nRF9160 DK HTTP POST to my Webserver

[Hoang]

Dear , 

I want to use LTE_M of nRF9160 DK to POST to my webserver

Do you have any suggestions?

Thanks, 

Regards

hng

[Vidar Berg]

I believe a bug in the BSD library causes this. I get the "no memory" error when call socket send in a loop without any delay in-between. I have reported this internally. A workaround, for now, is to add a delay between each post request. 

[Hoang]

Dear Vidar Berg

I had 2s delay between

How long should I add ?

Thanks for fast responds, 

Regards, 

hng

[Vidar Berg]

A 2-second delay should be sufficient. Can you try to increase the stack sizes in your project *.conf file?

e.g.,

CONFIG_MAIN_STACK_SIZE= 8192

CONFIG_HEAP_MEM_POOL_SIZE=8192

[Hoang]

Dear Vidar Berg

I tried, the same thing happened  

int nRF_LTE_check(void)
{
    int err;
    const char *ATREG="AT+CEREG?"; 
	int at_socket_fd = socket(AF_LTE, 0, NPROTO_AT);
    printk("Checking LTE_M signal.............\n\r");

	if (at_socket_fd < 0) {
		err = 1; 
	}
    else {
    int bytes_written = send(at_socket_fd, ATREG, strlen(ATREG), 0);
    if (bytes_written > 0) {
	int r_bytes = blocking_recv(at_socket_fd, recv_buf,sizeof(recv_buf), MSG_DONTWAIT);
	if (r_bytes > 0) {
	printk("%s", recv_buf);
    if (recv_buf== LTEfound) 
       {
      err = 0; 
      printk("Found LTE_M signal \n");
        }
    else {
       printk("Couldnt find the LTE_M signal \n");
       err =1;
        }
 }
  }
          }
	printk("Closing socket\n\r");
    (void)close(at_socket_fd);
    return err; 
}

my loop: 

#include <zephyr.h>
#include <net/socket.h>
#include <misc/printk.h>
#include <zephyr/types.h>
#include <math.h>
#include <uart.h>
#include <soc.h>
#include <gpio.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>     /* atof */
#include <autoconf.h>

void main (void)
{
  printk("Test is starting \n"); 

   
    
    while(1){

   
      int lte_err= nRF_LTE_check();
      if(lte_err==0){ printk("  find LTE_M signal........... \n"); }
      else{ printk(" Couldnt find LTE_M signal........... \n");}
      k_sleep(2000);
   
    }
   
}

and my prj.conf

CONFIG_SERIAL=y
CONFIG_TRUSTED_EXECUTION_NONSECURE=y
CONFIG_UART_INTERRUPT_DRIVEN=y
CONFIG_UART_1_NRF_UARTE=y
CONFIG_UART_2_NRF_UARTE=y

CONFIG_GPIO=y

CONFIG_NETWORKING=y
CONFIG_NET_BUF_USER_DATA_SIZE=1
CONFIG_NET_SOCKETS_OFFLOAD=y
CONFIG_NET_SOCKETS=y
CONFIG_NET_SOCKETS_POSIX_NAMES=y
CONFIG_NET_RAW_MODE=y
CONFIG_BSD_LIBRARY=y


CONFIG_STDOUT_CONSOLE=y

CONFIG_TEST_RANDOM_GENERATOR=y

CONFIG_LOG=n
CONFIG_LOG_DEFAULT_LEVEL=4
#CONFIG_HEAP_MEM_POOL_SIZE=1024
CONFIG_MAIN_STACK_SIZE= 8192
CONFIG_HEAP_MEM_POOL_SIZE=8192


# LTE link control
#CONFIG_LTE_LINK_CONTROL=y
CONFIG_UART_2_NRF_TX_BUFFER_SIZE=1024

[Vidar Berg]

Can you upload your entire project directory here so I can try to debug it? Some of the variable definitions are missing from the code snippets above.