SKU: 38938089404

Radiomaster ERS-CV01 - Precision Cell Voltage Sensor for Compatible ELRS PWM Receivers

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Description

Radiomaster ERS-CV01 - Precision Cell Voltage Sensor for Compatible ELRS PWM ReceiversThe ERS CV01 Cell Voltage Sensor is a compact, plug and play telemetry module for use with compatible ExpressLRS receivers. Just connect the sensor to your batterys balance port, and it will monitor the real time voltage of each cell, transmit the data via the ExpressLRS receiver, and display it directly on your EdgeTX radio. As part of the ERS sensor family, the ERS CV01 also supports pass through expansion, allowing easy daisy chaining with

The ERS-CV01 Cell Voltage Sensor is a compact, plug-and-play telemetry module for use with compatible ExpressLRS receivers. Just connect the sensor to your battery’s balance port, and it will monitor the real-time voltage of each cell, transmit the data via the ExpressLRS receiver, and display it directly on your EdgeTX radio. 

As part of the ERS sensor family, the ERS-CV01 also supports pass-through expansion, allowing easy daisy-chaining with additional telemetry modules.

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). 

Cell Voltage Display, Configuration & Logging

The ERS-CV01 Cell Voltage Sensor requires both the CellsValues LUA and the RadioMaster Sensor Configurator LUA to function correctly. Together, these LUAs enable per-cell voltage display, sensor configuration, and telemetry logging for post-flight review on EdgeTX radios.

After downloading, connect your radio to a Mac or PC in USB-SD mode and copy the files as follows:

  • CellsValues LUA → /WIDGETS/
  • RadioMaster Sensor Configurator LUA → /SCRIPTS/TOOLS/

👉Download the CellsValues LUA

👉Download the RadioMaster ERS Sensors Configurator.lua

*adding telemetry to EdgeTx screen.

Specifications

  • Item: ERS-CV01 Cell Voltage Sensor
  • Operating voltage (serial port): 5–8.4V
  • Operating current (serial): 8mA
  • Balance port current (8S): 2mA
  • Supported cells: 2–8S
  • Battery types: LiPo, LiHV, LiFe, LiIon
  • Voltage accuracy: ±0.01V
  • Temperature range: –10 ℃ to +85 ℃
  • Size: 43.5 × 25 × 7mm
  • Weight: 6.5g

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Size

Weight

Package Includes

  • 1 * ERS-CV01 Cell Voltage Sensor
  • 3 * Heat-Shrinkable Tube
  • 1 * Manual QR Code Card

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 38938089404

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WHERE HAVE YOU BEEN 😊
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I purchased RANTILA 3 Panel Room Divider, 6 Ft Tall Folding Privacy Screen Freestanding Room Partition Wall Dividers, 102''W x 20''D x 71''H, Grey. For outdoor use on my patio is perfect . PRIVACY!!! YAY! It was packaged very carefully. There were no missing parts. Instructions were there but I still had to use the video visually. A few screws would not screw in. So I used a hammer with a few good taps that helped using the screw driver. 😊 It was easy putting it together following the directions. Everything is well made. Love the height, functionality and it’s definitely light it works. Thank you
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Ellen W.
Houston, US
★★★★★ 5
I am happy with the room divider. It does what I intended.
Color: Beige, Size: 34" - 3 Panel
Use a power screwdriver.
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Reviewed in the United States on April 25, 2026
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Michele Parkinson
Louisville, US
★★★★★ 3
It’s really pretty decent except for one thing.
Color: Grey, Size: 34" - 4 Panel, Color: Grey, Size: 34" - 4 Panel
I bought two of these for my basement and they do look great. They were easy to assemble and I’m happy with them. The problem is that the stitching on the fabric panels are almost the size of a machine basting stitch (which for non sewers means large temporary stitches). Because the panels are tight by design, the stitches had already started to come undone before I could finish assembling everything. Fortunately I can sew and I reinforced all the panels. I had to take the first ones back off the poles to do them but I did the second set before assembling. It’s really not a bad product for the money. It’s quality fabric and the design itself looks great. The stitching looks fine but it’s just not substantial enough for the purpose it is supposed to serve. I can’t imagine why it be sewn so insufficiently. I was able to resolve my issue because I can sew. I wasn’t planning on sewing nor did I really have the time. I could have made it myself but I didn’t want to and that is why I purchased this. I ended up using valuable time. The really unfortunate thing is, I have no other complaints. This is a manufacturing problem.
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Mad Jack
San Leandro, US
★★★★★ 5
Inexpensive walls.
Color: Grey, Size: 34" - 3 Panel, Color: Grey, Size: 34" - 3 Panel
We had a hot request for a workstation in the warehouse with some privacy. These have worked great. Easy to assemble. They are lightweight and stable. This was an inexpensive solution that looks professional. Our client loved it.
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Reviewed in the United States on August 1, 2025
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Amber
San Leandro, US
★★★★★ 1
Dont wait! Assemble right away! Just in case you need to return it.
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Ok, I like the idea of this but the assembly is frustrating. One side lined up perfectly with the holes however, the small bars that connect the screen to base is not lining up. I think it's do the fabric the screen or divider is made of. It's not stretchy. I brought this months ago and just opened it today. I'm upset and don't even think returning it is possible. If the material was a bit longer or stretchy to give a little room to work with this divider would be great. However, I'm not sure what I can use it for since I'm unable to attach it to the bottom. Beware! Don't wait like me. Tip for the manufacturer. Next time invest in Velcro dividers so the fabric can be adjusted with ease. Literally if I take the screen off the frame aligns perfectly. However, it defeats its purpose of privacy. I might buy some material myself and create a more flexible divider. Or I'll buy Velcro myself and attach to the bottom. I don't know yet.
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