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Thursday, February 8, 2024

Assessment: BetaFPV Nano TX V2 ExpressLRS Module – Greatest Performing Price range ELRS Module?

Over two years in the past, BetaFPV launched their Nano TX ExpressLRS module to the world, they usually’ve simply launched the second era, boasting vital enhancements over the unique. Does the BetaFPV Nano TX V2 ELRS module stand as much as the hype, and the way it compares to different nano-sized ExpressLRS modules? Let’s discover out on this overview.

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Be taught extra about ExpressLRS right here: https://oscarliang.com/setup-expresslrs-2-4ghz/

The place to Purchase?

You should purchase the BetaFPV Nano TX V2 module from:

The BetaFPV Nano TX V2 is available in three frequency choices: 2.4GHz, 868MHz, and 915MHz. My overview focuses on the two.4GHz model, as it’s my frequency of alternative for the management hyperlink.

Betafpv Nano Tx V2 Expresslrs Elrs Module Unbox Accessories Parts

Specs and Options

  • Antenna Connector: RP-SMA (2.4GHz), SMA (915/868MHz)
  • RF Energy (2.4GHz): As much as 1W
  • RF Energy (915/868MHz): As much as 2W
  • Packet Price (2.4GHz): As much as 1000Hz
  • Packet Price (915/868MHz): As much as 200Hz
  • Frequency Band: 2.4GHz ISM, 915MHz FCC, 868MHz EU
  • Enter Voltage: 7V~13V DC
  • Energy Consumption: Varies by frequency and energy
  • USB Port: Sort-C
  • Fan Voltage: 5V
  • Default Firmware: ExpressLRS V3.3.0
  • Weight: 28g

The Nano TX V2 options an built-in TCXO (Temperature-compensated crystal oscillator) to reduce frequency deviation as a result of temperature variations for secure efficiency, and likewise deal with higher with sign interference with different units such because the VTX.

The V2 module helps ExpressLRS Backpack, which suggests you might configure it to do cool stuff like altering your analog goggle’s channel utilizing your radio.

Right here’s a comparative overview between the brand new Nano TX V2 and the earlier model.

Nano TX V2 Nano TX V1
Max RF Energy 1W (2.4GHz)
2W (915/868MHz)
RF Chip SX128X/SX1276 SX128X/SX1276
Antenna T-LED Supported Unsupported
Cooling Fan Sure No
ELRS Backpack Supported Unsupported
Exterior Energy Provide Supported (7-13V) Unsupported

Nearer Look

The Nano TX V2 maintains an analogous aesthetic to its predecessor, that includes a white, injection-molded plastic shell and a light-weight construct at simply 28 grams.

Betafpv Nano Tx V2 Expresslrs Elrs Module Connector Pins Underside

A USB Sort-C port beneath the module facilitates firmware updates and exterior energy connectivity.

For top RF energy calls for that sure older radios can’t meet, an exterior energy supply (7-13V) may be linked utilizing the supplied USB-C to XT30 cable. My assessments with the Radiomaster Boxer and Pocket confirmed that exterior energy isn’t wanted for working at 1W, although it’s additionally a helpful choice for these experiencing battery voltage sag at excessive outputs.

Betafpv Nano Tx V2 Expresslrs Elrs Module Antenna Connector Rpsma

The two.4GHz module makes use of an RP-SMA antenna connector, whereas the 868/915MHz variations are geared up with SMA connectors.

Betafpv Nano Tx V2 Expresslrs Elrs Module Pinout Buttons Diagram

Two customizable buttons on the module permit for straightforward entry to capabilities like Bind Mode, RF Energy adjustment, and VTX Settings modifications and so on.

Betafpv Nano Tx V2 Expresslrs Elrs Module Dissemble Pcb

Betafpv Nano Tx V2 Expresslrs Elrs Module Dissemble Pcb Cooling Fan

With the elevated transmission energy, the Nano TX V2 features a built-in cooling fan, robotically activated at 250mW or larger by default. Though efficient in conserving the module cool, the fan is noticeably loud, measured round 48dB from a meter away.

