You can play PistonMC by adding the server in the Minecraft launcher.
On Minecraft Bedrock Edition, open the Minecraft launcher or Minecraft app. Go to the “Servers” tab and press “Add Server.” Enter the PistonMC IP Address mc.pistonmc.comin the “Server Address” and the PistonMC port 19132 in the “Port.” Then press “Save” and start playing.