DFRobot TEL0120 Manual - Page 18
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Print PageFAQ
Q: How to deal with the situation cannot download?
A: There are many reasons for this problem:
1. Check basics, such as power supply, board type and COM port.
2. Bluetooth will occupy the serial port which will hamper uploading. Please disconnect the
current Bluetooth connection, and try again.
3. The device serial port may be occupied. Please disconnect all peripherals then recompile
and download again.
4. Arduino IDE may crashed. Please disconnect all Bluetooth (include smartphone), close all
Arduino IDE software, pull USB line, reopen and test.
5. Bootloader in the FireBeetle 328P may get lost. Please try re-uploading Bootloader of
ATmaga328p.
6. BLE 4.1 firmware may wrong. Please re-upload firmware and check the former chapter for
reference.
Q: How to choose board when the device manager shows Arduino UNO COM x after connected to
PC?
A: The COM name in default is Arduino UNO. Please choose the board according to
bootloader, e.g. choose Arduino Pro Mini 3.3V@8MHz for FireBeetle BLE4.1.
Q: How to deal with the Bluetooth ID number varies with connection?
A: The current Bluetooth ID number is defined with the connection order, ID1, ID2, ID3, DI4 in
order and unchangeable. Please connect the host (the central device ID0) in turn.
Q: Why the Bluetooth data been received is gibberish in the baud rate 115200?
A: The bootloader that FireBeetle BLE4.1 uses is 3.3V Pro Mini of 8MHz oscillator. The
Arduino Pro Mini 3.3V@8MHz may runs wrong with high baud rate. The lower baud rate is
recommend, e.g. 9600bps
Q Does BLE4.1 supports HID, ibeacon and tree network?
A: The functions HID, ibeacon and tree network are under development.
For any questions, advice or cool ideas to share, please visit the
https://www.dfrobot.com/wiki/index.php/DFRobot_BLE4.1_Module_SKU:_TEL0120#More_Documents 11‐9‐17
DFRobot
Forum.