CherrySim
CherrySim is not yet open source. We are working on it, stay tuned for updates.
CherrySim is our new simulator that is based on our FruityMesh code. It is written entierly in C and C++. You will notice a few #ifdef statements in the FruityMesh codebase which check if the simulator is enabled.
Functionality and Features
Our new simulator abstracts the SoftDevice and creates a communication layer between the nodes. It simulates all nodes in short timesteps and can even display a visualization of the mesh.
It supports terminal input and output for all nodes, pipe communication for exchanging data efficiently with other applications, pseudo randomness to deterministically debug a problem, battery usage estimation, google test integration, random configurations or user defined positions, etc,…
We use our simulator a lot for: - Unit and System Testing - Estimating battery usage - Implementing new features - Evaluating and improving mesh behaviour - Debugging implementation problems
Instances
CherrySim has only one instance that is supposed to simulate many instances of FruityMesh. Hence FruityMesh must be written in a way, that code itself has no state variables. No global or function static variables are allowed. Every variable that needs to be saved from function call to another needs to be a part of class as instances of classes in CherrySim are created for every node.