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Hi Hodaka, When you connect your bluetooth, it is supposed to show "Connected", so there is nothing wrong with that. If it shows notification, that means your app is still not connected to your Bluetooth module.And for display module, I used this one.https://www.electronicscomp.com/0.96-inch-i2c-oled-display-module-india?gclid=Cj0KCQjwpavpBRDQARIsAPfTwiwuIX5-0RGKvgIWQWagOCdH2BAiCSYhr36P3Pe07l6IMveRI7NVhF8aAhEZEALw_wcBI hope this might help.
Hi Divya, This program is made for HC-05 Module, that's the reason, it's not responding.
Because 9V battery is easily available in market compared to 5V battery, which I haven't used yet and don't know if it is available or not. Other than that we have multiple components for that power supply, so we need more current that's why we are using 9V battery.
Sorry my friend, I haven't used this one so far, so I can't say anything.
Those earphone are bluetooth earphones. It doesn't have any connection with program, just connect directly to your cell phone.
It's given in components section. SSD1306, 6 pin OLED display