Hi, Can I use a stepper motor (12V) and use both external power inputs (9V Vin and 12V Servo+-)? I mean is the servo+- power input connected to the motor output?? Thank you.

This is beyond frustrating trying to get help from dfrobot! The brand new Romeo BLE mini is not showing up when connected via usb to the computer nor does it allow the pc to connect via bluetooth. It will connect to my phone and the red light is solid green light blinking. Without any product support whatsoever it's an expensive paperweight and not even a good one at that!!

Hi, I am running 3 x HS-805BB servos off this board, with a 5V 3A power plug going into the servo power, and the board is powered by USB. I want to use the USB BLE-Link for comms to remove the USB cable. Can I splice my 5V 3A power to go into servo and VIN to power the board as well as the servos?

HI , i would like to know if it is possible to program the board with scratch or blockly ?

You can not use PC bluetooth directly, you need to use a BLE dongle https://www.dfrobot.com/pro... to connect to PC, then pair the BLE dongle with Romeo BLE to send and receive the signal, then control the on/off signal.

Yes, you can use analog pins as digital pins, and you don't have to rename them. Check out descriptions on arduino website: https://www.arduino.cc/en/T....

We made some change of the motor drive chip, that's why the input voltage range is different.

Hi
we are now upgrade a new version of Romeo BLE min, the new version will have a new chip and the new one is a smaller Romeo BLE which has all functions like Romeo. You can place your order if you like the new version, and add a comment that you want the new version, we can process your order

What's the noise you meaning when control 6 servos?

Yes Sir, the port is not enabled. Follow the steps of the link and it is not enabled. I have a laptop with Win 7 and another with Win 10, in none. I bought Romeo ble mini. COM is not enabled.
https://www.dfrobot.com/wik...

I have a laptop with Windows 10 and another with windows 7 and in none I can install the board. Please help me. Thank you very much. what I do?

Romeo_m.motorControl(Forward,100,Forward,0); M1 is turn on, but M2 is also turn on
Romeo_m.motorControl(Reverse,100,Forward,0); M1 is turn on, but M2 is also turn on
Romeo_m.motorControl(Reverse,0,Forward,100); M1 is turn off, but M2 is also turn off.
Romeo_m.motorControl(Forward,0,Forward,100); M1 is turn off, but M2 is also turn off.

What happened in the driver?

Any updates when it would be back in stock?

What is maximum current rating on the DC motor outputs and on servo output?

I'm trying to connect this board with snap4arduino via Bluetooth but without any success. With cable, everything's fine, also with hc-06 Bluetooth model there is no issue.
The requirements are straight forward. The bluetooth have to be configured with baud rate 57600 and to be connected with the PC. On the snap4arduino when try to connect you will see the com port related to that Bluetooth.

I have set the baud rate to 57600 with AT command (AT+UARTbaud=57600). If i checked with AT+UARTbaud=? > the result is 57600.
I have set this command with both NL&CR. but I think the only difference between this and No line ending is the format of th AT command, right?

I'm able to connect to the PC using a Trust bluetooth adapter and I can see two com ports 39 and 40 created by the bluetooth adapter. I can see these ports also on snap4arduino, but when I try to connect to it it said access denied to this port no...

There are any special settings that I have to made for this bluetooth 4.0 to communicate via a com port with 57600 baud rate.

I was tried on another laptop that have an incorporated bluetooth 4.0, but here, I'm able to connect the PC with board but not able to see any com port related to this bluetooth. So I'm not sure what is wrong.

This setup is very important for me and based on this I have to decide if I will continue my project with this board or I have to use other boards without bluetooth 4.0. So any help will be appreciated.

Many thanks for support.

If there is no power on servo terminal, it gets powers from VIN also.

Sorry for the late reply.
For the time being, there is no expansion board for this module. As it almost lay out all the available port.

Hi, what's about reinstalling the Arduino driver? It's located in the Arduino IDE folder

I have to admit that this is one of the worst Arduino products I have used to date. I had the hardest time communicating with it via Bluetooth, when I was finally getting somewhere it appears that my bootloader some how got corrupted. Now I don't see any way of fixing the bootloader. The ICSP pins look like they require some tricky soldering work to connect to it, and there is a missing reset pin for which I can't even fix the bootloader with the external pins if I even tried. There is no documentation for this product either. What a waste!

Also there is no light to indicate if the bootloader works.

HI, we haven't try it with stepper motor driving, but since it comes with 2-way motor driver, it should work. I found a tutorial based on L298N, hope it will help you. Anyway, Motor power port could support motor driving. Servo power port is for the huge current for GPIO side