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if (connect(sock,(struct sockaddr*)&server_addr,sizeof(struct sockaddr))==-1) { rt_kprintf("Connect fail!\n"); closesocket(sock); rt_free(tcp_recv_data); return; }
EEE Flash Connector pinout
Mini PCIE pinout used in most LTE modules
Gigabit Ethernet pinout of the MT7621
DDR3 interface to MT7621
USB interface for MT7621
NFC interface to MT762X
Isolating signal (1500V)
Programmable gain control for alanog signal for signal conditioning
Protection before signal conditioning and analogue signal
Communication RS485 <-> UART
Physical layer based on LAN8720
Power Supply for 5V and 3.3V to power MCU
