Over two years in the past, BetaFPV launched their Nano TX ExpressLRS module to the world, and so they’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 evaluation.
Study extra about radio transmitters in FPV: https://oscarliang.com/radio-transmitter/
Study extra about ExpressLRS right here: https://oscarliang.com/setup-expresslrs-2-4ghz/
The place to Purchase?
You should buy the BetaFPV Nano TX V2 module from:
The BetaFPV Nano TX V2 is available in three frequency choices: 2.4GHz, 868MHz, and 915MHz. My evaluation focuses on the two.4GHz model, as it’s my frequency of alternative for the management hyperlink.
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 attenuate frequency deviation because of temperature variations for steady efficiency, and in addition deal with higher with sign interference with different units such because the VTX.
The V2 module helps ExpressLRS Backpack, which suggests you may 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) |
500mW |
| 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 identical aesthetic to its predecessor, that includes a white, injection-molded plastic shell and a light-weight construct at simply 28 grams.
A USB Sort-C port beneath the module facilitates firmware updates and exterior energy connectivity.
For prime RF energy calls for that sure older radios can’t meet, an exterior energy supply (7-13V) will 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.
The two.4GHz module makes use of an RP-SMA antenna connector, whereas the 868/915MHz variations are geared up with SMA connectors.
Two customizable buttons on the module permit for straightforward entry to features like Bind Mode, RF Energy adjustment, and VTX Settings modifications and so forth.
With the elevated transmission energy, the Nano TX V2 features a built-in cooling fan, mechanically 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
The Nano TX V2 introduces a first-ever characteristic: the “T-LED” antenna—a T antenna with an built-in LED gentle. 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 charge. The T-LED antenna presents a 2dBi acquire, and you may put commonplace (non-LED) antennas on the Nano TX V2 too.
Nevertheless, in my expertise, the practicality of the T-LED antenna is considerably restricted. Underneath daylight situations, I might hardly see the LED gentle, and at excessive packet charges, the fast flickering makes it seem always lit, lowering its effectiveness as a sign indicator.
BetaFPV Nano TX V2 compatibility
The Nano TX V2 seamlessly matches into radios with “Lite” exterior module bays, just like the Radiomaster Pocket that I used.
For these with commonplace JR module bays (e.g., TX16S, Boxer, and Jumper T20S), an adapter is offered 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 degree, growing 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 totally 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
Earlier than conducting the output energy testing, I up to date the Nano TX V2 to the newest 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
Updating the ExpressLRS firmware on the Nano TX V2 is easy.
Merely join the module to your laptop by way of the USB-C port, use the ExpressLRS Configurator, choose the BetaFPV 2.4GHz Nano TX V2 because the machine, select UART as the strategy, choose the suitable COM port, and provoke the firmware flashing course of.
Gemini Mode Help?
The Nano TX V2 doesn’t assist Gemini Mode.
For these on this characteristic, I like to recommend trying out the SuperG module, which I’ve just lately 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 price range or these flying in areas with low RF noise, the Nano TX V2 stays a strong alternative.
Conclusion
Should you’re available in the market for an inexpensive but high-performing ExpressLRS module, the BetaFPV Nano TX V2 stands out as a wonderful alternative. It delivers excellent output energy alongside well-designed options that improve the person expertise. As a Lite module, and with the help of a JR to Nano module adapter, it’s primarily appropriate with radios of all sizes. My solely grievance could be the noisy cooling fan, though it proves efficient in sustaining the module’s temperature.
You should buy the BetaFPV Nano TX V2 module from:
