银尔达 YINERDA 工业级4G DTU RS485+UART接☐ 支持二次开发 YED-D724X UIN ceeeoooocceeeeeee D RTI uat Air724 uG www.openluat.com USB BOOT 丰 Air724UG-NA N D 银尔达IoT IME:862991521784592 SN:05H03160060800195 00●00●●0●●9900900 SPK-SPK MIC-MIC+