Radiomaster MT12 ELRS Radio Controller The Radiomaster MT12 ELRS radio controller is a modern, high-performance solution for combat robotics and other ground-based RC applications, combining a wheel-and-trigger surface-style layout with the speed, reliability, and flexibility of ExpressLRS and EdgeTX. This is the same radio John ran and trusted in competition, and his experience was a major factor in our decision to carry it at ItGresa Robotics. What it is / Who it’s for The MT12 ELRS is designed for builders who want precise, low-latency control of drive and weapon systems without being locked into proprietary firmware or protocols. Its surface-style wheel-and-trigger format is ideal for combat robots, RC cars, and other ground vehicles where smooth steering, reliable throttle control, and configurable switches matter more than dual-stick aircraft inputs. Includes an ER3C-i ELRS Receiver. How it works At its core, the MT12 ELRS uses an internal 2.4GHz ExpressLRS radio module paired with the open-source EdgeTX operating system. ExpressLRS provides fast response times, robust link quality, and modern telemetry support, while EdgeTX allows deep customization of mixes, switches, rates, and logic to match your robot’s control needs. Hall-effect sensors on both the steering wheel and trigger ensure consistent, wear-free input over time. What you’ll need The MT12 ELRS is powered by user-supplied batteries. Batteries are not included. The radio supports 2 × 18650 cells, which are widely available and easy to source, or an equivalent 2S 7.4V battery pack. Charging is handled through the built-in USB-C port, supporting convenient bench and pit charging. Why this controller Unlike entry-level radios, the Radiomaster MT12 ELRS is built around open standards. You’re not locked into a single ecosystem, and the radio can grow with your builds as your control requirements become more advanced. The compact, ergonomic design makes it comfortable for long sessions at the test box or in the pits, while the standardized button layout and modular switch options make it easy to adapt to different robot configurations. Safety & best practices As with any combat robotics control system, always verify failsafe behavior before powering weapons, confirm correct channel mapping, and test range and response in a safe environment. Ensure batteries are in good condition and properly seated before operation, and follow all applicable event safety rules when competing. Receiver inclusion varies by package and will be clearly stated once confirmed. If a receiver is included, it will be explicitly listed here.
