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 assessment.
Be taught extra about radio transmitters in FPV: https://oscarliang.com/radio-transmitter/
Be taught 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 assessment focuses on the two.4GHz model, because 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 Fee (2.4GHz): As much as 1000Hz
- Packet Fee (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 because of temperature variations for steady 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 possibly can 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 analogous 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 top RF energy calls for that sure older radios can not meet, an exterior energy supply (7-13V) might be related utilizing the offered 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 possibility 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 enable for simple entry to features like Bind Mode, RF Energy adjustment, and VTX Settings adjustments and so forth.
With the elevated transmission energy, the Nano TX V2 features a built-in cooling fan, routinely activated at 250mW or greater by default. Though efficient in protecting 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 meant for pilots to visually monitor their sign throughout flight, with the LED flickering to point information transmission and reception. The flickering pace varies based mostly on the telemetry ratio and packet charge. The T-LED antenna affords a 2dBi achieve, and you possibly can put commonplace (non-LED) antennas on the Nano TX V2 too.
Nonetheless, in my expertise, the practicality of the T-LED antenna is considerably restricted. Underneath daylight situations, I may hardly see the LED gentle, and at excessive packet charges, the speedy flickering makes it seem always lit, decreasing its effectiveness as a sign indicator.
BetaFPV Nano TX V2 compatibility
The Nano TX V2 seamlessly suits 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 on the market 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, rising considerably at 250mW and above, primarily because of the 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 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
Updating the ExpressLRS firmware on the Nano TX V2 is simple.
Merely join the module to your pc 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 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 characteristic, I like to recommend testing the SuperG module, which I’ve not too long ago reviewed. Whereas extra pricey, the SuperG doesn’t essentially supply 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 stable alternative.
Conclusion
If you happen to’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 can 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:
