serial TX issue

bnikkel

Hello everyone,

I have a JDY-40 2.4ghz module. i am having zero luck sending commands to it using the flip but i am receiving "START" from it when i first connect power.
I can communicate with the module perfectly using the arduino terminal, 9600 baud with both NL and CR after sending AT+BAUD command
but i just cant seem to figure out what im missing with the propeller? Thanks in advance for any help.

#include "simpletext.h"
#include "simpletools.h"                      // Include simple tools
#include "fdserial.h" 



fdserial *program;

int m = 0;

//-----------------------------------------------------------------


int main()
{

pause(100); 
  
                         // RX-TX  
   program = fdserial_open(0, 2, 0, 9600);     // p0-p1  transmit to receiver
     pause(100); 

print("RUNNING\n");  


pause(100); 



//dprint(program, 'AT+BAUD');    //change text

//fdserial_txChar(program, "AT+BAUD\r\n"); //Command byte

//dprint(program, "%s%d%d", "AT+BAUD", 13, 10);    //change text 
//dprint(program, "%s%c%c", "AT+BAUD", 0x0D, 0x0A);    //change text 
//dprint(program, "AT+BAUD%c%c", 13, 10);   //send specific text
//dprint(program, "AT+BAUD%c%c", 0x0D, 0x0A);   //send specific text



fdserial_txChar(program, "AT+BAUD"); //Command byte
fdserial_txChar(program, 0x0D); //Command byte
fdserial_txChar(program, 0x0A); //Command byte


while(1)
{
  m = fdserial_rxChar(program);      
  print("m= %c,  %d,\n",m, m);              
  pause(100);   
}  



int i=0;
 
for( i=0; i<=17; i++ )
{ 
  m = fdserial_rxChar(program);      
  print("m= %c,  %d,\n",m, m);              
  pause(100);      
}  

print("DONE!\n");     
}


//---------------------------------------------------------------

Duane Degn

I'd suggest adding a carriage return after the newline.

print("RUNNING\n\r");

Duane Degn

I don't remember which is supposed to come first. The new line or carriage return. You might want to try the statement below if my first suggestion doesn't work.

print("RUNNING\r\n");

Duane Degn

It's \r\n

I found this on page 4 of the datasheet.

the AT instruction need to end the symbol \r\n

bnikkel

hi Duane, the "running" is only being sent to my terminal so i know its running not to the module. ive tried \r\n which i beleive is the same as 13,10, or 0x0D,0x0A in hex.
i have tried so many combinations i have lost count. i am also able to send and receive with the propeller using it as just a wireless transmitter, but i can not send to it when i try to program it. if that makes sence?

JonnyMac

fdserial_open(0, 2, 0, 9600);     // p0-p1  transmit to receiver

This actually defines P2 as the TX pin.

Ltech

gust a guess,

inverted serial communication?

program = fdserial_open(0, 2, 1 , 9600);

bnikkel

Hi Jonny Mac i started with pin1 as TX then switched to pin2 to make sure it wasnt the pin.

Ltech, if i invert will that also change the RX? i know i can currentlty receive with (0,2,0,9600)?

bnikkel

from arduino terminal i can send "AT+BAUD" with NL and CR at the end and it works fine

iseries

This is very simple module to communicate with. I assume you only have one of these.

Pin 12 needs to be grounded to send AT commands and the commands need to be ended with CR/LF or \r\n

dprint(program, "AT+BAUD\r\n");

Mike

bnikkel

hello Iseries, i have 10 of them and with pin 12 ungrounded using two flip modules i can send back and forth just fine, when i ground the "SET" pin and try to send the module an AT command i get no response back. i have tried dprint(program, "AT+BAUD\r\n"); but get nothing back.

bnikkel

something is different from how the arduino terminal and the propeller send out the command

iseries

Serial is serial and they both do the same thing. Show me the code on the Arduino side.

Mike

bnikkel

I just figured it out, but i have no idea why it is so??

