{"product_id":"radiomaster-ers-ba01-sensor","title":"RadioMaster ERS-BA01 Barometer Sensor for ExpressLRS Receivers - CRSF Altitude Telemetry for EdgeTX","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eThe RadioMaster ERS-BA01 is a barometer sensor that provides accurate, real-time relative altitude telemetry for compatible ExpressLRS PWM receivers. It measures barometric pressure and sends altitude data back to your EdgeTX radio for clear, responsive altitude monitoring.\u003c\/p\u003e\u003cp\u003eAs part of the ERS sensor family, the ERS-BA01 supports daisy-chain expansion via pass-through wiring, making it easy to add additional ERS telemetry modules in a linear chain.\u003c\/p\u003e\u003ch2\u003eLaunch Video\u003c\/h2\u003e\u003cp\u003e\u003ciframe height=\"759\" src=\"https:\/\/www.youtube.com\/embed\/ICXLDRpYn9I\" title=\"\" width=\"1349\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal-time altitude telemetry:\u003c\/strong\u003e Converts barometric pressure into relative altitude data for display on your radio.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDaisy chain expansion:\u003c\/strong\u003e Pass-through design for scalable telemetry with additional ERS sensors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpressLRS compatible:\u003c\/strong\u003e Designed to integrate with supported ExpressLRS PWM receivers via CRSF telemetry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRM Sensor Configurator support:\u003c\/strong\u003e Works with the RadioMaster Sensor Configurator LUA for sensor setup, telemetry display, and logging.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatible Receivers\u003c\/h2\u003e\u003ch3\u003ePlug-and-play compatible receivers\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eER6 2.4GHz ExpressLRS PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER8 2.4GHz ExpressLRS PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER8G ExpressLRS PWM Receiver\u003c\/li\u003e\n\u003cli\u003eER8GV ExpressLRS PWM Receiver\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatibility note (non plug-and-play PWM ExpressLRS receivers)\u003c\/h3\u003e\u003cp\u003eMost PWM ExpressLRS receivers are compatible. Receivers without a dedicated UART port require reconfiguration to support external sensors: reassign two PWM output pins as a serial UART (TX and RX) using the receiver Web UI (WiFi mode) or the ExpressLRS LUA script. For receivers that only provide standard servo pins, an optional adapter cable (UART to dual PWM) may be required.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eItem\u003c\/td\u003e\n\u003ctd\u003eERS-BA01 Barometer Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating voltage\u003c\/td\u003e\n\u003ctd\u003e5-8.4 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating current\u003c\/td\u003e\n\u003ctd\u003e9 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAltitude accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.5 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e-10 °C to +85 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e23.5 x 13 x 7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e3.5 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch2\u003eDownloads\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/ERS-BA01-1.3.pdf?v=1769666709\" rel=\"noopener\" target=\"_blank\"\u003eERS-BA01 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\" rel=\"noopener\" target=\"_blank\"\u003eRadioMaster ERS Sensors Configurator.lua\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0701\/8066\/7584\/files\/ERS_Sensors_V1.9.bin?v=1778047269\" rel=\"noopener\" target=\"_blank\"\u003eERS Series Sensors Firmware V1.9\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eFor product support, setup questions, or after-sales assistance, contact support@rcdrone.top or visit https:\/\/rcdrone.top\/.\u003c\/p\u003e\u003ch2\u003eWhat's Included\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e1 x ERS-BA01 Precision Barometric Altitude Sensor\u003c\/li\u003e\n\u003cli\u003e3 x Heat-shrinkable tube\u003c\/li\u003e\n\u003cli\u003e1 x Manual QR code card\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2 id=\"details\"\u003eDetails\u003c\/h2\u003e\u003cdiv class=\"details-gallery\"\u003e\n\u003cimg alt=\"RadioMaster ERS-BA01 barometer sensor module for ExpressLRS PWM receivers, front label with TX\/RX pads\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-BA01---Precision-Barometric-Altitude-Sensor.jpg?v=1780651736\"\u003e\u003cp\u003eAdd accurate relative-altitude telemetry to compatible ExpressLRS PWM receivers with the ERS-BA01 barometer sensor.