Lynx RPi5 Dual RX - Revision history

G8YTZ at 15:17, 27 July 2026

2026-07-27T15:17:32Z

G8YTZ at 15:09, 27 July 2026

2026-07-27T15:09:47Z

G8YTZ at 08:17, 22 July 2026

2026-07-22T08:17:37Z

G8YTZ: /* Credits */

2026-07-22T06:26:08Z

Credits

G8YTZ at 06:25, 22 July 2026

2026-07-22T06:25:18Z

G8YTZ: Alpha v0.e

2026-07-21T15:24:09Z

Alpha v0.e

G8GKQ: Created page with "The Lynx receiver is a DATV receiver being developed by Justin G8YTZ. As of July 2026 it was in early prototype form and not released. The hardware includes a Raspberry Pi 5..."

2026-07-16T13:33:48Z

Created page with "The Lynx receiver is a DATV receiver being developed by Justin G8YTZ. As of July 2026 it was in early prototype form and not released. The hardware includes a Raspberry Pi 5..."

New page

The Lynx receiver is a DATV receiver being developed by Justin G8YTZ. As of July 2026 it was in early prototype form and not released.

The hardware includes a Raspberry Pi 5 with display, network connected to a PicoTuner with G4EWJ's ethernet interface.

Features include diversity reception across the tuner's 2 inputs.

@@ Line 1: / Line 1: @@
 == Lynx and Knobler ==
-'''Lynx''' is a Raspberry Pi-based control and monitoring package for amateur DATV reception, and '''Knobler''' is its companion hardware remote — a small rotary-dial display unit built on the M5Stack M5Dial. Together they turn a Picotuner-based DATV receiver into a system you can watch and control without a laptop or the Pi's own web UI open in front of you.
+'''Lynx''' is a full DATV receiver for the Raspberry Pi 5 — not a control panel bolted onto someone else's decoder, but the whole receive chain: tuning, decoding, a genuine live picture on screen, and, when you want it, real diversity reception — two independent tuner inputs combined automatically, so a fade on one path doesn't have to mean losing the shot. Pair it with '''Knobler''', its companion rotary-dial remote built on the M5Stack M5Dial, and you've got a receiver you can actually run from across the room — glance at it, spin the dial, get on with your day.
 This page gives a brief overview of both. See [[#Getting_Started|Getting Started]] below for setup instructions.
 === Get Started ===
 * '''Lynx''' — [https://github.com/G8YTZ/lynx-datv-receiver source code, install guide, and full documentation]
 * '''Knobler''' — [https://github.com/G8YTZ/lynx-knobler source code]
-* New to Lynx? The [https://github.com/G8YTZ/lynx-datv-receiver/raw/main/docs/lynx_install_guide.docx Installation Guide] takes you from a blank SD card to a working receiver, including a one-line installer.
+* New to Lynx? The [https://github.com/G8YTZ/lynx-datv-receiver/raw/main/docs/lynx_install_guide.docx Installation Guide] takes you from a blank SD card to a working receiver in one sitting, including a one-line installer.
 === Lynx ===
-Lynx runs on a Raspberry Pi and sits between the Picotuner hardware and the operator, providing:
+Built around the Picotuner, Lynx gives you a full receiver, not just a viewer:
 * A local web UI (default port 8080) for status, tuning, and configuration

