serial monitor not printing

Using Arduino Programming Questions
#1

i wrote this code in order to receive the input from my RC transmitter…but however when i try to read the values i cannot read the values…!! :frowning:
void setup()
{
pinMode(0,INPUT);
pinMode(1,INPUT);
pinMode(2,INPUT);
pinMode(3,INPUT);
pinMode(4,INPUT);
pinMode(5,INPUT);
Serial.begin(115200);
}
void loop()
{
int a[6];
for(int i=2;i<8;i++)
{
a*=pulseIn(i, HIGH,1200000);*

  • }*
  • delay(2000);*
  • Serial.println(“ch 1:”+a[0]);*
  • Serial.println(“ch 2:”+a[1]);*
  • Serial.println(“ch 3:”+a[2]);*
  • Serial.println(“ch 4:”+a[3]);*
  • Serial.println(“ch 5:”+a[4]);*
  • Serial.println(“ch 6:”+a[5]);*
    }
    i get the output as
    ?êYÃ+m¡?W­Z®¨?-ÞMüçÿr¨AÝû­Ü{??R
    *²ý¾?ú?}áû||¯ÿ?Û¶ü¿?}©µÿ"ô»=­ö;¬¤?Óãâüü}e9ëÓë©ÿïüNöYsý½¼wAç5å?n<??^73ïó¡È<ifYÛ7°õqÏij~þþ?Ó5ÿÛæא×ç}º* *º z?Ì5­é{áÿ¶eK÷]KO¿ÑG¹Y???Ä* *as»Ä#?Ï?* *8öím­÷]Oÿ<ª?|íoÜÑñ?5¸ûéO?â²G?ÊL¶åìêÐþ®ú³¡ý2¯ÐΫßû5^ßAWïXDµÞÕ?5jéÝ¿ ʯo?÷µ?¶ÏKÿn˲¨ÑÕ©Oü°7Íоßþ÷oZ¿?ÓÛlãíåz»}ü¹?û÷n©ÙÏïé<Ïÿ??®?ÛM?­%ÝÍÛÙ~öîÎx+Úþå¿Eédy?´¿[¬è;* *þʹÆÿVmQ×ï?qÔVv»µ?G¡<˝þå?[¯rñÿˬ?£Ø4ad{mª²¾t®¿¥ÿßb½v÷uÅÔÛ®c?¹?q¶äïl?7³Ñ?­5O¯* *?½bv-SßôÎz?l®øù'Z?úyΫ§®IÂcí½D¿Ù½zêÄómÍÇm·6Ö?>:⡯Á4??÷aÛ* <em>¬­w_õÍiûÍØ1!,¹.ro÷ù?¿ú}!¯þ1èÞÊÿnÿ¶aýþ½!ïÕshLÃ?çú?ø?ÛüÏÝç>îã<b¦á·´Z~ïèÿ÷è. ¬«æÃ?9·|µÈ3ìûÕ;=@û¬¢âß?û¼ª??\ÿÇÛ>Ëxÿq8³à6\Þfê?ïúÛ?ý?ÎRôí)ª??Úã÷ U¯Øv???w_®#KévÓ®e¯ï£å¼cW®îé7?¾¸ý?²? ñ]ø~:?Åë_)þ¶æ« ð?g}-Ka?ø???å×ï¥y;½~k?ïs§)¥ò???ÇíçèïfGüÞ¶ûýûúãɶI%ûû¸yú=í¦nÞ?wéÙ÷ÿçý¶Øéîý»Ïbi7GßG;üuÆð¼¿ohÒ?ã}/mþ?¤¾¸OWK~þêÿÿÇì?gÑ|j;«'½ùmö?«VݯÖÓëN#ö7þ¾ô[ÖýµÑr7gÈâçýð>D(ÒÃoÞeng©g?!gõî}ÏM_ÈüÚƽ{ö?¼õ©úqùýJÿÚûÀÞKÝ?;qwùíaótæþr¿_ÿ]Ææ ûgç7ÓGÝ´ª?×þ÷Ü®WÏ2·íõÝâ??µïoÞû®¦®ðÓ­?o)ÔAQÕ¡³Ýì?_µ÷XùÈ×Ùü3ÙzNko¹9aCZýßhÞöÄëB}<Ùò;ý;üz;û²µz??NЏÝa½=Àçüx³ïÏâ5ÓÍÿ?Û°»,à´?výÿUù??þîFzòë÷?ô§û/Oý¼½ìþ{·ÿ*ôþÝϵ·yö?úúè3jÁÙ­yº4ïD?ù?Qkâ?];xa?þþÏ»í­2,véíã?ôçúÂ{ýó?Búw~ðî·ßÿۏn£Íé©?R+;sx?å´´?ÃsُÛÛî×þHrìyqÙq?ÛOâsÜÙÖ÷"§cRzweÕ?ýUè·|UýÖõ§õ©Z£z?-âzÂUô«½?êî]ugÁ»û?¶}ªo~·º×úÏóß??e¶9?D¶Û|ÿneµß?ÕÉÆnÕ?ß®(¯÷ý±ÇýµÛ³ûíÇ}FîËý×éfiÞû?½m>ÿ>ó?ñáÍ»ë?È®Á-?Rõsö]üö[?¶,ÜñÛu÷뼿,ãþ+üËÍÝ;´ùZ’k®KéïñöûnþíÂð?ó?Mÿ{f?Yöç?ÏåÎÖ5ï£[õµÖe>ÍxÓKòúØ (×/§Y?ÏInkëP’°ð­­½_ìtxRa_3?pk $iY·En¤Ú«{O¶?ëµ³ðîÏ?v߯?Ýüò÷heÝ>1ð(EsK¿Ó¹Þñ·Åÿ:?ý·Õâ~TÈ?7Y>??Uá¾[¿oSða{zvÿªs»ßs?×þ~^=¾}9îm?ü-/ÿÍȶÿ?¯zQ½Î¹?Ý¿üâoäØ?ïÏ1ðòyÓ/tõ5ÿþÕsÜw?J¦??5§\¼J^£Ù?¼þ??Ù·sõ¯öìþ\öÛ~³o{9_ïϯÙÍ\z?_fß_Ìu)2íwÏ /Láß?ì®aµõ{5¿}?v­ÿ¿g?Û¾µÏâÿ/¸Í¬!zúLk±?êÐö|Q®sc¿.|ü»Çÿ?|Ãú??Wl?õ ïÙ?p8°c
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#2 
  pinMode(0,INPUT);
  pinMode(1,INPUT);

