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Serial Telemetry Radio Kit - 915MHz, 500mW

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The Serial Radio Telemetry Kit is a small, lightweight, and inexpensive open source radio platform that can allow for ranges of better than 300m out of the box. The radio uses the very popular Si1000 chipset along with the open source SiK firmware. This firmware allows for a simple serial cable replacement to transmit any serial data including telemetry, RTK correction data (RTCM), or simple Serial.print() statements without any configuration required.

This telemetry kit includes two radio modules, a microB USB cable, microB OTG cable, two JST-GH cables, two right-angled RP-SMA connectors, and two 915MHz antennas. Each radio module in the kit features a transmit power of 500mW, a RX sensitivity of -117dB, a full duplex transparent serial link of 57600baud and are equipped with a microB USB and UART port for easy connectivity.

Both radios have a microB connector and use the FT23x USB to serial IC making it immensely easy to pass serial data from a remote radio to a base computer or cell phone. Radios are configured using simple AT commands. The provided JST-GH cables make connecting to the TX/RX pins of the radio a literal snap.

In order to use the Serial Telemetry Radio Kit, you'll need to cut the one of the provided JST-GH cables in half and tin the ends (for insertion into Arduino headers) or solder the connections to your remote unit (rover, weather station, Arduino, etc). Plug the other module into the USB port on your base station, computer, or cell phone.

A getting started guide is included in the Documents tab to help you set up this radio link for the Pixhawk drone controller but this link can be used for any serial data transmission.

  • 2x Radio Modules with Antennas
  • 1x Micro USB Cable
  • 1x Android OTG Adapter Cable
  • 1x GH 6P-GH 4P Cable
  • 1x MLX 6P-GH 4P Cable
  • 2x Right-Angled RP-SMA Connectors
  • 500 mW maximum output power (adjustable) -117 dBm receive sensitivity
  • Open-source SIK firmware
  • RP-SMA connector
  • 2-way full-duplex communication through adaptive TDM UART interface
  • Transparent serial link
  • MAVLink protocol framing
  • FT230X is a USB to BASIC UART IC
  • Interchangeable air and ground modules 915 or 433MHz
  • Micro-USB port
  • 4-position JST-GH connector
  • Supply voltage: 5V DC (from USB or JST-GH)
  • Transmit current: 100mA at 20dBm
  • Receive current: 25mA
  • Serial interface: 3.3V UART

Serial Telemetry Radio Kit - 915MHz, 500mW Product Help and Resources

Setting up a Rover Base RTK System

October 14, 2020

Getting GNSS RTCM correction data from a base to a rover is easy with a serial telemetry radio! We'll show you how to get your high precision RTK GNSS system setup and running.

How to Build a DIY GNSS Reference Station

October 15, 2020

Learn how to affix a GNSS antenna, use PPP to get its ECEF coordinates and then broadcast your own RTCM data over the internet and cellular using NTRIP to increase rover reception to 10km!

Core Skill: Programming

If a board needs code or communicates somehow, you're going to need to know how to program or interface with it. The programming skill is all about communication and code.

2 Programming

Skill Level: Rookie - You will need a better fundamental understand of what code is, and how it works. You will be using beginner-level software and development tools like Arduino. You will be dealing directly with code, but numerous examples and libraries are available. Sensors or shields will communicate with serial or TTL.
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Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

2 Electrical Prototyping

Skill Level: Rookie - You may be required to know a bit more about the component, such as orientation, or how to hook it up, in addition to power requirements. You will need to understand polarized components.
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Comments

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.

  • Is it 500mw or 100mw? Conflicting descriptions.

    • Says 500 on device, says 100 in quick start guide. Would also like clarity.

      • I would go for 500, as the tags also state 500. More than likely that the guide covers more than one version. It would be nice if SF would clarify it though. SF has changed over the last couple of years and that's why I don't purchase from here anymore. It's obvious that they don't read comments and reviews anymore. Even the spam is out of control.

        • The spam is definitely annoying. I zap it every morning, first thing.

          To your issue - the attached quick start lists 100 mW maximum output power. That said, you are correct that there are multiple versions and our internal datasheet for this one says 500mW.

          Sorry it took so long guys - we just missed this comment. We've been busy!

          • Is that why there is spam under this comment that states "2 weeks ago"?

            • SparkFun receives thousands of spam comments 24 hours a day, 7 days a week, 365.25 days a year. We do the best we can to catch them all but we don't work 24 hours a day and we don't work on holidays and weekends so you might see some spam for a bit until it gets deleted.

              Sometimes one or two spam comments might get missed as well, flagging them helps but some might get missed, just let us know and we can zap them. We're just a small collection of humans against an army of spam bots, than you for your patience and understanding.

            • Entirely possible. I just recently got involved. It's dependent on whatever else I have going on, so while I do try to check in every day, I sometimes miss things. We're working on it, but those buggers are persistent.

  • Can pairs of these devices be mixed and matched between the pairs that ship in each box, without any reconfiguration? In other words, if I buy two pairs of these radios (four in total, let's call them Pair1RadioA Pair1RadioB Pair2RadioA Pair2RadioB), can Pair1RadioA communicate with Pair2RadioA without reconfiguration? I am not asking about one-to-many, only about mixing one-to-one pairs. Thanks!

  • chip / last month / 1

    Do these radios have an FCC ID? If so what is it?

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