Monitor and failsafe automation for the Draconic Evolution reactor, energy storage, and pocket remote. Compatible with Draconic Evolution for Minecraft 1.20.1 and CC:Tweaked.
- Live readout of status, temperature, field strength, energy saturation, fuel level, generation rate
- Automated input-gate regulation to hold field strength at a configurable target %
- Touchscreen buttons to adjust output flux gate ±1k / ±10k / ±100k RF/t
- Toggle between AUTO (algorithm-controlled) and MANUAL input gate modes
- Fuel ETA — time remaining at current consumption rate
- Uptime and cumulative RF generated counters
- Failsafe indicator — flags when the reactor's built-in failsafe is active
- Battery-linked hysteresis control — stops the reactor when the energy core is full, restarts it when storage drains to a low-water mark (conserves fuel significantly)
- Automatic emergency shutdown when:
- Field strength drops below threshold (default 15%) → emergency recharge
- Temperature exceeds limit (default 8000 °C) → cools down and restarts
- Fuel drops below 10%
- Auto-reactivation after emergency cool-down
- Peripheral auto-reconnect if a cable is unplugged and re-inserted
- Timestamped event log written to
drmon.log - Wireless remote support (ender modem / advanced wireless modem)
- Live readout of current stored RF, max capacity, and fill percentage
- Colour-coded progress bar (green > 75%, orange > 25%, red below)
- Net transfer rate computed from energy delta — shows charge (+) or drain (−)
- Time-to-full / time-to-empty estimate
- Displays reactor status, temperature, field %, fuel %, generation rate, chaos saturation
- Keyboard shortcuts: C charge · A activate · S stop · R reboot
- Polls every 10 seconds; shows a "NO SIGNAL" indicator if the reactor computer goes quiet
| Item | Qty | Notes |
|---|---|---|
| Advanced Computer | 1 | Runs drmon.lua |
| Draconic Reactor (fully built) | 1 | One stabiliser must be directly adjacent to the computer |
| Flux Gates | 2 | One input (energy injector side), one output (energy storage side) |
| Advanced Monitor | 9 | Arranged in a 3×3 grid |
| Wired Modem | 4 | One on each: computer, input gate, output gate, monitor array |
| Networking Cable | — | Connects the four wired modems |
| Ender Modem / Advanced Wireless Modem | 1 (optional) | For pocket remote access |
| Advanced Pocket Computer | 1 (optional) | Runs pocket.lua |
| Energy Pylon (Draconic Evolution) | 1 (optional) | For battery-linked reactor control |
Why can't I use ender modems instead of cables?
peripheral.wrap()only works over the wired modem/cable network. Ender modems carryrednetmessages only — they cannot proxy peripheral API calls. The reactor computer, flux gates, monitor, and energy pylon must be connected via wired modems and cables. Ender modems are the right choice for the pocket remote, where only message-passing is needed.
┌─────────────────────────────────────────────────────────┐
│ │
│ [Monitor 3×3] │
│ │ Wired Modem │
│ └──── cable ──── cable ──── cable ────┐ │
│ │ │
│ [Flux Gate IN] ─ Wired Modem ─ cable ─ [Wired Modem] │
│ │ │
│ [Flux Gate OUT] ─ Wired Modem ─ cable ────┘ │
│ │ │
│ [Advanced Computer] │
│ │ │
│ [Reactor Stabiliser] │
│ (directly adjacent) │
│ │
│ [Energy Pylon] ─ Wired Modem ─ cable ──┘ (optional) │
└─────────────────────────────────────────────────────────┘
- The reactor stabiliser must touch a side of the advanced computer directly — no modem needed for it.
- All other peripherals connect via a shared wired modem/cable network.
- Turn on each wired modem after placing it (right-click). The peripheral names (
flux_gate_0,monitor_0, etc.) appear once the modem is active. - If you add an ender modem to the computer, the pocket remote gains access automatically.
Set up a 3×3 grid of advanced monitors all touching. Place a wired modem on any non-front face of the arrangement and connect it to the cable network. The monitor will appear as a single large display.
Recommended text scale: 0.5 (set with monitor <side> set textScale 0.5 or right-clicking the monitor and using the in-game settings) — gives enough rows to show all display sections including the battery panel.
-
Boot the advanced computer and run:
pastebin get mgF6RZFQ startup startup(or replace the pastebin code with the
install.luafrom this repo if self-hosting) -
The installer will:
- Download
drmon.lua,bat.lua, andlib/f.lua - Auto-detect the reactor side, flux gates, and monitor
- Ask which flux gate is the input gate (the one connected to the energy injector)
- Optionally ask for the energy pylon peripheral name (for battery-linked control)
- Save
config.txtand launch the program
- Download
-
The program launches automatically on every reboot.
Edit the top of bat.lua to match your setup:
local pylonSide = "back" -- side the energy pylon is on
local monitorSide = "left" -- side the monitor is onThen copy bat.lua to the computer and run it:
> bat
To auto-run on boot, rename or copy it to startup.
On an advanced ender pocket computer:
pastebin get PUWxdYWY startup
startup
(or copy pocket.lua to the pocket computer)
The pocket computer will search for a wireless modem automatically. Make sure the reactor computer also has an ender modem attached and rednet open on it (the wireless() coroutine in drmon.lua handles this automatically).
