Update Instruction-to-flash-firmware.md

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IoTThinks authored and GitHub committed 2026-06-02 15:51:33 +07:00
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@@ -29,6 +29,7 @@ RAK4631, Heltec T114, T-Echo, T-Echo Lite...
### Method 1: OTA
For repeaters / room servers, you can upgrade via OTA if in range of the repeaters / room servers's BLE
* Enter CLI "start ota"
* You may need to use [OTAFix](https://github.com/oltaco/Adafruit_nRF52_Bootloader_OTAFIX) before being able to do OTA for some boards
* Use "nRF Device Firmware Update (DFU)" to upload the **upgrade.bin** file (not uf2 file)
### Method 2: Zip file