@@ Line 1: / Line 1: @@
-= Lynx and Knobler =
+== Lynx and Knobler ==
 '''Lynx''' is a Raspberry Pi-based control and monitoring package for amateur DATV reception, and '''Knobler''' is its companion hardware remote — a small rotary-dial display unit built on the M5Stack M5Dial. Together they turn a Picotuner-based DATV receiver into a system you can watch and control without a laptop or the Pi's own web UI open in front of you.
-This page gives a brief overview of both. See the [[#Getting Started|Getting Started]] section below for setup instructions.
+This page gives a brief overview of both. See [[#Getting_Started|Getting Started]] below for setup instructions.
-== Lynx ==
+=== Get Started ===
 Lynx runs on a Raspberry Pi and sits between the Picotuner hardware and the operator, providing:
@@ Line 18: / Line 24: @@
 Configuration lives in a single YAML file covering site details (callsign, locator, location), the Picotuner connection, presets, streams, diversity settings, and notification integrations.
-== Knobler ==
+Full documentation, including an install guide, a Web UI reference, and a guide to the on-screen display, is kept alongside the source: [https://github.com/G8YTZ/lynx-datv-receiver/tree/main/docs docs folder on GitHub].
 Knobler is a physical companion display for Lynx, built on an [https://docs.m5stack.com/en/core/M5Dial M5Stack M5Dial] — a small ESP32-based device with a round touchscreen and a rotary encoder. It polls Lynx's web API directly and gives you a dedicated, always-on physical readout and control surface, separate from the web UI.
@@ Line 29: / Line 37: @@
 * Automatic discovery of the Lynx receiver on the local network — no need to hardcode or manually enter an IP address
-=== Wi-Fi Setup ===
+==== Wi-Fi Setup ====
 On first boot (or if it can't find a previously-saved network), Knobler opens a temporary Wi-Fi access point of its own and displays a short prompt on screen. Connecting a phone or laptop to that access point brings up a normal Wi-Fi configuration page, where you select your network from a list and type in the password on a proper keyboard — rather than fumbling through SSID entry on a 1.28" touchscreen.
@@ Line 35: / Line 43: @@
 Once configured, credentials are saved on the device. If the saved network ever becomes unreachable (moved out of range, router replaced, etc.), Knobler automatically falls back into setup mode after a short timeout, without any need to reflash or reconfigure it by hand.
-=== Auto-Discovery ===
+==== Auto-Discovery ====
 Rather than requiring a fixed, manually-entered IP address for the Lynx receiver, Knobler broadcasts a small discovery request on the local network on startup. Any Lynx instance running current software answers directly, providing its name, callsign, IP address, and API port — so Knobler finds the right receiver automatically, even if its address changes (e.g. after a router reboot hands out a new DHCP lease).
-== Getting Started ==
+=== Getting Started ===
 '''Requirements:'''
 * An M5Stack M5Dial device and USB-C cable
 * Arduino IDE, with ESP32/M5Stack board support and the required libraries (M5Dial, WiFiManager, ArduinoJson) installed
 * A Lynx receiver running current software (the discovery responder must be present — see below)
 * A computer or phone to complete Wi-Fi setup
 '''Before flashing Knobler:''' make sure the Lynx receiver is running a version of the software that includes the discovery responder (it prints a line similar to <code>Discovery responder listening on UDP :9998.</code> on startup). Older Lynx installs will need updating first, or Knobler won't be able to find them automatically.
-A full step-by-step installation guide — covering Arduino IDE setup, board/library installation, flashing, and first-time Wi-Fi configuration — is available separately: '''[insert link to installation guide here]'''.
+A full step-by-step Knobler installation guide — covering Arduino IDE setup, board/library installation, flashing, and first-time Wi-Fi configuration — is not yet published separately; for now, see the [https://github.com/G8YTZ/lynx-knobler Knobler repository] directly.
-== Status ==
+=== Status ===
 Both projects are under active development. Known limitations at time of writing:
@@ Line 58: / Line 69: @@
 * There is currently no on-device way to force Knobler back into Wi-Fi setup mode (e.g. to deliberately switch networks) short of clearing its saved credentials via a computer.
-== See Also ==
+=== See Also ===
-* [link to Lynx source/repository - coming soon!]
+* [https://github.com/G8YTZ/lynx-datv-receiver Lynx source code and documentation on GitHub]
-* [link to Knobler source/repository - coming soon!]
+* [https://github.com/G8YTZ/lynx-knobler Knobler source code on GitHub]
 * [[Picotuner]]
-== Credits ==
+=== Credits ===
-''[Justin D. Cockett - G8YTZ]''
+''Justin D. Cockett - G8YTZ''
 [[Category:DATV]]
 [[Category:Receivers]]

