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Update Instruction-to-flash-firmware.md

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IoTThinks authored and GitHub committed 2025-12-12 09:39:02 +07:00
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firmware/Instruction-to-flash-firmware.md
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## Instruction to flash custom firmware
### For ESP32-S3 based boards (Heltec v3, Heltec v4...)
## Instruction to flash firmware
### 1. For ESP32-S3 based boards (Heltec v3, Heltec v4...)
* To download **.bin** if you already flashed a repeater firmware before and want to KEEP the settings. Do NOT erase device if you want to keep the existing configuration
* To download **-merged.bin** if you flash for the FIRST TIME or you want to ERASE the flash and settings.
* Go to Web Flasher: https://flasher.meshcore.co.uk/
* Select Custom Firmware
<img height="384" alt="image" src="https://github.com/user-attachments/assets/d75c1b40-a349-488f-b623-77fbab06ddca" />
* Click Flash
<img height="384" alt="image" src="https://github.com/user-attachments/assets/a783b5a6-494e-44f7-b38c-63e4277039e1" />
### For NRF52840 based boards (RAK4631, T-Echo, T-Echo Lite...)
## 2. For NRF52840 based boards (RAK4631, T-Echo, T-Echo Lite...)
### Method 1:
* To download **.zip** file
* Go to Web Flasher: https://flasher.meshcore.co.uk/
* Select Custom Firmware
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* Click Flash.
<img height="384" alt="image" src="https://github.com/user-attachments/assets/de4eb8ac-e90d-44c2-91a3-2977cfecdf85" />
## Support
* The firmware is provided as it is without any warranty or support.
* If you want to support us or get your bug fixed, [Sponsor Us](https://github.com/sponsors/IoTThinks).
## Professional Services
* If you want custom development for your projects, [Contact Us](https://iotthinks.com/contact-us/)
### Method 2:
* To download uf2 file.
* To press some keys to enter DFU mode and open the NRF2BOOT folder. RAK: Press RESET twice. T-echo Lite: Press RESET, wait for 1s, then press RESET.
* To drop the uf2 file in the NRF2BOOT folder
* The device will auto reboot and close the NRF2BOOT folder.
<img height="192" alt="image" src="https://github.com/user-attachments/assets/4648416a-b906-46e6-84c1-a13f3a7a2a62" />