RadioMaster ERS-BA01 – Precision Barometric Altitude Sensor for ExpressLRS Systems
£16.99 Inc. VAT
Real-time barometric altitude telemetry for ExpressLRS systems — the lightweight ERS-BA01 delivers accurate altitude data straight to your EdgeTX radio.
In stock|Next shipping: 10/03/2026
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.
Features
- Real-Time Altitude Telemetry: Converts barometric pressure measurements into accurate relative altitude data for instant feedback on your radio.
- Expansion-Ready Pass-Through: Includes an in-and-out port for daisy-chaining additional ERS sensors without rewiring your setup.
- Seamless ExpressLRS Compatibility: Integrates easily with supported ExpressLRS PWM receivers via CRSF for fast and dependable data transmission.
Plug and Play Compatible Receivers:
- ER6 2.4GHz ExpressLRSPWM Receiver
- ER8 2.4GHz ExpressLRSPWM Receiver
- ER8G & ER8GV ExpresersLRS 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.
Sensor Configuration & Telemetry Logging
o 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
- Item: ERS-BA01 Barometer Sensor
- Operating voltage: 5–8.4V
- Operating current: 9mA
- Altitude accuracy: ±0.5m
- Temperature range: –10 ℃ to +85 ℃
- Size: 23.5 × 13 × 7mm
- Weight: 3.5g
Included:
- 1 * ERS-BA01 Precision Barometric Altitude Sensor
- 3 * Heat-Shrinkable Tube
- 1 * Manual QR Code Card
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SHIPPING & DELIVERY
We are based in the UK and ship to most destinations worldwide.
We dispatch orders during the times shown on our Dispatch Schedule. Orders placed before the daily dispatch cutoff will ship the same day (subject to stock availability). Orders placed after the cutoff will ship on the next scheduled dispatch day.
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Next Dispatch: Tomorrow
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Shipping to the UK
- Order before the daily dispatch cutoff for same day dispatch.
- FREE delivery available on qualifying orders over £99 (under 1kg).
For small, low-value orders, Royal Mail First Class is our most economical option. Royal Mail Tracked 24 is the most popular choice, offering full tracking and flexible delivery options. For guaranteed next working day delivery, we recommend Royal Mail Special Delivery.
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Smaller, lower-value orders may be sent via Airmail or tracked postal services. Economy road and express air courier options are available depending on destination. For faster delivery, we recommend express air courier services such as DHL Express, which typically deliver within 1–2 working days across Europe and a few working days for most other destinations.
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