serial TX issue

bnikkel · 2020-03-26 17:49

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 · 2020-03-26 18:57

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

print("RUNNING\n\r");

Duane Degn · 2020-03-26 19:02

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 · 2020-03-26 19:06

It's \r\n

I found this on page 4 of the datasheet.

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

bnikkel · 2020-03-26 19:48

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 · 2020-03-26 20:17

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

This actually defines P2 as the TX pin.

Ltech · 2020-03-26 20:18

gust a guess,

inverted serial communication?

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

bnikkel · 2020-03-26 20:29

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 · 2020-03-26 20:37

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

iseries · 2020-03-26 20:44

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 · 2020-03-26 20:50

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 · 2020-03-26 20:51

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

iseries · 2020-03-26 20:59

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

Mike

bnikkel · 2020-03-26 21:04

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 · 2020-03-26 21:04

writeChar gave me a response back

bnikkel · 2020-03-26 21:05

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

JonnyMac · 2020-03-26 21:20

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 · 2020-03-26 21:24

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 · 2020-03-26 21:29

Try this:

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

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

Mike

dgately · 2020-03-27 04:31

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 · 2020-03-27 12:27

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 · 2020-03-27 14:57

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 · 2020-03-27 15:05

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

bnikkel · 2020-03-27 15:08

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");     
}


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

serial TX issue

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