SkyRelay Conduit

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Overview

SkyRelay Conduit is a compact, plug‑and‑fly device that integrates the LilyGo T‑SIM7600NA with SkyRelay’s firmware to connect a flight controller to cloud operations and expose MAVLink telemetry and commands over LTE.

Features

  • LTE MAVLink Telemetry — real‑time flight data over 4G LTE.

  • MAVLink TCP Relay — remote access via Mission Planner, QGroundControl, MAVProxy.

  • Bluetooth GCS Link — local MAVLink link without radio or LTE.

  • MQTT Cloud Streaming — live telemetry to the SkyRelay dashboard.

  • Remote ID Scanner — detects nearby ASTM F3411‑22a broadcasts.

  • SOS / Lost‑Drone Tools — buzzer alerts and QR‑code recovery.

  • OTA Firmware Updates — update over LTE or Webserial.

  • Data Saver Mode — reduced cellular bandwidth usage.

  • Automated Log Backups — Remote ID, UAV logs, and ArduPilot PARAM snapshots.

  • Network RTK Support — NTRIP corrections for high‑precision positioning.

  • RPIC SkyAssist — voice-enabled prompts to enhance situational awareness.

Supported Autopilots

  • ArduPilot

    • Copter

    • Plane

    • Rover

Technical Specifications

Spec

SkyRelay Conduit

Processor

ESP32-WROVER-E — dual-core 240 MHz, 4 MB flash, 8 MB PSRAM

Cellular

SIM7600NA (LTE Cat-1, 10/5 Mbps)

Bands

B2/B4/B5/B12/B13/B14/B25/B66/B71

Carriers

AT&T, T-Mobile, Verizon (US); Bell, Rogers, Telus, Videotron (Canada); Hologram global access

GPS

Integrated GNSS (GPS + GLONASS), ±2.5m CEP

Bluetooth

BLE 4.2

Battery

18650 LiPo, 8-12 hours standby

Buzzer

Active piezo

MAVLink

MAVLink2 via UART

Interface cable

4-pin JST SH1.0, 20 cm

Case

3D-printed enclosure with custom QR code

Dimensions

125 × 40 × 47 mm (4.9 × 1.6 × 1.9 in)

Weight

160 g (5.6 oz)
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Pinout

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The K01 Conduit crosses RX and TX internally. To connect it to an ArduPilot flight controller, follow these steps:

Step 1: Match the Cable to Your Flight Controller

The 4-pin UART-to-FC cable must match your FC’s telemetry port pinout. Order the pins in the connector as shown in wiring diagram:

  • Power and ground go to their counterparts

  • Conduit RX → FC RX

  • Conduit TX → FC TX

Step 2: Configure TELEM Settings

The Conduit communicates with the flight controller over MAVLink serial at 115200 baud. Set the parameters as follows:

where x represents the serial port

  • SERIALx_PROTOCOL = 2

  • SERIALx_BAUD = 115

To play SOS alert tones through the motors, enable the DShot option in NTF_BUZZ_TYPES for compatible DShot ESCs.

Step 3: Plug In and Mount

Plug the cable into the FC telemetry port and mount the Conduit on the airframe with the straps.

Step 4: Power On

Turn the power switch ON:

  • · · · · · · (HI) — buzzer confirms firmware is running

  • Bluetooth becomes available for a local GCS connection

  • Cellular modem connects to LTE

  • Cloud connected — — · — (K) confirms telemetry is streaming

Building Your Own (K02)

SkyRelay Conduit is also available as a bring-your-own-device path based on the LilyGo T-SIM7600NA platform. This option is suited to users who want to assemble the hardware themselves while still using the SkyRelay firmware and service flow.

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For BYOD instructions, see SKYRELAY Conduit manual

Videos

  • Activation and how it works:

  • SKYRELAY Conduit Wiring to Drone:

  • SKYRELAY features and how to connect over LTE MAVLink and GCS

Where to Buy