Meshtastic port targets Semtech LR2021 kit with nRF54L15 support

A new Meshtastic port is pushing into Semtech’s LR2021 LoRa Plus Evaluation Kit, pairing the chipmaker’s latest radio with Nordic’s nRF54L15 and giving the community a first look at what future mesh hardware could look like.

The discussion landed in Meshtastic firmware on May 24, started by dasmensch-su, and it pointed readers to a separate repository called Meshtastic-nRF54L15-LR2021-Multi-SF. There were no replies in the thread when it appeared, but the project title alone makes the direction clear: this is a port aimed at the Seeed Studio Semtech LR2021 LoRa Plus Evaluation Kit, with multi-spreading-factor work built into the experiment.

That matters because the LR2021 is not an old part waiting on shelf space. Semtech launched it on March 10, 2025 as the first chip in its LoRa Plus family, and the company positions it as a fourth-generation LoRa IP transceiver for terrestrial and SATCOM networks. The part supports sub-GHz, 2.4 GHz ISM, and licensed S-band operation, along with FLRC speeds up to 2.6 Mbps. Semtech also says the chip can reach improved LoRa sensitivity down to -141.5 dBm at SF12/125 kHz.

The evaluation kit behind the port is equally concrete. Semtech says the LR2021 LoRa Plus Evaluation Kit includes 2 Wio-LR2021 modules, 2 XIAO nRF54L15 modules, 2 expansion boards, 2 2.4 GHz antennas, 2 915 MHz antennas, USB cables, and documentation. It is configured for North America US915 and global 2.4 GHz ISM bands, which makes it a practical bench for testing how Meshtastic behaves across both familiar sub-GHz terrain and the newer 2.4 GHz space.

The timing also lines up with where Meshtastic itself is headed. Meshtastic describes its project as an open-source, off-grid, decentralized mesh network for affordable, low-power devices, and its firmware already supports more than 100 devices. The develop branch now includes nRF54L15 platform work, and a separate nRF54L15 discussion showed the port running far enough to connect to the Meshtastic iPhone app.

For the community, the immediate value is not a finished product on store shelves. It is proof that Meshtastic builders are already bringing up newer Nordic silicon and Semtech’s newest radio family on real hardware. That kind of early port is often where the next tracker, handheld, gateway, or relay begins, and this LR2021 work suggests the hardware horizon is still widening.