Meshcore-T-Beam-1W-Firmware Ver 1.15.0

Changelog - T-Beam 1W Firmware

All notable changes to the MeshCore T-Beam 1W firmware will be documented in this file.

[1.15.0] - 2026-05-07

Updated

• Merged upstream MeshCore v1.15.0 from meshcore-dev/MeshCore
• Rebuilt and verified all T-Beam 1W SX1262 target variants:
  • T_Beam_1W_SX1262_companion_radio_ble
  • T_Beam_1W_SX1262_companion_radio_usb
  • T_Beam_1W_SX1262_repeater
  • T_Beam_1W_SX1262_room_server
• Generated new merged firmware artifacts:
  • T-Beam-1W-CompanionBLE-v1.15.0-merged.bin
  • T-Beam-1W-CompanionUSB-v1.15.0-merged.bin
  • T-Beam-1W-Repeater-v1.15.0-merged.bin
  • T-Beam-1W-RoomServer-v1.15.0-merged.bin

Upstream Changes (v1.14.1 → v1.15.0)

• Default Scope support
• New GROUP_DATA binary packet support
• Radio rxgain now enabled by default
• Radio frequency range extended down to 150 MHz
• New get|set dutycycle CLI command
• WiFi companion fixes for Heltec V4 and T-Beam 1W
• nRF companion OTA update support
• Additional sensor, board support, and stability fixes

T-Beam 1W Specific Changes

• Added SX126X_REGISTER_PATCH=1 for a more stable SX1262 noise floor
• Added USE_SX1262 to the shared T-Beam 1W SX1262 build flags
• Added T_Beam_1W_SX1262_companion_radio_usb build target
• Switched from min_spiffs.csv to default_16MB.csv to use the full 16MB flash
• Fixed boards/t_beam_1w.json to use the generic Arduino esp32s3 variant so all SX1262 targets build correctly
• Preserved and integrated T-Beam 1W fan control support in all three runtime loops:
  • Companion
  • Repeater
  • Room Server
• Updated the fan thermostat to use MCU temperature with hysteresis:
  • Fan turns ON at 45°C
  • Fan turns OFF below 41°C
  • Minimum runtime remains 5s

Technical Details (T-Beam 1W Specific)

• Flash Mode: DIO (Dual I/O)
• Flash Size: 16MB
• Flash Frequency: 80MHz
• Chip: ESP32-S3
• Board: LilyGo T-Beam 1W with SX1262 LoRa radio