The latest version of the AMBE 3000 Server is located here: http://ambeboard.zumradio.com/firmware/
That zip file contains the “zumambev1.3.bin” firmware as well as the program used to upload to the ESP32 chip on the board.
- Open Device Manger and observe what COM port shows up when the AMBE Server is plugged into the a USB port
- Copy the zumambev1.3.bin firmware and the esptool.exe programming tool to your user space (C:\Users\????? <==Whatever it is)
- Open a CMD window
- Type esptool.exe –chip esp32 –port COM3 –baud 921000 write_flash 0 zumambev1.3.bin (whatever the COM port should be, 3 in my case)
- Wait for it to finish, about 30 seconds in my case
This is the output you will see in the command window:
C:\Users\Bob>esptool.exe –chip esp32 –port COM3 –baud 921000 write_flash 0 zumambev1.3.bin
esptool.py v2.1
Connecting….
Chip is ESP32D0WDQ6 (revision (unknown 0xa))
Uploading stub…
Running stub…
Stub running…
Changing baud rate to 921000
Changed.
Configuring flash size…
Auto-detected Flash size: 4MB
Compressed 4194304 bytes to 1176415…
Wrote 4194304 bytes (1176415 compressed) at 0x00000000 in 18.3 seconds (effective 1833.9 kbit/s)…
Hash of data verified.
Leaving…
Hard resetting…
