<p><span style="color: #404040; font-family: 굴림;">Change ATMEGA2560 Bootloader to run at 8Mhz&nbsp;</span><br style="color: #404040; font-family: 굴림;" /><br style="color: #404040; font-family: 굴림;" /><a href="https://github.com/MCUdude/MegaCore#how-to-install" target="_new" style="text-decoration-line: none; color: #3a4e40; font-family: 굴림;">https://github.com/MCUdude/MegaCore#how-to-install</a><span style="color: #404040; font-family: 굴림;">&nbsp;</span><br style="color: #404040; font-family: 굴림;" /><span style="color: #404040; font-family: 굴림;">* install url&nbsp;</span><br style="color: #404040; font-family: 굴림;" /><a href="https://mcudude.github.io/MegaCore/package_MCUdude_MegaCore_index.json" target="_new" style="text-decoration-line: none; color: #3a4e40; font-family: 굴림;">https://mcudude.github.io/MegaCore/package_MCUdude_MegaCore_index.json</a><span style="color: #404040; font-family: 굴림;">&nbsp;</span><br style="color: #404040; font-family: 굴림;" /><span style="color: #404040; font-family: 굴림;">(MegaCore)&nbsp;</span><br style="color: #404040; font-family: 굴림;" /><span style="color: #404040; font-family: 굴림;">------------------------------------------------&nbsp;</span><br style="color: #404040; font-family: 굴림;" /><span style="color: #404040; font-family: 굴림;">*참고 esp8266 arduino ide install url&nbsp;</span><br style="color: #404040; font-family: 굴림;" /><a href="http://arduino.esp8266.com/stable/package_esp8266com_index.json" target="_new" style="text-decoration-line: none; color: #3a4e40; font-family: 굴림;">http://arduino.esp8266.com/stable/package_esp8266com_index.json</a></p>