433MHz Super Long Distance FHSS LoRa Wireless data modem with USB UART 5+ km range

We make new modem for diy use. Can be use as a transparent UART modem. Board have also USB to UART converter.

433MHz (414-454MHz) 100mW (20dBm) Super Long Distance LoRa Wireless data modem with USB and UART interface.



LoRa LRS series is a low cost, high performance transparent transceiver with operating at 433MHz. It is LoRa/FSK/ GFSK/OOK modulation variety. It features small size, high output power, high sensitivity, long transmission distance and most of the parameters can be set via the command. Receive and send data to automatically switch. U s e generic UART interface. It is easy to realize the wireless data transmission with only providing the UART data. It is flexible for the users to set the UART baud rate, output power, data rate, frequency select, modulation mode select etc parameters. It is your ideal choice for designing wireless data transmission products which can be widely used on wireless data transmission field.



  • Low cost, high performance , high reliability
  • LoRa/FSK/GFSK/OOK modulation, 2-way half –duplex communication, strong anti-interfere
  • Frequency Hopping Spread Spectrum
  • 414-454MHz ISM band,globally license free.
  • Maximal output power100mW(20dBm),output power adjustable between 2-20dBm
  • LORA Sensitivity -139dBm
  • Supply current for Tx 130mA@20dBm, 35mA@13dBm
  • Supply current for Rx 16mA
  • Low current sleep mode 2uA
  • Standard UART interface and USB interface
  • Operation frequency can be configured, acceptable for several modules working in different frequency with no disturbance on each other.
  • RF parameters as needed, users can be modulated by software
  • Easily use, auto exchange on communication & transceiver
  • Communication speed 1.2kbps -115.2kbps,can be modulated through software
  • Afford Sleep control signal,user self control work duty cycle
  • With LED indication
  • Longer transmission distance,over 5Km in open air
  • Small size 42x30mm, USB connector and 4 pin connector for UART
  • Weight 8 gramm
  • SMA antenna connector
  • Tuning free
  • Accord FCC,ETSI standard

Views: 12700

Comment by Darius Jack on March 20, 2016 at 11:56am

Are you ready to certify your data modem to meet FAA aircraft grade data modem standards and label it with

"Drone Certified" (TM)  Label

In December 2015 FAA upgraded status of DIY Drones to  DIY Aircraft Drone,

so any equipment installed in the drone should meet Aircraft Grade Standards set by FAA.

Comment by CSG on March 20, 2016 at 12:14pm

Accord FCC,ETSI standard

Comment by Olivier on March 20, 2016 at 12:44pm

> "In December 2015 FAA upgraded status of DIY Drones to  DIY Aircraft Drone, so any equipment installed in the drone should meet Aircraft Grade Standards set by FAA"

Darius, do you have a link for this?  Also, what is ""Drone Certified" (TM)  Label"? Thx.

Comment by Graham Dyer on March 20, 2016 at 1:09pm

@CSG, just ignore Darius, most of what he writes is not relevant.

Looks good, do you have a link and price? The RFD900 (which could perhaps be called an industry benchmark) has a power output of 1000mW, is this also capable of 1W power output? Also what software interface is used to adjust settings or is it compatible with Mission Planner?

Comment by Max Patissier on March 20, 2016 at 2:02pm

hi, place to buy it ?

Comment by Maarten Heuvelman on March 20, 2016 at 2:21pm

What is the difference with a normal 433MHz telemetry solution ??, can you make a comparisson table ?

5Km with 20dBm is nothing: The 5Km path loss at 433MHz is around 100dB (using isotropic antenna's) so with 20dBm transmission power you have -80dBm at the receiver input. I tested my 18$ "3DR radio telemetry..) solution with 0dBm TX power, over 11Km  with isotropic antenna's: works perfect (still 20 dB noise margin) as long as you have line of sight and no RF noise from your own PC. 

Comment by Sobido on March 20, 2016 at 2:28pm
Comment by Gregory Heide on March 20, 2016 at 3:38pm

ISM is 

  • 902 to 928 MHz
  • 2.400 to 2.4835 GHz
  • 5.725 to 5.875 GHz

Frequencies listed are in the Amateur Radio 70cm band, so where's the FCC part 15 registration?

Comment by Darius Jack on March 20, 2016 at 4:25pm


get full text of the Bill from Senate

testing goes back to AMA ..

so just call AMA and arrange for tests of your data modem installed into drone

Drone Certified (TM)  Standard should be applied to every hardware part intended for use with, or installation in a drone.

It makes sense not to install hardware parts not pretested to operate safely with a drone.



‘‘(4) each operator of a test site under section 44802; ‘‘(5) the Center of Excellence for Unmanned Aircraft Systems; ‘‘(6) unmanned aircraft systems stakeholders; and ‘‘(7) community-based aviation organizations. ‘‘(d) FAA APPROVAL.—Not later than 1 year after the date of enactment of the Federal Aviation Administration Reauthorization Act of 2016, the Administrator of the Federal Aviation Administration shall establish a process for the approval of small unmanned aircraft systems make and models based upon safety standards developed under subsection (a). The consensus safety standards developed under subsection (a) shall allow the Administrator to approve small unmanned aircraft systems for operation within the national airspace system without requiring the type certification process in parts 21 and 23 of the Code of Federal Regulations. ‘‘(e) ELIGIBILITY.—The standards for approval of small unmanned aircraft systems developed under this section shall set eligibility requirements for an airworthiness approval of a small unmanned aircraft system which shall include the following: 


Comment by Dan Banks on March 20, 2016 at 5:40pm

There is a narrow ISM band in zone 1 around 433/434 MHz (and a few others that Gregory didn't list above), but there is certainly NOT a global ISM band spanning 414-454 MHz, or even any global ISM band in any part of that range.  This device is almost certainly illegal to use in the U.S. without a license.

Given this glaring misrepresentation, I would be wary of any of the other claims presented.


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