Follow the instructions below to update your wi-ther to the latest firmware revision. You'll need to download and extract the firmware image linked above.
First download and install the esptool software. Then, open a terminal, to where you extracted the firmware from above. Run sh program-wi-ther.sh XXX where XXX is the path to your wi-ther's virtual serial port.
Open a command prompt, to where you extracted the above firmware file. Run program-wi-ther.bat XXX where XXX is the COM port of the wi-ther's virtual serial port. In case of any failure or error message, try again (up to five times).
