Program Arduino boards without using traditional USB cables.
by Shubham Shinganapure
This is an image processing based fire detection and extinguisher system using Arduino and OpenCV.
great, hope you will get success in upload program to your arduino without usb cable. one more thing to attention here, baud rate is also important while sending the AT commands.
First make sure that your module is in at command mode, check your connections and try again.
I think it will be work fine for long code also, but take it's time to upload
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