Hardware connection is very simple . Your device must send data at any TX pin as UART standard at any baudrate (OSD will detect baudrate as described here a. Communication protocol simple ) We must simply made connection from TX pin of Your Device to RX pin of OSD . GND (ground) must be also connected - elsewhere connection will not work . If Your Device and OSD is supplayed from one battery so already have common GND . Samples on pictures :   |
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