strings, not adding a single character to the end of a string. c_str() just gives you access to it. Enter ASCII text or hex/binary/decimal numbers: Aug 4, 2011 · Thanks for the conversion!! they do make quite a bit of sense, the ASCII output for the IMU in the serial program looks like this: A TAB Count TAB accelx TAB accely TAB accelz TAB gyro1 TAB gyro 2 TAB gyro 3 TAB Z. if it is ASCII code of a readable character, the Serial Monitor will display it as that character, for example for 65 it will printt 'A' print it as decimal number with print(b). upper_charvalue = charvalue Sorted by: A char is really just a number, which can be seen as a character using the . Often people use a comma to indicate different pieces of information (this format is commonly referred to as comma-separated-values or CSV), but other characters like a space or a period will work too. Jan 16, 2020 · So I took the "in place conversion" example from arduino playground which was also a good opportunity to get rid of the String class. 本教程将讨论将 char 转换为 int 的三种方法。. #include <LiquidCrystal. mrdude: int address = 0; // address 0x0 on the EEPROM. A String doesn't have an ASCII value, only individual characters, so just treat the constituent characters as "into"s, and you've done what you want. Edit2 Sep 20, 2014 · I am using a debug serial port and listening using Putty. 第一种方法是简单的方法，其中我们一次只能 Jun 21, 2023 · This sketch uses the Serial. If you really need an integer, you can use this: int b_ascii_value = b; But a char will probably be enough. Jun 21, 2023 · This sketch uses the Serial. signed long slVal = fVal * dSep; Jun 12, 2011 · Hello, I am sending an ASCII string through the serial port to my arduino board, which looks like this: X000Y000 where 'X' and 'Y' are used as string delimiters. This means that it is possible to do arithmetic on characters, in which the ASCII value of the character is used (e. So, if you read 12 characters then those 2 are still in the buffer next time you read from it. I say rarely because sometimes they do print correctly. What to Note When Converting ASCII To Char. This tool saves your time and helps to convert char data to ascii with ease. char s [40]; int someVal = 123; Nov 14, 2020 · UKHeliBob November 14, 2020, 8:59pm 2. toCharArray(cstr,16); Serial. println(y); Nov 14, 2020 · UKHeliBob November 14, 2020, 8:59pm 2. #include &lt;Stepper. Feb 28, 2020 · ASCII table - A table of ASCII codes, characters and symbols. 4. Serial. parseInt() function to locate values separated by a non-alphanumeric character. Prints data to the serial port as human-readable ASCII text followed by a carriage return character (ASCII 13, or '\r') and a newline character (ASCII 10, or ''). 6 %, dec: 37, hex: 25, oct: 45, bin: 100101. This means that it is possible to do Apr 28, 2019 · Just put the EEPROM. static uint8_t cPrev; uint8_t c = '\0'; Aug 11, 2015 · The table is broken up into two columns for each ASCII character. Forum 2005-2010 (read only) General Frequently-Asked Questions. Dec 11, 2014 · You do not need to translate number to ASCII. ] Is this problem Windows, or WIN10, specific, as It is important to know that characters typed into the serial terminal (or sent from on Arduino to another via serial) are interpreted as ASCII (American Standard Code for Information Interchange) characters and encoded with the decimal number corresponding to the character on the ASCII table. Each string is perhaps 20-30 characters in length. for 65 it will print "65" print it as hexadecimal number with print(b, HEX). tf de ob sg tt ez xw ix lr ku