{"product_id":"ers-cu01-real-time-current-sensor-for-compatible-expresslrs-pwm-receivers","title":"ERS-CU01 - Real-Time Current Sensor for compatible ExpressLRS PWM Receivers","description":"\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003eAs part of the ERS sensor family, the ERS-CU01 also supports pass-through expansion, allowing easy daisy-chaining with additional telemetry modules. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePackage Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e1x ERS-CU01 Current Sensor\u003c\/p\u003e\n\u003cp\u003e3x Heat-Shrinkable Tube\u003c\/p\u003e\n\u003cp\u003e1x Manual QR Code Card\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"ERS-CU01 - Real-Time Current Sensor for compatible ExpressLRS PWM Receivers\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/1_bd92a794-19aa-4b13-9467-e83ae356542c.jpg?v=1769578521\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eLaunch Video\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"video-wrapper\"\u003e\u003ciframe width=\"1349\" height=\"759\" src=\"https:\/\/www.youtube.com\/embed\/ICXLDRpYn9I\" title=\"\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-type=\"text\"\u003eFeatures:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal-Time Current Monitoring:\u003cspan\u003e \u003c\/span\u003e\u003c\/strong\u003eView live current draw and voltage directly on your radio to better understand system performance and prevent overload conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInline Installation:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eSoldered between the battery and ESC for accurate, full-system current measurement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFuture-Ready Pass-Through:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eIncludes in-and-out ports for daisy-chaining additional ERS sensors as your telemetry needs grow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeamless ExpressLRS Integration:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eDesigned to work smoothly with compatible ExpressLRS PWM receivers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-type=\"text\"\u003ePlug and Play Compatible Receivers:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan data-type=\"text\"\u003eER6 2.4GHz ExpressLRSPWM Receiver\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-type=\"text\"\u003eER8 2.4GHz ExpressLRSPWM Receiver\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan data-type=\"text\"\u003eER8G \u0026amp; ER8GV ExpressLRS PWM Receiver\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-type=\"text\"\u003eUsing Sensors with Non-Plug-and-Play PWM ExpressLRS Receivers:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-type=\"text\"\u003eMost 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.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-type=\"text\"\u003eFor 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). \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-type=\"text\"\u003eSensor Configuration \u0026amp; Telemetry Logging\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-type=\"text\"\u003eTo 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.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-type=\"text\"\u003eAfter downloading, connect your radio to a Mac or PC in USB-SD mode.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-type=\"text\"\u003eCopy the LUA files to:\u003cbr\u003e\/SCRIPTS\/TOOLS\/\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-type=\"text\"\u003e👉\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/SENSOR_LUA.zip?v=1769595857\" rel=\"noopener\" target=\"_blank\"\u003eDownload the RadioMaster ERS Sensors Configurator.lua\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"ERS-RC01 - CDI Gas Engine Tachometer for Compatible ExpressLRS PWM Receivers\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/RM_Sensor_Configurator_LUA_Main.jpg?v=1769742102\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"ERS-RC01 - CDI Gas Engine Tachometer for Compatible ExpressLRS PWM Receivers\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/RM_Sensor_Configurator_LUA_Sensor_view.jpg?v=1769742102\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/RM_Sensor_Configurator_LUA_CU01.jpg?v=1769742103\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"4ever-article\" data-clipboard-cangjie='[\"root\",{},[\"p\",{\"uuid\":\"miod46jg3ja9apoz2b\"},[\"span\",{\"data-type\":\"text\"},[\"span\",{\"bold\":true,\"color\":\"\",\"data-type\":\"leaf\"},\"Features\"]]]]' data-identifier-application__slash__x-cangjie-fragment=\"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\" data-identifier-application__slash__x-doc-key=\"5VLqXLbR7jmjYqX1\"\u003e\u003cspan\u003e\u003cstrong\u003e*Battery Capacity must be set in mAh for telemetry\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003carticle class=\"4ever-article\" data-clipboard-cangjie='[\"root\",{},[\"p\",{\"uuid\":\"miod46jg3ja9apoz2b\"},[\"span\",{\"data-type\":\"text\"},[\"span\",{\"bold\":true,\"color\":\"\",\"data-type\":\"leaf\"},\"Features\"]]]]' data-identifier-application__slash__x-cangjie-fragment=\"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\" data-identifier-application__slash__x-doc-key=\"5VLqXLbR7jmjYqX1\"\u003e\n\u003cp\u003e\u003cimg alt=\"ERS-CU01 - Real-Time Current Sensor for compatible ExpressLRS PWM Receivers\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/2_0a50c886-d541-4a85-a191-c99faadebfa8.jpg?v=1769578521\"\u003e\u003cimg alt=\"ERS-CU01 - Real-Time Current Sensor for compatible ExpressLRS PWM Receivers\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/3_b0c49753-2a97-4684-af03-2e74e7a087eb.jpg?v=1769578521\"\u003e\u003cimg alt=\"ERS-CU01 - Real-Time Current Sensor for compatible ExpressLRS PWM Receivers\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/4_77ba1cc8-d69a-40ec-ab1b-2a03e7454de7.jpg?v=1769578521\"\u003e\u003cimg alt=\"ERS-CU01 - Real-Time Current Sensor for compatible ExpressLRS PWM Receivers\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/8_1dcf0480-4926-4104-9029-2636895967d1.jpg?v=1769578521\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-type=\"text\"\u003eSpecifications\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eItem: ERS-CU01 Current Sensor\u003c\/li\u003e\n\u003cli\u003eOperating voltage: 5–8.4V\u003c\/li\u003e\n\u003cli\u003eOperating current: 22mA\u003c\/li\u003e\n\u003cli\u003eCurrent range: 1–150A\u003c\/li\u003e\n\u003cli\u003eMax voltage: 70V\u003c\/li\u003e\n\u003cli\u003eCurrent accuracy: ±0.5A\u003c\/li\u003e\n\u003cli\u003eVoltage accuracy: ±0.1V\u003c\/li\u003e\n\u003cli\u003eContinuous current: 100A\u003c\/li\u003e\n\u003cli\u003eTemperature range: –10 ℃ to +85 ℃\u003c\/li\u003e\n\u003cli\u003eSize: 30 × 25 × 10.5mm\u003c\/li\u003e\n\u003cli\u003eWeight: 20.6g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDownload\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/ERS-CU01-1.4.pdf?v=1769658273\" rel=\"noopener\" target=\"_blank\"\u003eERS-CU01 User Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/SENSOR_LUA.zip?v=1769595857\"\u003eRadioMaster ERS Sensors Configurator.lua\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan data-type=\"text\"\u003eSize\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/5_771cb3a2-3d28-44de-81ba-0ffd2c352816_480x480.png?v=1769579420\" alt=\"ERS-CU01 - Real-Time Current Sensor for compatible ExpressLRS PWM Receivers\"\u003e\u003c\/p\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/6_908be9f0-b240-4001-b6fe-91a7784aa68b.jpg?v=1769579390\" alt=\"ERS-CU01 - Real-Time Current Sensor for compatible ExpressLRS PWM Receivers\"\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/article\u003e","brand":"RadioMaster","offers":[{"title":"Default Title","offer_id":42113339654224,"sku":"RM-1901","price":29.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1343\/5043\/files\/1_1800x1800_f6e5a987-f565-47bb-81c3-c2c96e5c1585.webp?v=1772662879","url":"https:\/\/dronedynamics.ca\/zh\/products\/ers-cu01-real-time-current-sensor-for-compatible-expresslrs-pwm-receivers","provider":"DroneDynamics.ca","version":"1.0","type":"link"}