Data Transmission; Spp Data Transparent Transmission - Ebyte E104-BT40 User Manual

Dual-mode bluetooth module v 4.2 protocol

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Chengdu Ebyte Electronic Technology Co.,Ltd.

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

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]

4-10

Diagram 4-4 Bluetooth serial APP connection process

E104-BT40 User Manual

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