v1.0.4

1. Fix the bugs in the Arduino codes due to code reformat.
2. Add "main_sim_txrx.m" which calls the simulation functions used in the early stage of the project. The simulated data has the same structure as the experimental data, and the two share the same decoder. However, this has nothing to do with the experimental results, but provide a way to get people familiar with the data and the decoder.