Chengdu Ebyte Electronic Technology Co.,Ltd.
E104-BT40 User Manual
Copyright ©2012–2019
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Chengdu Ebyte Electronic Technology Co.,Ltd.
4-10
Refer to the instruction diagram in section 6.4 for the returned message format. Some instruction may display
several 0x00, which can be ignored.
When the message returned by an Apple user is too long, such as querying the Bluetooth name, it may only display
22 bytes depending on the APP. In this case, please limit the set value to a reasonable length.
4.3 Data transmission
Module powered on, classic Bluetooth and BLE are both discoverable. Please refer to section 5.2 for data transmission
precautions.
Test Conditions:
Use mobile phone as master and module as slave
Serial port tool: SSCOM or AccessPort
Other parameters are default configuration
4.3.1 SPP Data transparent transmission
1. Power on the module and enable serial printing (AT + LOGMSG = 1);
2. Open the Bluetooth serial assistant and search for the Bluetooth name: CDEBYTE_SPP, connect, serial print STA:
connect: [mac]
Diagram 4-4 Bluetooth serial APP connection process
