IEMS
by NSCS00
IEMS, a NeoForge mod for 1.21.1, adds a wire-pulling system that links energy devices across blocks, with energy stored in the SE Standard Energy unit.
What it does
Players connect devices by aiming at one with Shift and right-clicking, then aiming at a second device and repeating the action. While a wire is being pulled, a HUD shows the live distance against the maximum allowed. Past the maximum, plus a buffer of 10 blocks, the wire retracts with a notification. Crossing into another dimension, through a portal for instance, retracts the wire at once, and leaving the world clears any pending wire-pulling state.
The server checks every requested connection before it is made: both endpoints must be legal devices in the same dimension, within distance, and not duplicates of an existing link. Energy values are kept precisely with BigInteger, and energy from external FE devices is converted automatically through a bridge layer. IEMS is client and server: the server validates connections and the client renders them, so both sides need the mod. It is released under the MIT License and is open source; the 0.8.0-beta release, published 2026-10-11 on the beta channel, is a complete rewrite of the earlier IEMS with a separated logic and presentation layer.
Key features
Wire pulling
Shift and right-click on a device starts a wire, and a second right-click on a target device completes the link.
Distance limit with buffer
A live distance readout shows the wire length, and it retracts automatically once it passes the maximum plus 10 blocks.
Cross-dimension safety
A wire retracts as soon as its endpoints would sit in different dimensions, so old coordinates are never reused.
Energy unit conversion
Energy is stored in the SE Standard Energy unit, and FE devices are converted to it automatically through a bridge layer.
Beam rendering
The beam keeps a minimum on-screen width at a distance so it stays visible, and it is drawn double-sided so it shows from any viewing angle.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Aeronautics: DriveByPower is also a NeoForge mod for 1.21.1 that runs on client and server, and it is open source under the MIT License. CC: RJ45 is a NeoForge mod for 1.21.1 that runs on client and server, and it is released under the CC0 1.0 Universal license.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| IEMS | NeoForge | 1.21.1 | Client and server | 2026-10-11 |
| Aeronautics: DriveByPower | NeoForge | 1.21.1 | Client and server | 2026-05-07 |
| CC: RJ45 | NeoForge | 1.21.1 | Client and server | 2026-10-15 |
Questions
Does IEMS need to be installed on the server?
What happens when a wire crosses into another dimension?
Which loader and version does IEMS support?
In the catalog
IEMS is one of 8,499 Technology mods on ModsFinder, and one of 3,557 Technology mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
Similar mods
What the author says
All energy uses SE (Standard Energy) as its unified unit and is stored precisely as a BigInteger. The energy of external FE devices is converted automatically by the bridge layer. How to enter: - Aim at a device that implements the wire-pulling contract and press Shift + right-click
Official listing
- Modrinth page
- modrinth.com/mod/iems
- Owner
- NSCS00
- Published
- 2026-03-04
- Updated on Modrinth
- 2026-10-11
- Facts verified
- 2026-10-15