LwM2M Client Registration Fails — Complete Guide

lwm2m_client.register()  # No endpoint or server URL

# Anjay LwM2M client example
#include <anjay/anjay.h>
#include <anjay/security.h>
#include <anjay/server.h>

const char *endpoint_name = 'urn:dev:001:my-device';

int main(void) {
  const anjay_configuration_t config = {
    .endpoint_name = endpoint_name,
    .in_buffer_size = 4000,
    .out_buffer_size = 4000
  };
  
  anjay_t *anjay = anjay_new(&config);
  
  // Configure security object (LwM2M 1.0)
  anjay_security_object_install(anjay);
  anjay_server_object_install(anjay);
  
  // Add server with bootstrap or security instance
  anjay_security_add_instance(
    anjay, 0, true,'coap://lwm2m-server:5683', false, NULL);
  
  // Start the client
  anjay_start(anjay);
  
  // Run event loop
  while (true) {
    anjay_sched_run(anjay);
  }
}