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The ERS-CU01 Current Sensor is a compact telemetry module for use with compatible ExpressLRS receivers. Installed inline between the battery and ESC, it measures real-time operating current and voltage sending the data through the ExpressLRSreceiver for display on your EdgeTX radio. This provides instant insight into system load, efficiency, and power consumption across your entire powertrain.
As part of the ERS sensor family, the ERS-CU01 also supports pass-through expansion, allowing easy daisy-chaining with additional telemetry modules.
Video
Features
- Real-Time Per-Cell Voltage Monitoring: Instantly view individual cell voltages through your radio for improved battery safety and performance.
- Plug-and-Play Balance Port Connection: Easily connects to the battery’s balance port for accurate cell-level voltage readings.
- Future-Ready Pass-Through: Includes an in-and-out port to daisy-chain additional ERS telemetry sensors as your setup grows.
- Seamless ExpressLRS Integration: Designed to work effortlessly with compatible ER series ExpressLRS PWM receiver.
Plug and Play Compatible Receivers:
- ER6 2.4GHz ExpressLRSPWM Receiver
- ER8 2.4GHz ExpressLRSPWM Receiver
- ER8G & ER8GV ExpressLRS PWM Receiver
Using Sensors with Non-Plug-and-Play PWM ExpressLRS Receivers:
Most PWM ExpressLRS receivers are fully compatible; those without a dedicated UART port require reconfiguration to support external sensors (e.g., for telemetry). To enable this, reassign two PWM output pins as a serial UART—one for TX and one for RX—via the receiver’s Web UI (accessed by putting the receiver into WiFi mode) or via the ExpressLRS LUA script. This enables sensor connectivity while preserving the remaining PWM channels for servos or ESCs.
For receivers that only provide standard servo pins, an optional adapter cable is available that converts the sensor’s UART connector to two standard servo plugs (TX and RX). Available here: https://radiomasterrc.com/products/ers-sensor-uart-to-dual-pwm-adapter
Sensor Configuration & Telemetry Logging
To configure this sensor and view telemetry on your EdgeTX radio, install the RadioMaster Sensor Configurator LUA. The LUA allows adjustment of sensor settings, enables proper telemetry display, and supports data logging for post-flight review.
After downloading, connect your radio to a Mac or PC in USB-SD mode.
Copy the LUA files to:
/SCRIPTS/TOOLS/
👉Download the RadioMaster ERS Sensors Configurator.lua
*Battery Capacity must be set in mAh for telemetry
Tekniset tiedot
- Item: ERS-CU01 Current Sensor
- Operating voltage: 5–8.4V
- Operating current: 22mA
- Current range: 1–150A
- Max voltage: 70V
- Current accuracy: ±0.5A
- Voltage accuracy: ±0.1V
- Continuous current: 100A
- Temperature range: –10 ℃ to +85 ℃
- Size: 30 × 25 × 10.5mm
- Weight: 20.6g
Download
Size
Weight
Package Includes
- 1 * ERS-CU01 Current Sensor
- 3 * Heat-Shrinkable Tube
- 1 * Manual QR Code Card
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