T-LED Antenna

Betafpv Nano Tx V2 Expresslrs Elrs Module T Led Antenna

The Nano TX V2 introduces a first-ever function: the “T-LED” antenna—a T antenna with an built-in LED mild. It’s supposed for pilots to visually monitor their sign throughout flight, with the LED flickering to point information transmission and reception. The flickering pace varies primarily based on the telemetry ratio and packet fee. The T-LED antenna provides a 2dBi acquire, and you might put normal (non-LED) antennas on the Nano TX V2 too.

Nevertheless, in my expertise, the practicality of the T-LED antenna is considerably restricted. Below daylight circumstances, I might hardly see the LED mild, and at excessive packet charges, the fast flickering makes it seem continuously lit, decreasing its effectiveness as a sign indicator.

BetaFPV Nano TX V2 compatibility

Betafpv Nano Tx V2 Expresslrs Elrs Module Radio Transmitter

The Nano TX V2 seamlessly suits into radios with “Lite” exterior module bays, just like the Radiomaster Pocket that I used.

Betafpv Nano Tx V2 Expresslrs Elrs Module Jr Module Bay Adapter

For these with normal JR module bays (e.g., TX16S, Boxer, and Jumper T20S), an adapter is out there to accommodate the BetaFPV Nano TX V2 module, guaranteeing broad compatibility throughout varied transmitter fashions.

Get the adapter right here:

Energy Consumption

Energy consumption of the module varies with the RF energy stage, rising considerably at 250mW and above, primarily as a result of cooling fan kicking in.

Right here’s a breakdown of the present draw and precise RF output measured with an ImmersionRC Powermeter V2 throughout completely different energy ranges:

Energy Ranges RF Energy Present
25mW 26mW 0.19A
50mW 58mW 0.22A
100mW 106mW 0.3A
250mW 290mW 0.5A
500mW 533mW 0.62A
1000mW 1230mW 0.85A

Output Energy Testing

Betafpv Nano Tx V2 Expresslrs Elrs Module Output Power 1w Compare Radiomaster Ranger Nano

Earlier than conducting the output energy testing, I up to date the Nano TX V2 to the most recent ExpressLRS firmware model 3.3.2. When in comparison with the Radiomaster Ranger Nano module, the BetaFPV demonstrated superior RF output energy, initially exceeding 1.3W and stabilizing round 1.16W after 20 minutes of testing, showcasing its spectacular efficiency.

ExpressLRS Firmware Replace

Betafpv Nano Tx V2 Expresslrs Elrs Module Update Firmware Device Target Configurator

Updating the ExpressLRS firmware on the Nano TX V2 is simple.

Merely join the module to your laptop through the USB-C port, use the ExpressLRS Configurator, choose the BetaFPV 2.4GHz Nano TX V2 because the gadget, select UART as the tactic, choose the suitable COM port, and provoke the firmware flashing course of.

Gemini Mode Help?

The Nano TX V2 doesn’t help Gemini Mode.

For these on this function, I like to recommend testing the SuperG module, which I’ve not too long ago reviewed. Whereas extra pricey, the SuperG doesn’t essentially provide higher vary however does present improved redundancy and extra constant hyperlink high quality, particularly in interference-heavy environments. For pilots on a funds or these flying in areas with low RF noise, the Nano TX V2 stays a strong alternative.


In the event you’re out there for an inexpensive but high-performing ExpressLRS module, the BetaFPV Nano TX V2 stands out as a superb alternative. It delivers excellent output energy alongside well-designed options that improve the consumer expertise. As a Lite module, and with assistance from a JR to Nano module adapter, it’s primarily suitable with radios of all sizes. My solely grievance can be the noisy cooling fan, though it proves efficient in sustaining the module’s temperature.

You should purchase the BetaFPV Nano TX V2 module from:

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