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Q3: If already follow the steps as above showing, still can not identify the AT Command, better to
make the module connect the smart phone APP, using the APP to send "12345" to the module,
using the OSC to monitor the TXD of the module, whether there coming out the wave shape. Send
the data to the module, using the OSC to monitor the RXD of the module, whether there coming
out the wave shape,meanwhile,check the smartphone get the data or not.
Q4：Android Smart Phone why can not use the BLE:
1. Some old android smart phone not support BLE(We suggest to use our Bluetooth dual mode
module)
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