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)
Laird Connectivity BL5340 DVK — Zephyr Project Documentation