Here is a list of all functions with links to the files they belong to:

• callback_light() : coapserver.ino, esp32.ino, esp8266.ino
• callback_response() : coapserver.ino, coaptest.ino, esp32.ino, esp8266.ino
• dev_ip() : coapserver.ino, coaptest.ino
• endpoint_subscribe() : coapserver-with-observe.ino
• ip() : coapserver-with-observe.ino
• loop() : coapserver-with-observe.ino, coapserver.ino, coaptest.ino, esp32.ino, esp8266.ino
• send_notification() : coapserver-with-observe.ino
• setup() : coapserver-with-observe.ino, coapserver.ino, coaptest.ino, esp32.ino, esp8266.ino