![Standalone Arduino with ATMEGA328P / Serial working, but serial programming not (only once after buning bootloader) - Arduino Stack Exchange Standalone Arduino with ATMEGA328P / Serial working, but serial programming not (only once after buning bootloader) - Arduino Stack Exchange](https://i.stack.imgur.com/87HhA.png)
Standalone Arduino with ATMEGA328P / Serial working, but serial programming not (only once after buning bootloader) - Arduino Stack Exchange
![BLE Development Board for Arduino R3 Micro Interface and BLE T1 CC2540 Bluetooth 4.0 Wireless Module ,Base on ATmega328P|Integrated Circuits| - AliExpress BLE Development Board for Arduino R3 Micro Interface and BLE T1 CC2540 Bluetooth 4.0 Wireless Module ,Base on ATmega328P|Integrated Circuits| - AliExpress](https://ae01.alicdn.com/kf/Haa277f9fc7364911b03098e87d8efae5z/BLE-Development-Board-for-Arduino-R3-Micro-Interface-and-BLE-T1-CC2540-Bluetooth-4-0-Wireless.jpg_Q90.jpg_.webp)
BLE Development Board for Arduino R3 Micro Interface and BLE T1 CC2540 Bluetooth 4.0 Wireless Module ,Base on ATmega328P|Integrated Circuits| - AliExpress
Tools Electronics and Tech. - Arduino Uno is a microcontroller board based on 8-bit ATmega328P microcontroller. Along with ATmega328P, it consists other components such as crystal oscillator, serial communication, voltage regulator, etc.
![Arduino UNO R3 and Atmega328P pin out. Digital pins 11-13 are used for... | Download Scientific Diagram Arduino UNO R3 and Atmega328P pin out. Digital pins 11-13 are used for... | Download Scientific Diagram](https://www.researchgate.net/publication/347276757/figure/fig1/AS:1003542487785477@1616274582233/Arduino-UNO-R3-and-Atmega328P-pin-out-Digital-pins-11-13-are-used-for-the-serial.png)
Arduino UNO R3 and Atmega328P pin out. Digital pins 11-13 are used for... | Download Scientific Diagram
Can't get serial communication working on Atmega328 - Networking, Protocols, and Devices - Arduino Forum
![atmega - Can I use ATmega328 TX/RX pins to drive an R2R network and still use the serial port to program the MCU? - Electrical Engineering Stack Exchange atmega - Can I use ATmega328 TX/RX pins to drive an R2R network and still use the serial port to program the MCU? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/DPXRN.png)
atmega - Can I use ATmega328 TX/RX pins to drive an R2R network and still use the serial port to program the MCU? - Electrical Engineering Stack Exchange
![Usb to serial converter to program atmega328 on breadboard. - Installation & Troubleshooting - Arduino Forum Usb to serial converter to program atmega328 on breadboard. - Installation & Troubleshooting - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/9/7/5/975f543c3db9e4d280789b679462b8f30597417e.jpeg)