@@ Line 60: / Line 60: @@
 == See Also ==
-* [insert link to Lynx source/repository]
+* [link to Lynx source/repository - coming soon!]
-* [insert link to Knobler source/repository]
+* [link to Knobler source/repository - coming soon!]
 * [[Picotuner]]

@@ Line 66: / Line 66: @@
 == Credits ==
-''[insert author/maintainer attribution here]''
+''[Justin D. Cockett - G8YTZ]''
 [[Category:DATV]]
 [[Category:Receivers]]

@@ Line 1: / Line 1: @@
-The Lynx receiver is a DATV receiver being developed by Justin G8YTZ.  As of July 2026 it was in early prototype form and not released.
+= Lynx and Knobler =
-The hardware includes a Raspberry Pi 5 with display, network connected to a PicoTuner with G4EWJ's ethernet interface.
+'''Lynx''' is a Raspberry Pi-based control and monitoring package for amateur DATV reception, and '''Knobler''' is its companion hardware remote — a small rotary-dial display unit built on the M5Stack M5Dial. Together they turn a Picotuner-based DATV receiver into a system you can watch and control without a laptop or the Pi's own web UI open in front of you.
-Features include diversity reception across the tuner's 2 inputs.
+This page gives a brief overview of both. See the [[#Getting Started|Getting Started]] section below for setup instructions.
-Attached is the Alpha software for the “Pi 5 Lynx” DATV Receiver that I have been working on. You’ll need a Pi 5 with 4GB RAM and a 32GB SD card. In theory a 2GB Pi 5 will work, but will be come a problem as I add new features. PicoTuner with ethernet - latest code required.
+== Lynx ==
-Known issue to be aware of: On first boot/tune in Diversity mode one tuners may not lock, we’ve implemented a workaround, by sending the tune command twice on boot, but the core issue seems that the PicoTuner cannot reliably cope with a second tune command whilst acquiring/locking the first signal.
+Lynx runs on a Raspberry Pi and sits between the Picotuner hardware and the operator, providing:
-Readme Folder:
+* A local web UI (default port 8080) for status, tuning, and configuration
-Installation Instructions for the Alpha testers
+Configuration lives in a single YAML file covering site details (callsign, locator, location), the Picotuner connection, presets, streams, diversity settings, and notification integrations.
-best regards
+== Knobler ==
-Justin Cockett - G8YTZ
+Knobler is a physical companion display for Lynx, built on an [https://docs.m5stack.com/en/core/M5Dial M5Stack M5Dial] — a small ESP32-based device with a round touchscreen and a rotary encoder. It polls Lynx's web API directly and gives you a dedicated, always-on physical readout and control surface, separate from the web UI.

← Older revision		Revision as of 15:24, 21 July 2026
Line 4:		Line 4:

	Features include diversity reception across the tuner's 2 inputs.		Features include diversity reception across the tuner's 2 inputs.
		+
		+	Attached is the Alpha software for the “Pi 5 Lynx” DATV Receiver that I have been working on. You’ll need a Pi 5 with 4GB RAM and a 32GB SD card. In theory a 2GB Pi 5 will work, but will be come a problem as I add new features. PicoTuner with ethernet - latest code required.
		+
		+	Known issue to be aware of: On first boot/tune in Diversity mode one tuners may not lock, we’ve implemented a workaround, by sending the tune command twice on boot, but the core issue seems that the PicoTuner cannot reliably cope with a second tune command whilst acquiring/locking the first signal.
		+
		+	Readme Folder:
		+
		+	Installation Instructions for the Alpha testers
		+	Web UI documentation - what all the bits do
		+	Lynx Features (quite old now, but sets the scene)
		+	Lynx Diversity manual - details of the Lynx Diversity feature and the journey so far.
		+	Lynx Diversity Progress Report - a bit historical now, but explains why we changed to PCR from packet sequence combining. My original idea was we could generate wall-clock sequence numbers by generating check sums from the packet sequence, but PCR was much simpler to implement.
		+
		+	best regards
		+
		+	Justin Cockett - G8YTZ