The Current State of Mesh
on Pisces Moon

Honest accounting of the current limitations. Each item is on the roadmap; none of these is a permanent state.

Same radio modulation

The #LongFast channel on Pisces Moon uses the same LoRa physical-layer parameters as Meshtastic's LongFast preset: 906.875 MHz center frequency in the US 902–928 MHz band, bandwidth 250 kHz, spreading factor 11, coding rate 4/5, with the same sync word. At the layer of LoRa physical-layer modulation, Pisces and Meshtastic are interoperable — packets sent by one are demodulated cleanly by the other.

Same packet header on #LongFast

Pisces uses the 16-byte Meshtastic header structure (flags, channel hash, nextHop, relayNode fields) with the LongFast channel hash 0x02. At the packet-header layer, Pisces packets on #LongFast look like legitimate Meshtastic packets.

Same regional band

Pisces Moon uses the 902–928 MHz US sub-GHz ISM band with the LongFast channel centered at 906.875 MHz, and supports configuration for the EU 868 MHz band. This matches Meshtastic's regional band defaults.

Same kind of mesh philosophy

Both projects use unlicensed LoRa to provide off-grid peer-to-peer messaging without cellular, WiFi, or internet infrastructure. Both target hobbyist, prepper, hiker, and off-grid communication use cases.

Same hardware family

Both run on ESP32-based LoRa-capable devices. Pisces Moon currently supports T-Deck Plus, T-LoRa Pager, and the Cardputer ADV with the Cap LoRa-1262 expansion. Meshtastic supports a wider hardware lineup including dedicated Heltec and LilyGO LoRa boards.

Pisces is a full operating system; Meshtastic is a single-purpose firmware

When you flash a device with Meshtastic, the device becomes a Meshtastic node and does nothing else. When you flash Pisces Moon, you get a multi-app operating system with wardriving, GPS logging, file management, games, an audio recorder, and a Mesh Messenger as one of many apps. The Mesh feature is a piece of a larger handheld computing experience.

Pisces channels are plaintext walkie-talkie style

Channels 1–3 in Pisces Mesh do not use the encryption layer that Meshtastic applies to its default channel. This is intentional for the use case Pisces is targeting — quick, low-friction messaging between people who know each other, with no key exchange, no setup, no "did you get the channel invite." Think of it as a digital walkie-talkie for a family, a group of friends, or a small team. Most users do not need protocol-enforced encryption for "are you ready for dinner?"

Pisces does not yet implement the full Meshtastic protocol

As of May 20, 2026, the Meshtastic-compatible work in Pisces Moon is limited to radio-layer compatibility and "heard nodes" visibility. Full message decode/encode, node info beacons, and multi-hop routing on the Meshtastic protocol are on the roadmap but not yet implemented.

Pisces is alpha; Meshtastic is mature

Meshtastic has been in active development since 2019, has a large community, and ships polished firmware with extensive documentation. Pisces Mesh started as a proof-of-concept and is still hardening. If you need a mature off-grid messenger today, install Meshtastic. If you want to experiment with what a handheld OS can do with a mesh layer integrated into a larger system, Pisces Moon is the project.

During v1.2.0 planning, the right approach was identified as a layered build-out rather than a single big-bang interop release. As of v1.2.0:

Meshtastic is the dominant project in this space and the de facto reference implementation for LoRa mesh messaging on ESP32-class hardware. Honoring radio-layer compatibility with Meshtastic means Pisces Moon users have a path to participating in the wider mesh community as Pisces development progresses. It would be possible to build a Pisces-only mesh that ignores Meshtastic entirely, but that would be choosing isolation over interoperability for no good reason.

Meshtastic is also AGPL-licensed software, like Pisces Moon. Where Pisces Moon's mesh layer takes inspiration from or follows Meshtastic's protocol conventions, credit is given in the project license and source comments. See the Pisces Moon LICENSE document for details.

1. Flash Pisces Moon OS v1.2.0 onto two or more supported devices (T-Deck Plus, T-LoRa Pager, or Cardputer ADV with Cap LoRa-1262).
2. Open the Mesh Messenger app from the launcher.
3. Both devices default to #LongFast (channel 0).
4. Type a message on one device, press Enter to send.
5. The message should appear on the other device within 1–2 seconds.
6. Switch channels with Tab key on T-Deck Plus and Cardputer ADV, or the rotary wheel on T-LoRa Pager (scroll up = previous, scroll down = next).

If you have a stock Meshtastic device, send a message from it on the default LongFast channel. You should see a ~node row appear in the Pisces Moon Mesh view indicating raw or encrypted traffic was heard. The message content will not display because Pisces cannot yet decrypt or parse Meshtastic-format payloads — but the ~node row confirms your radio settings are correct and Meshtastic traffic is reaching you.

Pisces Mesh is a real, working, peer-to-peer LoRa messenger. It runs on three different devices. It writes durable transcripts to SD card. It is part of a larger handheld operating system, not a single-purpose firmware. It shares the LongFast radio settings with Meshtastic but does not yet share the application-layer protocol that would make full message interop possible.

We are honest about what works and what does not. The walkie-talkie use case is solid today. The full Meshtastic interop story is in active development. Watch the changelog at fluidfortune.com for updates as the layers come online.