How do a develop code for the BL5340?

Unlike previous generations of Nordic based Laird BLE modules, the BL5340 does not support out Smartbasic programming language.  Development is therefore done in C using Zephyr RTOS or the Nordic nRF Connect SDK.

For more information on developing for the nRF53 based BL5340 modules see the following links

BL5340 Series - Multi-Core NFC, Bluetooth 5.2 + 802.15.4 WiFi Module (lairdconnect.com)

Welcome to the nRF Connect SDK! — nRF Connect SDK 1.6.99 documentation (nordicsemi.com)

Ezurio (formerly Laird Connectivity) BL5340 DVK — Zephyr Project Documentation