ncSender Pendant Flasher

Flash firmware to your ESP32 device directly from the browser

Web Serial API is not supported in this browser.
Please use Google Chrome or Microsoft Edge (v89+).
Boot Mode Instructions
  1. Connect your pendant to your computer via USB cable.
  2. Locate the BOOT (or IO0) button and the EN (Reset) button on the board.
  3. Press and hold the BOOT button.
  4. While still holding BOOT, briefly press and release the EN (Reset) button.
  5. Continue holding BOOT for ~1 second, then release it. The device is now in flash/download mode.
If using an RJ12 connection, never insert the battery while the USB is connected — voltage imbalance can damage the chip.
Firmware
Drop your .bin file here or click to browse
Files under 3 MB → firmware update • Over 3 MB → full install (erase & flash)
Disconnected
Chip: — MAC: —
Preparing... 0%