Description
The BlueDuino R2 wires CC2540 UART port to Serial1 directly. So we can upgrade the firmware easily.
| CC2540 | BlueDuino Rev2 |
| RX | TXO (Serial1) |
| TX | RXI (Serial1) |
| GND | GND |
Hardware requirements
- A USB to UART converter such as FTDI usb module. Our CP2102 USB to UART converter is good and cheaper option.
- Some female to female dupont jumper lines
Software requirements
Getting Start
NOTE: You must upload new firmware to the module if it goes to upgrade mode. Otherwise the module will stay at upgrade mode and was bricked.
- Wire the USB to UART converter and BlueDuino
| USB to UART converter | BlueDuino Rev2 |
| RX | RXI (Serial1) |
| TX | TXO (Serial1) |
| GND | GND |
- Plug the BlueDuino to PC
- Wire USB to UART converter to PC
- Open telnet terminal, you will get "OK" when you type "AT". So type "AT+SBLUP", you will get "OK+SBLUP". It's mean the cc254x module is ready for upgrade. It can't accept any other AT command now.
- Upload an empty sketch to BlueDuino.
void setup(){} void loop() {} - Open the SerialBootTool, Choose the serial port and baud rate 115200, then choose the firmware
- Click "Load Image"
Wait a while. You will see the words "Download completed successfully"
You've done!
Firmware
Troubleshooting
- Please retry some times if you upgrade fails
- Please disconnect the uart connection when it upgrading