UniCT-ARSLab/LWN-Simulator: A LoRaWAN nodes’ and network simulator that works with a real LoRaWAN environment (such as Chirpstack) and equipped with a web interface for real-time interaction. (github.com)
I suggest this LoRaWAN nodes’ simulator to simulate a LoRaWAN Network, equipped with a web interface. It allows communication with a real infrastructure LoRaWAN or ad-hoc infrastructure, such as Chirpstack.
It is equipped with a Web GUI to manage the simulator instance and virtual nodes/gateways (also the real gateways).
We are using it in our company to simulate a couple of LoRaWAN nodes with virtual and real gateways!