#include "simpletext.h"
#include "simpletools.h"                      // Include simple tools
#include "fdserial.h" 


// SET pin pulled low to program ID
// SET pin pulled high for normal operation


fdserial *program;

char m = 0;
char trash = 0;


//-----------------------------------------------------------------


int main()
{

//low(10);
pause(100); 
  
                         // RX-TX  
   program = fdserial_open(0, 1, 0, 9600);     // p0-p1  transmit to receiver
     pause(100); 

print("RUNNING\r\n");  
high(7);

pause(1000); 




writeChar(program, 0x41); 
writeChar(program, 0x54); 
writeChar(program, 0x2B); 
writeChar(program, 0x42); 
writeChar(program, 0x41); 
writeChar(program, 0x55); 
writeChar(program, 0x44); 
writeChar(program, 0x0D); 
writeChar(program, 0x0A); 
 


while(1)
{
  m = fdserial_rxChar(program); 
      
  print("receive= %c,\n", m);  
           
  pause(100); 
    
}  






  
//high(10);  
print("DONE!\n");     
}


//---------------------------------------------------------------

bnikkel

writeChar gave me a response back

bnikkel

with the arduino terminal you simply write AT+BAUD and hit send

JonnyMac

I believe the Arduino terminal doesn't send any characters until you press Send. The benefit is that you don't have to worry about character timeouts -- this may be causing you problems with the Simple IDE terminal (I'm a Spin guy, so I don't use Simple IDE myself).

iseries

The problem is that the dprint function is converting \n into \r character for you. It's a feature.

I ran across this before.

The fdserial_txChar function is fine and will transmit the characters as is.

Mike

iseries

Try this:

char Data[] = "AT+BAUD\r\n";

for (int i =0;i<strlen(Data);i++)
  fdserial_txChar(program, Data[i]);

Mike

dgately

fdserial_txChar(program, "AT+BAUD"); //Command byte

I think that fdserial_txChar(...) Only writes the single "A" character to the program device... "T+BAUD" just get dropped into the bit bucket. (Just my guess, as you've seemed to have fixed the problem by sending out the characters one at a time).


dgately

bnikkel

Iseries, your code loop worked i just had to move the "int i" declaration before the loop for some reason, i kept getting the error below.

JDY-40 PROGRAM (1).c:72:1: error: 'for' loop initial declarations are only allowed in C99 mode

dgately

You can keep the "for(int i = 0; i<strlen(Data);i++)" if you include "-std=c99 " in SimpleIDE's "Other Compiler Options" field.


dgately

bnikkel

Dgately, thank you, i added it and it is working

bnikkel

here is the final code i am using to talk to all the chips.

#include "simpletext.h"
#include "simpletools.h"                      // Include simple tools
#include "fdserial.h" 


// SET pin pulled low to program ID
// SET pin pulled high for normal operation
//added "-std=c99 " in SimpleIDE's "Other Compiler Options" field.

fdserial *program;

char m = 0;

//int i=0; 

char baud[] = "AT+BAUD\r\n";//BAUD RATE
char rfid[] = "AT+RFID\r\n";//WIRELESS ID
char dvid[] = "AT+DVID\r\n";//DEVICE ID
char rfc[] = "AT+RFC\r\n";//CHANNEL
char powe[] = "AT+POWE\r\n";//TRANSMIT POWER
char clss[] = "AT+CLSS\r\n";//MODE



//-----------------------------------------------------------------


int main()
{

//low(10);
pause(100); 
  
                         // RX-TX  
   program = fdserial_open(0, 1, 0, 9600);     // p0-p1  transmit to receiver
     pause(100); 

print("RUNNING\r\n");  


pause(1000); 



for (int i = 0;i<strlen(baud);i++)
  fdserial_txChar(program, baud[i]);

while(m != 10)
{
  m = fdserial_rxChar(program);       
  print("%c", m);             
  //pause(100);     
}  
m = 0;
pause(100); 





for (int i = 0;i<strlen(rfid);i++)
  fdserial_txChar(program, rfid[i]);

while(m != 10)
{
  m = fdserial_rxChar(program);       
  print("%c", m);             
  //pause(100);     
}  
m = 0;
pause(100);





for (int i = 0;i<strlen(dvid);i++)
  fdserial_txChar(program, dvid[i]);

while(m != 10)
{
  m = fdserial_rxChar(program);       
  print("%c", m);             
  //pause(100);     
}  
m = 0;
pause(100);





for (int i = 0;i<strlen(rfc);i++)
  fdserial_txChar(program, rfc[i]);

while(m != 10)
{
  m = fdserial_rxChar(program);       
  print("%c", m);             
  //pause(100);     
}  
m = 0;
pause(100);





for (int i = 0;i<strlen(powe);i++)
  fdserial_txChar(program, powe[i]);

while(m != 10)
{
  m = fdserial_rxChar(program);       
  print("%c", m);             
  //pause(100);     
}  
m = 0;
pause(100);  





for (int i = 0;i<strlen(clss);i++)
  fdserial_txChar(program, clss[i]);

while(m != 10)
{
  m = fdserial_rxChar(program);       
  print("%c", m);             
  //pause(100);     
}  
m = 0;
pause(100);  
  
  
 
 
print("DONE!\n");     
}


//---------------------------------------------------------------