Ebyte E104-BT5032A/B User Manual page 49

Chengdu Ebyte Electronic Technology Co., Ltd E104-BT5032A User Manual
7. Data "0123456789"(ASCII) is sent from the master to the slave，the master receives "00 30 31 32 33 34 35 36 37 38 39"
（HEX），the first byte received by the master indicates where the data is sent from. Please refer to the figure below.
Format transmission-data from slave to master
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