Lwm2M Bootstrap

In this tutorial, you'll learn about LwM2M Bootstrap Sequence Fails. We cover key concepts, practical examples, and best practices.

The Problem

LwM2M client bootstrap sequence with the bootstrap server fails.

Quick Fix

Wrong

// Client skips bootstrap phase

Client cannot connect to LwM2M server (no security config).

Right

# Anjay bootstrap configuration
const anjay_configuration_t config = {
  .endpoint_name = 'urn:dev:001:my-device',
  .in_buffer_size = 4000,
  .out_buffer_size = 4000
};

anjay_t *anjay = anjay_new(&config);

// Install bootstrap security
anjay_bootstrap_security_object_install(anjay);

// Configure bootstrap server
anjay_bootstrap_security_add_instance(
  anjay, 0, false,
  'coap://bootstrap-server:5683', false, NULL);

// Initiate bootstrap
anjay_bootstrap(anjay);  // Client requests bootstrap

// After bootstrap, client has server config
anjay_start(anjay);

// Bootstrap process:
// 1. Client requests bootstrap from bootstrap server
// 2. Bootstrap server writes Security (0) and Server (1) objects
// 3. Client switches to LwM2M server

Client receives security and server configuration from the bootstrap server.

Prevention

Bootstrap modes: factory bootstrapping (pre-provisioned), bootstrap server (network-based). The bootstrap server uses port 5685 (coap://bootstrap-server:5685). After bootstrap, the client connects to the LwM2M server. Bootstrap can update objects, instances, and resource values.

DodaTech engineers apply these same patterns across Doda Browser, DodaZIP, and Durga Antivirus Pro for production IoT reliability.

FAQ