Serial Telemetry Radio Kit - 915MHz, 100mW

The Serial Radio Telemetry Kit is a small, lightweight, and inexpensive open source radio platform that can transmit serial data more 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 100mW, 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
  • 100 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, 100mW 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.
See all skill levels

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.
See all skill levels


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.

  • Member #631347 / about 3 years ago / 1

    In your 2018 product showcase video Pete asked the public to let you guys know if there was interest in this item. Now that you carry the 100mW version, any plans to add the 500mW version to your store front? Thanks

  • chip / about 3 years ago / 1

    Do these radios have an FCC ID?

    • santaimpersonator / about 3 years ago / 1

      Unfortunately, we don't have any product in to check. However, this question might be best directed at the manufacturer, as it might not be labeled on the enclosure anyways:

  • Member #24015 / about 4 years ago / 1

    I was hoping I could just use this as a transparent serial link. I'm looking for a simple way to send RTCM data from one "SparkFun GPS-RTK Board - NEO-M8P-2" board (basestation) to another (rover) as an RTK setup. So when I connect the USB cables to a PC and it enumerates a virtual COM port then I can send serial data at 57600 baud from one HyperTerminal session to another - nice! When I'm sending this data, on a single Radio Module I hook up an O-scope to both the TX and RX pins and I see that both are outputting 3.3V serial data. I would have expected one to be an input and the other an output. Not both as outputs. I get the same result if I use the USB port just to power the Radio Modules through a USB power wart - both are outputs. Does this make sense?

    • Member #436035 / about 3 years ago / 1

      I'm facing similar issues when trying to use this set with GPS-RTK2 board. Have you found a solution to this problem yet?

Customer Reviews

No reviews yet.