Seeed XIAO C3 + Wio-SX1262

⚠️ Check that radio.rxgain(on) and flood.advert.base (0.308) are set correctly after flashing! ⚠️

This build is based on official MeshCore 1.15.0 dev branch (as of 25-May-2026 and additionally includes the following unmerged upstream PRs/changes:

• PR2553: Limit flood advert packet forwarding --> set flood.advert.base 0...1 (0: no flood adv. forwarding, 0.308: default, 1: all flood adv. forwarding)
• PR1810: Allow direct message paths when denyf * is set
• :new: PR1727: Use hardware channel activity detection for checking interference --> Use set int.thresh 1 to activate hw based channel activity detection.
• :new: PR2377: Disable NRF52 undervoltage bootlock feature

Additional changes:

• Flood adverts are disabled (flood.advert.interval set to 0) by default
• :new: modified PR1810 to not block flood adverts but only PAYLOADTYPEGRPTXT and PAYLOADTYPEGRPDATA so that some limited flood advert distribution can be managed via PR2553 to support e.g. observer maps.

Changelog:

• Based on dev v1.15.0 as of 25-May-2026

Full Changelog: https://github.com/mattzzw/MeshCore-Evo/compare/v1.15.0-evo0.1.20...v1.15.0-evo0.1.21

For beta testing, in progress...

Internal testing done. Beta testings with friends around the world. Flash Instruction: Download upgrade.bin to upgrade existing devices or freshInstall-merged.bin for new devices. Then Flash Custom Firmware.

• Source code: https://github.com/IoTThinks/MeshCore/tree/PowerSaving-v16

Based on MeshCore 1.16: https://blog.meshcore.io/2026/06/06/release-1-16-0 Plus:

• Repeaters and room servers for both ESP32 and NRF52: CLI powersaving on
• BLE companions for both ESP32 and NRF52: Enabled by default
• [NEW] Hibernate mode for ESP32 BLE Companions now work properly and at 16uA
• [NEW] Optimize Heltec T096 from 12mA down to 8.7mA
• [NEW] Repeaters for both ESP32 and NRF52: CLI set reboot.interval <hours>. hours is 0-255. 0 is default and disabled.
• [NEW] Set return path for repeaters: https://github.com/meshcore-dev/MeshCore/pull/2586
• [NEW] Add time keeping for NRF52 across resets: https://github.com/meshcore-dev/MeshCore/pull/2704
• FEM LNA for Heltec v4.3, Heltec T096, Heltec TrackerV2: CLI set radio.fem.rxgain on/off https://github.com/meshcore-dev/MeshCore/pull/2140
• Automatically select I2C address (0x76 or 0x77) for BME280, BME680 and BMP680.
• Fixed boot loop for Xiao C6: https://github.com/meshcore-dev/MeshCore/pull/2570
• Check reset reasons for repeaters: CLI powerlog
• Check I2C and GPS GPIOs: for repeaters: CLI sensor

Notes:

• Heltec v4 bin files is for both Heltec v4.2 and v4.3
• Heltec v4.3 bin files is for Heltec v4.3 only

Found issues:

• BLE companions seem can not sleep at all due to new code in MeshCore 1.16. Wio Tracker L1 is at 35mA instead of 7.5mA as in PowerSaving 15. Will investigate and fix.
• CMDSENDRAW_PACKET errors accumulate memory:

https://github.com/meshcore-dev/MeshCore/issues/2721. Fixed: https://github.com/meshcore-dev/MeshCore/pull/2722

Full Changelog: https://github.com/MichTronics/MeshCoreNG/compare/bridge-tcp-v1.0.5...repeater-v1.0.1

Full Changelog: https://github.com/MichTronics/MeshCoreNG/compare/bridge-tcp-v1.0.5...companion-v1.0.1

Full Changelog: https://github.com/MichTronics/MeshCoreNG/compare/bridge-tcp-v1.0.5...companion-v1.0.1

Full Changelog: https://github.com/MichTronics/MeshCoreNG/compare/bridge-tcp-v1.0.5...room-server-v1.0.1