Settings are stored in config.txt (one value per line). Re-running install.lua regenerates this file interactively. You can also edit it directly:
| Line | Key | Default | Description |
|---|---|---|---|
| 1 | version | 5.1 |
Config format version |
| 2 | monType | reactor |
reactor or bat |
| 3 | reactorSide | back |
Side the reactor stabiliser is on |
| 4 | igateName | — | Peripheral name of the input flux gate |
| 5 | ogateName | — | Peripheral name of the output flux gate |
| 6 | monName | — | Peripheral name of the monitor |
| 7 | oFlow | 0 |
Initial output gate flow (RF/t) |
| 8 | iFlow | 900000 |
Initial input gate flow (RF/t) |
| 9 | autoInputGate | 1 |
1 = AUTO mode, 0 = MANUAL mode |
| 10 | batteryMode | 0 |
1 = battery-linked control ON |
| 11 | batteryHighPct | 95 |
Stop reactor when storage reaches this % |
| 12 | batteryLowPct | 25 |
Restart reactor when storage drains to this % |
| 13 | batteryPylonName | — | Peripheral name of the energy pylon |
These are not in config.txt; edit the file directly:
local targetStrength = 50 -- target field strength %
local maxTemperature = 8000 -- °C: triggers emergency shutdown
local safeTemperature = 3000 -- °C: safe temperature to restart after cooling
local lowestFieldPercent = 15 -- %: emergency-charge field floor
local activateOnCharged = 1 -- 1 = auto-activate when fully charged┌───────────────────────────────┐
│ Reactor v5.1 RUNNING │ ← status (colour-coded)
│ │
│ Generation 12,345 rf/t│
│ │
│ Temperature 4,231 C │
│ Output Gate 50,000 rf/t│
│ < << <<< >>> >> > │ ← output gate buttons
│ Input Gate 22,000 rf/t│
│ AU │ ← AUTO/MANUAL toggle (tap AU/MA)
│ Energy Sat. 83.20% │
│ ████████████████░░░░░░░░░░░░ │
│ │
│ Field T:50% 73.45% │
│ ████████████████████░░░░░░░░ │
│ │
│ Fuel 89.23% 12h 04m │ ← fuel % + time-to-empty
│ ██████████████████████░░░░░░ │
│ Up 01:23:45 1.23T RF │ ← uptime | cumulative RF
│ Action Reactivated (cooled) │
│ │
│ Battery ON 75.3% │ ← battery mode toggle (tap ON/OF)
│ Stop@95% Start@25% │
│ ██████████████████░░░░░░░░░░ │ ← battery progress bar
└───────────────────────────────┘
Touchscreen interactions:
- Output gate row (8): Tap
</<</<<<to decrease by 1k / 10k / 100k;>/>>/>>>to increase - Input gate row (10): Same buttons, visible only in MANUAL mode
AU/MAbadge (row 10, cols 14–15): Tap to toggle AUTO ↔ MANUAL input gate controlON/OFbadge (row 22, cols 10–11): Tap to toggle battery-linked control (requires pylon configured)
When enabled, drmon monitors the energy core fill level and manages the reactor automatically:
- Reactor runs normally until storage reaches batteryHighPct (default 95%)
- Reactor is stopped; flux gates are closed
- Base draws from storage until it drains to batteryLowPct (default 25%)
- Reactor charges up and resumes
This can dramatically extend fuel life on bases that don't continuously consume reactor-level power. The reactor only runs as much as necessary to keep up with actual demand.
Requirements: The energy pylon must be on the same wired modem network as the reactor computer, and its peripheral name must be set in config.txt (or entered during install.lua).
Safety: Battery-linked control is skipped entirely if an emergency shutdown (temperature or field) is active. Manual remote commands (startup / shutdown via pocket remote) also clear the battery-pause state so you retain full manual override.
The reactor computer listens for rednet messages on any wireless/ender modem it finds:
| Message | Action |
|---|---|
status |
Replies with the full getReactorInfo() table |
startup |
Charges and activates the reactor |
shutdown |
Stops the reactor |
reboot |
Reboots the computer |
checkin |
Replies hello v5.1 |
identify |
Toggles monitor background light blue (useful when managing multiple reactors) |
- On the reactor computer, hold Ctrl+T to terminate the running program, then:
reboot - On reboot,
startuprunsinstall.luawhich detects the version mismatch, re-runs the setup wizard, and migratesconfig.txtautomatically.
| File | Runs on | Purpose |
|---|---|---|
install.lua |
Reactor computer | First-time setup wizard; downloads all files |
drmon.lua |
Reactor computer | Reactor monitoring, control, and automation |
bat.lua |
Storage computer | Energy core / pylon monitor |
pocket.lua |
Ender pocket computer | Wireless remote status and control |
pocket-install.lua |
Ender pocket computer | Downloads pocket.lua |
lib/f.lua |
(shared library) | Formatting and monitor-drawing utilities |
"Reactor not found on side: back"
The reactor stabiliser is not directly adjacent to the computer, or is on a different side. Re-run install.lua to reconfigure, or edit line 3 of config.txt.
"getReactorInfo() returned nil" The reactor build is incomplete (missing stabilisers, containment blocks, or fuel). Fix the build, then reboot.
Flux gates not responding
Check that the wired modems on both flux gates are turned on (right-click to toggle). The peripheral names in config.txt must match exactly what appears on the modem network. Re-run install.lua to re-detect.
Monitor shows nothing Confirm all 9 monitor blocks are arranged in a 3×3 touching grid, the wired modem on the monitor array is turned on, and the cable is connected to the same network as the computer.
Battery-linked control does nothing
- Confirm
batteryPylonNameinconfig.txtis not blank - Confirm the energy pylon's wired modem is turned on
- Tap the
ONbadge on the monitor to enable the mode (it defaults to OFF) - Check
drmon.logfor error messages
Pocket remote shows "NO SIGNAL"
- The reactor computer needs an ender modem (the wired network modem is not enough for wireless)
- Make sure neither computer is in an unloaded chunk