Dear ,
I want to use LTE_M of nRF9160 DK to POST to my webserver
Do you have any suggestions?
Thanks,
Regards
hng
Dear ,
I want to use LTE_M of nRF9160 DK to POST to my webserver
Do you have any suggestions?
Thanks,
Regards
hng
Hi,
Please see my response here: https://devzone.nordicsemi.com/f/nordic-q-a/46094/how-to-make-http-post-no-libcurl
Regards,
Vidar
Thank Vidar,
I will try it
Regards,
hng
It works, just fixed a little bit:
/******************************************"**************************************/
#define MAXLINE 4096
#define HTTP_HOST "142.xx.xx.192" //my webserver
#define HTTP_PORT 80
#define HTTP_PATH "/"
#define TEST_STRING "Hello from nRF9160 DK"
#define POST_TEMPLATE "POST %s? HTTP/1.1\r\n"\
"Host: %s\r\n"\
"Connection: keep-alive\r\n"\
"Content-type: application/x-www-form-urlencoded\r\n"\
"Content-length: %d\r\n\r\n"\
"%s"
/************************************************************************/
void app_http_post()
{
//int err;
struct sockaddr_in local_addr;
struct addrinfo *res;
local_addr.sin_family = AF_INET;
local_addr.sin_port = htons(0);
local_addr.sin_addr.s_addr = 0;
int err = getaddrinfo(HTTP_HOST, NULL, NULL, &res);
printk("getaddrinfo err: %d\n\r", err);
((struct sockaddr_in *)res->ai_addr)->sin_port = htons(HTTP_PORT);
char send_buf[MAXLINE + 1];
int send_data_len_post = snprintf(send_buf,
500, /*total length should not exceed MTU size*/
POST_TEMPLATE, HTTP_PATH,
HTTP_HOST, strlen(TEST_STRING),
TEST_STRING);
printk("send err: %d\n\r", send_data_len_post);
int client_fd = socket(AF_INET, SOCK_STREAM, 0);
printk("client_fd: %d\n\r", client_fd);
err = bind(client_fd, (struct sockaddr *)&local_addr,
sizeof(local_addr));
printk("bind err: %d\n\r", err);
// connect
err = blocking_connect(client_fd, (struct sockaddr *)res->ai_addr,
sizeof(struct sockaddr_in));
printk("connect err: %d\n\r", err);
//send
blocking_send(client_fd, send_buf, send_data_len_post, 0);
k_sleep(1000);
printk("\n\r HTTP POST Finished. \n\r");
close(client_fd);
}
Thanks so much
Regards,
hng
Thanks for sharing the solution here.
Thanks for sharing the solution here.
DearVidar Berg
I tried to run this http post in a loop
first, i will check the LTE_M signal "AT+CEREG?"
It returns:
Checking LTE_M signal............. +CEREG: 0,5,"765D","0110C303",7 OK Found the LTE_M signal Closing socket find LTE_M signal........... Checking LTE_M signal............. +CEREG: 0,5,"765D","0110C303",7 OK Found the LTE_M signal Closing socket find LTE_M signal........... Checking LTE_M signal............. +CEREG: 0,5,"765D","0110C303",7 OK Found the LTE_M signal Closing socket find LTE_M signal........... Checking LTE_M signal............. +CEREG: 0,5,"765D","0110C303",7 OK Found the LTE_M signal Closing socket find LTE_M signal........... Checking LTE_M signal............. +CEREG: 0,5,"765D","0110C303",7 OK Found the LTE_M signal Closing socket find LTE_M signal........... Checking LTE_M signal............. +CEREG: 0,5,"765D","0110C303",7 OK Found the LTE_M signal Closing socket find LTE_M signal........... Checking LTE_M signal............. +CEREG: 0,5,"765D","0110C303",7 OK Found the LTE_M signal Closing socket find LTE_M signal........... Checking LTE_M signal............. Closing socket Couldnt find LTE_M signal........... Checking LTE_M signal............. Closing socket Couldnt find LTE_M signal........... Checking LTE_M signal.............
After 7times, "AT+CEREG?" return NOTHING!
Why is the problem, the buffer is full? or something wrong in my code?
Plz help me.
Thanks so much
Regards,
hng
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.
Dear Vidar Berg
I had 2s delay between
How long should I add ?
Thanks for fast responds,
Regards,
hng
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
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