Hello,
I'd like know how to update uploaded B4R software on Arduino for commercial use(i.e. releasing new update and ask customers to upgrade to new version), what file should I use and how to upload it to Arduino.
Your clients will need to install and configure Arduino IDE. You can then send them the generated code.
They will need to find the correct serial port.
It is C code. You can compile the project with Arduino and see the hex file location in the compilation logs. There are tools that allow you to deploy hex files. I haven't tried it myself.
If there is a bootloader onboard, you can upload the hex file using this https://github.com/christophediericx/ArduinoSketchUploader
(command line utility, Windows)
or this: "Xloader" (very simple GUI).
Both work for just a few (but probably most popular) types of controllers.
Without a bootloader, you must upload the hex file using some ISP suitable programmer (e.g. AVRISP MKII for Atmel controllers), and having the six ISP pins exposed on the board.
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