Setup

Server

Docker Compose Setup

I use docker with the itzg/minecraft-server Docker image.

services:
  minecraft:
    image: itzg/minecraft-server
    ports:
      - "25565:25565"     # Minecraft Java Port
      - "19132:19132/udp" # Bedrock/Geyser Port
      - "25575:25575"     # RCON port
      - "4711:4711"
    environment:
      EULA: "TRUE"
      TZ: "Europe/Berlin"
      TYPE: PAPER
      VERSION: "1.21.8"
      MEMORY: "1G" 
      SPAWN_PROTECTION: 0
      ENABLE_RCON: "true"
      RCON_PASSWORD: "somepassword"
      RCON_PORT: 25575  # default Minecraft RCON port, can be changed

    volumes:
      - ./data:/data
      - ./plugins:/plugins
    memswap_limit: "2G"
    deploy:
      resources:
        limits:
          memory: "2G"
          cpus: "2"
        reservations:
          memory: "2G"  
          cpus: "0.75"

Open Firewall Ports

Assure that the Raspberry Juice port on the Minecraft server is opened up on your firewalls for incoming traffic.

Setup Raspberry Juice Plugin

Download plugin from https://www.spigotmc.org/resources/raspberryjuice.22724/
Copy it into ./plugins directory on Docker host.

Setup Development Workstation

Install the Raspberry Juice Python module. Better in a venv, but to keep it easy globally like below:

pip install mcpi

Now write some python script that connects to your remote minecraft server and execute it:

from mcpi.minecraft import Minecraft
from mcpi import block

# connect to the server
mc = Minecraft.create(address="192.168.2.151", port=4799)

# get all players
player_ids = mc.getPlayerEntityIds()
players = {}
print("Connected players:")
for pid in player_ids:
    name = mc.entity.getName(pid)
    players[pid] = name
    print(f" {pid}: {name}")

# ask which player to give blocks
choice = int(input("Enter the ID of the player to receive 10 diamond blocks: "))

if choice not in players:
    print("Invalid player ID!")
else:
    # get player position
    pos = mc.entity.getPos(choice)

    # place 10 diamond blocks in a line in front of the player
    for i in range(10):
        mc.setBlock(pos.x + i + 1, pos.y, pos.z, block.DIAMOND_BLOCK)

    print(f"Placed 10 diamond blocks in front of {players[choice]}!")

Reference

[1]