Which type of Arduino are you using? On the Uno (and some others, I think) pins 0 and 1 are connected to the serial monitor port, so you can’t use them for other purposes. Try moving those two connections to other pins.

#3

Is your speed on the serial monitor set correctly?
Serial.begin(115200);

When do you actually read the data?
Typically one uses things like:

if (Serial.available() >5){  // 6 bytes received?
//read 6 bytes
a[0] = Serial.read();
a[1] = Serial.read();
a[2] = Serial.read();
a[3] = Serial.read();
a[4] = Serial.read();
a[5] = Serial.read();

and mix in your pulse code as needed.

#4

i am using UNO only i have even changed the pin connections…if figured it and tried it still it is not working i have set the baud rate also correctly 115200 .

i am reading the PPM signals from the RC receiver i use transmitter to give my input signal.i am not using my serial communication to give the input.

#5

Basic test: add a print statement after Serial.begin()

Serial.begin(115200);
Serial.println("program started");

Can you see "program started" on the serial monitor before the strange output?

#6

Yeah its gettin printed…!!but only when i want to display my input value it is printing such strange symbols,…!!

#7

OK, so baud rate OK.

Try changing your print statements in loop() into two statements:

// Serial.println("ch 1:"+a[0]);
Serial.print("ch 1: ");
Serial.println(a[0]);
#8

Ah - you need this
a[i-2]=pulseIn(i, HIGH,1200000);
you're missing the array reference.
[i-2] because you declare the array as 6 bytes, a[0] to a[5], but your loop is from 2 to7.

#9

this would be my code

for(int i=2;i<8;i++)
{
a*=pulseIn(i,HIGH,1200000);*
}[/color]
which means a[2] will hold my first channel 1 input based on my connections…!!

#10

@hack scribble

ill try that and let you know bro..!!thankyou for your reply :slight_smile:

#11

int a[6]; <<< this declares space in memory for a[0], a[1], a[2], a[3], a[4], a[5]
for(int i=2;i<8;i++)
{
a=pulseIn(i, HIGH,1200000); <<< this needs to be a[i-2] to store into a[0], a[1], a[2], a[3], a[4], a[5]
}
so you can then print them:
Serial.println(“ch 1:”+a[0]);
Serial.println(“ch 2:”+a[1]);
Serial.println(“ch 3:”+a[2]);
Serial.println(“ch 4:”+a[3]);
Serial.println(“ch 5:”+a[4]);
Serial.println(“ch 6:”+a[5]);

#12