HC-12 : 433MHz 대역폭에서 지상 1km 정도 통신가능하다는 무선시리얼 모듈

몇 가지 찾아본 것과 제품설명서
https://www.elecrow.com/download/HC-12.pdf

사진은 기판이고, 여기에 스프링같이 생긴 안테나가 있음.

https://www.devicemart.co.kr/goods/view?no=1361686 

https://www.banggood.com/ko/HC-12-433-SI4463-Wireless-Serial-Module-Remote-1000M-With-Antenna-p-973522.html?cur_warehouse=CN 

Product Application
 Wireless sensor
 Community building security
 Robot wireless control
 Industrial remote control and telemetering
 Automatic data acquisition
 Container information management
 POS system
 Wireless acquisition of gas meter data
 Vehicle keyless entry system
 PC wireless networking ……
V1.18
Document: 2012/10
Product Features
 Long-distance wireless transmission (1,000m in open space/baud rate 5,000bps in
the air)
 Working frequency range (433.4-473.0MHz, up to 100 communication channels)
 Maximum 100mW (20dBm) transmitting power (8 gears of power can be set)
 Three working modes, adapting to different application situations
 Built-in MCU, performing communication with external device through serial
port
 The number of bytes transmitted unlimited to one time
 Update software version through serial port


사용기
https://time2love.tistory.com/5
https://bbangpan.tistory.com/12
https://kocoafab.cc/fboard/view/1552
https://ko.electronics-council.com/understanding-implementing-hc-12-wireless-transceiver-module-37530
http://blog.naver.com/PostView.nhn?blogId=eros1092&logNo=221438399272&parentCategoryNo=&categoryNo=123&viewDate=&isShowPopularPosts=true&from=search

128개 채널을 사용하여 주파수 변경 가능. 단, 433.4~473.0 MHz 라는 범위는 고정.