Prof. Christian Holm is giving an introduction to electrostatics algorithms. This is a good starting point if you want to take advantage of the corresponding solvers implemented in ESPResSo. This talk was part of the ESPResSo Summer School 2020, a course about the ESPResSo simulation package.
Institute for Computational Physics: https://www2.icp.uni-stuttgart.de/~icp/Main_Page
ESPResSo homepage: https://www.espressomd.org