UNZIP all files to a new directory on your machine. Follow the directions for your specific OS Windows: * Open the command line in windows and * Go to the directory where you unziped the files. * Connect the ZUM AMBE server board to your PC via a USB DATA cable. * Open Device Manager to find COM port of your board * Use the following line to flash the firmware onto your board. (Change the COM port in the following line.) esptool.exe --chip esp32 --port COM10 --baud 921000 write_flash 0 zumambev1.3.bin Linux: * Open a terminal * Go to the directory where you unzipped the files. * Type the follwing then press ENTER pip install esptool * Connect the ZUM AMBE server board to your PC via a USB DATA cable. * Type the follwing then press ENTER lsusb * Make a note of the serial port of your board. Will start with /dev/ttyUSB * Use the following line to flash the firmware onto your board. (Change the text following --port in the following line. Use the serial port of your board.) esptool.py --chip esp32 --port /dev/ttyUSB0 --baud 921000 write_flash 0 zumambev1.3.bin macOS: * Open a terminal * Go to the directory where you unzipped the files. * Type the follwing then press ENTER pip install esptool * Connect the ZUM AMBE server board to your Mac via a USB DATA cable. * Type the following then press ENTER ls /dev/cu.* * Make a note of the serial port of your board. Will start with /dev/cu.usbserial * Use the following line to flash the firmware onto your board. (Change the text following --port in the following line. Use the serial port of your board.) esptool.py --chip esp32 --port /dev/cu.usbserial-DM02IG0Y --baud 921000 write_flash 0 zumambev1.3.bin