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LoRa 1W Breakout - 915M30S

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Do you need power? This breakout for the 915M30S module from EBYTE is a 1W (30dBm) LoRa transceiver. LoRa is great for long range (miles), low power (in sleep), and low data rates (~500bps). This breakout board is designed to connect to any platform that has SPI and 6 available GPIO. We include a robust edge mount RP-SMA connector to connect large LoRa (915MHz) antennas. In addition, the on-board U.FL connector can be used if you need to get outside a metal enclosure.

We've successfully broadcast 12 miles line-of-sight (thank you foothills!) using this module but your results may vary.

Our example sketches make quick work of the initial setup for the SX1276 LoRa transceiver from Semtech, and the RadioLib Arduino Library makes advanced configuration and protocols (AX.25, Hellschreiber, Morse, RTTY, and SSTV) a cinch too!

We do not plan to regularly produce SparkX products so get them while they’re hot!

Experimental Product: SparkX products are rapidly produced to bring you the most cutting edge technology as it becomes available. These products are tested but come with no guarantees. Live technical support is not available for SparkX products. Head on over to our forum for support or to ask a question.
  • SPX1276 Based Design
  • 915MHz center band
  • 1W Power Amplifier
  • Robust RP-SMA connector
  • On-board U.FL connector (requires moving a 0Ω resistor)


Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • So I understand with different TX power the SPX-18574 could possibly not reach back SPX-18572 (LoRa 1W Breakout - 915M30S) but they should be able to communicate with each other over a close distance? Can you confirm?

    • Correct. We've had the 100mW Mini Shield happily chirping to the 1W breakout. I think most any LoRa radio, based on nearly any chipset but specifically Semtech ICs (eg: SX126x, SX127x, SX128x) can talk to each other when setup with compatible settings.

  • Should we connect both power sources? 5vdc and 3.3vdc? I have both voltages available but my MCU is a 3.3vdc MCU.

    • Nate / last month / 1

      The datasheet is your friend. 5V is used to power the amplifier and should be 3.3 to 5V, but as close to 5V as possible for max transmission. Data/logic pins are 3.3V max (tho they do say you can put a 1k on 5V logic lines).

  • 1W (30dB) I see you have implied decibels relative to 1 milliwatt and suggest revising the unit in the description: 1W (30dBm)

  • It would be cool to see some really long range walkie talkies with this module.

  • LoRa is great for long range long range (miles), low power (in sleep). Is "long range long range" a typo?

  • 1 Watt sounds good, how does that compare to the lora explorable or the sparkfun pro rf? Would it give greater range?

    • 1W gives you considerable more range. Most LoRa modules, including the ones we sell, are 100mW. It's not linear (10x power doesn't mean 10x range) but it's quite a lot more range.

      • Hi Nate. Can you confirm that the Document file “Example Sketch showing power amplifier control” is the needed code to get the best distance?

        Also, wiring — on the back there is 5v and 3.3v pins .. are both required? If one is looking for the most simple hook up with wires , just need 3.3v ground SDI/SOO/ScK /CS or does it also require 5v?

        • 'Best' is tricky, but yes, the example sketch is what we've used for our testing. It demonstrates how to set the library to use the power amplifier control pins. The .setOutputPower(20) could be increased but I'd have to check the library for the max value it accepts. I suspect the setOutputPower is controlling the amp in the SPX1276 and not the external power amp (that's what TXEN and RXEN are used for) so the demo sketch should be very nearly at the max.

          5V is required to power the module. 3.3V is required if you need to use the onboard pullups. For example, if you do not connect 3.3V and you do not connect RESET, reset will be left floating and you may run into problems.

          RXEN and TXEN are optional, but if you don't connect them, you might as well buy the 100mW module ;)

        • Edit- Additionally hooking up the RXEN and TXEN I do see that is required

    • Yes, 1 Watt is a lot more power. The Rfm 9x on the pro rf is only 100mW. This thing is 10 TIMES MORE POWERFUL (but does not give you 10 times more distance) Also, SparkX made a board with this module a long time ago, but they retired it. I am glad they brought this BEAST back!

      • Indeed. We have a few new plans for this beast.

        • Had a friendly request fo the description to add a warning/notice — if I am not mistaken 1W transmit power is the maximum power and used with any kind of “ directional antenna“ with this product ^i(f at max power) would exceed the allowed “directional radiation power” ?

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