路由器外壳图片，天线数目为 1 2 4 6 8

￥4.9
Wi-Fi_LoRa_1_Antenna_Box
https://detail.1688.com/offer/531275088624.html?spm=a2615.7691456.autotrace-offerGeneral.13.8af255c5OecCpV

￥4.9
Wi-Fi_LoRa_2_Antenna_Box
https://detail.1688.com/offer/826348376.html?spm=a2615.7691456.autotrace-offerGeneral.4.6de755c5Vf8z6r

￥4.9
SX1278_4_Channel_Box
https://detail.1688.com/offer/559923177365.html?spm=a2615.7691456.autotrace-offerGeneral.4.30d178d1iTeWon

二手路由器
https://item.taobao.com/item.htm?spm=a230r.1.14.92.73195ab9BRYwDc&id=613475920176&ns=1&abbucket=14#detail