\u003c\/p\u003e\n\u003cimg alt=\"EdgeTX Apps menu highlighting the RM Sensor Configurator option for setting up RadioMaster ERS sensors\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-BA01---Precision-Barometric-Altitude-Sensor_329cb578-b44f-4ad3-b6b6-964fa568ae5e.jpg?v=1780651743\"\u003e\u003cp\u003eSetup and manage ERS sensors using the RadioMaster Sensor Configurator LUA on EdgeTX.\u003c\/p\u003e\n\u003cimg alt=\"RadioMaster Sensor screen listing detected telemetry modules including BARO (barometer) sensor entry\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-BA01---Precision-Barometric-Altitude-Sensor_4c43be90-ba83-4b26-b940-3f80e41e842a.jpg?v=1780651751\"\u003e\u003cimg alt=\"RadioMaster Sensor Configurator page for BARO sensor with options for LED, calibrate, reset config, and firmware update\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-BA01---Precision-Barometric-Altitude-Sensor_15beb75c-a718-4bb3-82ca-a3552c8645d8.jpg?v=1780651758\"\u003e\u003cimg alt=\"ERS sensor family connected in a linear daisy-chain via pass-through wiring for scalable CRSF telemetry\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-BA01-Barometer-Sensor.webp?v=1780652048\"\u003e\u003cp\u003ePass-through wiring supports linear daisy-chaining, making it easy to expand your telemetry setup with additional ERS modules.\u003c\/p\u003e\n\u003cimg alt=\"Altitude telemetry example on EdgeTX radio display with ERS-BA01 barometer sensor connected for real-time altitude data\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-BA01---Precision-Barometric-Altitude-Sensor_6409ddfa-7222-4c58-a630-44429a3a10b8.jpg?v=1780651775\"\u003e\u003cp\u003eReal-time barometric pressure readings are converted into responsive altitude telemetry on your EdgeTX radio.\u003c\/p\u003e\n\u003cimg alt=\"Plug-and-play compatibility chart for ERS-BA01 with ExpressLRS PWM receivers, including ER6, ER8, ER8G, and ER8GV\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-BA01---Precision-Barometric-Altitude-Sensor_c31119be-0550-4319-840f-e400cca4b597.jpg?v=1780651783\"\u003e\u003cp\u003ePlug-and-play with ER6, ER8, ER8G, and ER8GV receivers; other PWM ExpressLRS receivers may require UART pin reassignment.\u003c\/p\u003e\n\u003cimg alt=\"ERS-BA01 barometer sensor specifications table showing 5–8.4 V input, 9 mA current, ±0.5 m accuracy, 3.5 g weight\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-BA01---Precision-Barometric-Altitude-Sensor_85800afa-dd86-4a70-9d3c-4b4ddae6c5fa.jpg?v=1780651790\"\u003e\u003cimg alt=\"Close-up of ERS-BA01 barometer sensor showing compact PCB size dimensions (23.5 × 13 × 7 mm) and wiring lead\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-BA01---Precision-Barometric-Altitude-Sensor_352ac285-68a9-43cf-8eaf-ba4e0c4f4ea5.jpg?v=1780651797\"\u003e\u003cp\u003eCompact 23.5 × 13 × 7 mm module fits easily into tight RC builds while adding altitude telemetry.\u003c\/p\u003e\n\u003cimg alt=\"ERS-BA01 barometer sensor placed on a digital scale for weight reference\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-BA01---Precision-Barometric-Altitude-Sensor_c977646b-9c17-46e6-89ec-75fa8ab4d8db.jpg?v=1780651806\"\u003e\u003cimg alt=\"Package contents for ERS-BA01: barometer sensor module, manual QR code card, and three heat-shrink tubes\" loading=\"lazy\" src=\"https:\/\/rcdrone.top\/cdn\/shop\/files\/RadioMaster-ERS-BA01---Precision-Barometric-Altitude-Sensor_567d0603-3eba-48e6-82a7-2b746f0e0d04.jpg?v=1780651814\"\u003e\u003cp\u003ePackage includes the ERS-BA01 sensor, a manual QR code card, and three heat-shrink tubes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"RadioMaster","offers":[{"title":"Default Title","offer_id":52968628355296,"sku":"RM0157.ERS-BA01-1","price":28.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0643\/3210\/3904\/files\/1_e8aa1458-78a8-4392-a4e6-37ef4f03b00f.jpg?v=1780585782","url":"https:\/\/rcdrone.top\/zh\/products\/radiomaster-ers-ba01-sensor","provider":"RCDrone","version":"1.0","type":"link"}