r/reticulum

So I've been reading about the new OTFS wireless signal modulation that's aimed at cellular 6G to replace OFDM. Kinda neat that the new modulation scheme has better immunity against time-based distortions like the doppler effect and immunity against signal reflections and back-scatter. It appears to be aimed at high-bandwidth applications instead of long-range like LoRa

...but I was thinking, it would be possible to use the chirp modulation within the delay-doppler domain. Enter "Chirp Delay-Doppler Domain Modulation" Seems exciting but I never graduated high-school so it's above my head quite a bit. There are some papers about it online. I kinda want to try it with GNU radio just for fun

Over the course of the past 2 years I've heard the name reticulum in reference to local WiFi capable cameras and I was intrigued but couldn't find much on it, now I've been looking into Meshtastic and meshcore and I've seen the name reticulum again. I apologize for not reading much into this community, I'm dysgraphic and dyslexic and the coding is a little rough to read at the moment. My main question is does it have the capability to voice call, and if so would that be a good use for the... Software? Firmware? I'm a burgening maker but I would really like my first exclusively electric make to be a cell phone alternative

So Rnode firmware has the ability to support multiple radio interfaces sumultaniously. The advantages are obvious and significant. Being able to run both a long range, low throughput, and a short range, high throughput lora network, simultaneously.

https://reticulum.network/manual/interfaces.html#rnode-multi-interface

I'm wondering if anyone's done this or knows of any build guides? I've never seen a lora device with multiple transceiver support? Or is it just a matter of having two entirely separate lora devices?

Open-Source Tactical Mesh Radio Node (LoRa/LR-FHSS + BLE, ESP32-S3)

I'm designing a pocket-sized mesh communicator built around the Semtech LR1121, meant for off-grid/contested-RF environments where cell and Wi-Fi aren't options.

Core idea: one small device, three operating modes:

• USB Modem — plug into a laptop/tablet
• BT Modem — pair with a phone via BLE 5.0
• Autonomous Relay — standalone mesh repeater, no host needed

RF layer (LR1121):

• Dual-band sub-GHz + 2.4GHz, hardware LR-FHSS for jam resistance (~3km range even under active jamming), plus GFSK for short-hop mesh relaying
• Adaptive channel activity detection to keep relay power draw under 10mA
• External PA option pushes LoS range to 15km in "hidden" (SF12) mode

Anti-jamming (multi-layer EW resistance): this is one of the core design pillars, with a stacked defense model:

• Waveform layer — adaptive spreading factor (up to SF12 for +15dB processing gain against broadband jammers), hardware frequency hopping across 335 channels at ~100µs hop rate (fast enough that even "follow-me" jammers can't react in time), and sub-5ms burst transmissions to dodge reactive jammers
• Timing/power masking — randomized TX intervals, power control, and padded/encrypted packet sizes to reduce fingerprinting
• Frequency agility — different countermeasures automatically selected depending on jammer type detected (broadband, spot, follow-me, reactive, or deceptive/spoofed preambles)
• Network resilience — per-link FEC and adaptive retransmission timing
• Traffic analysis protection — dummy cover traffic and fixed packet sizing so an observer can't tell when real messages are being sent, plus cryptographic verification to reject spoofed/deceptive jamming packets

Three tactical RF profiles, switchable depending on the threat environment:

• HIDDEN — low probability of intercept/detection: minimal power, no GFSK, heavy timing jitter + cover traffic, text-only voice
• NORMAL — balanced smart spectrum sensing, adaptive data rate, mesh relay available
• OVERRIDE ("unrestricted mode") — max aggression setting for emergencies: full hardware frequency-hopping + burst mode, max transmit power (up to +30dBm with external PA), TDMA micro-slots instead of listen-before-talk. Duty cycle automatically throttles down in hot ambient conditions (thermal + regulatory safety net) so the radio doesn't cook itself or the PA even when running "wide open."

Security: identity keys and cluster master key live in a dedicated secure element (ATECC608B) — physically tamper-resistant, keys get destroyed if someone tries to probe the chip. There's also a "panic beacon" that broadcasts a distress signal before self-destructing keys if the case is opened.

Time sync: implements the Flooding Time Synchronization Protocol (FTSP) to keep frequency-hopping nodes aligned across a mesh without needing GPS on every node.

Voice: three modes — push-to-talk (Codec2, <400ms latency), voice messages, and a "text voice" mode that does speech-to-text → compressed text over the mesh → text-to-speech on the receiving end (useful for very low-bandwidth/high-latency links).

Companion app: Flutter, cross-platform (Android/iOS/Windows/Linux/macOS), plus an ATAK plugin for tactical mapping integration. Networking runs on Reticulum (RNS).

Made something that I think a LOT of you are going to like.

In fact it's cracking so much new ground at once, that trying to explain it in writing would be extremely difficult and it'd be a long read.

Instead, if a picture's worth a thousand words, then a video will cover that same ground in a reasonable time. And it's wayyyy cooler to see the interactions this way!

Looking forward to seeing the feedback, especially for specific use cases this can help with (or where it'd need to close a gap to be helpful still)!