I am new to this. I basically need to replace a cable that sends a constant value at a time. Can I get help choosing a bluetooth master component that does nothing more than transmits a signal to exactly two bluetooth slaves. All the signal needs to communicate is that the signal is either on or off, and when on the signal only needs to tell the slave a single value at a time. Meaning it will always send a value of say 3 until the user changes the value. The value needs to have a certain range I'm not sure about at this time. The only time the value changes is when the user changes it. I don't anticipate the user would change the value like when a knob changes the volume of a speaker. There would be an unpredictable amount of time between each time the user changes the value sent by the master bluetooth, except that the user won't change the value up and down in a continuous fashion. The master only transmits, except when pairing of course, it needs to use as little power as possible, use a rechargeable battery, and allow an audio cable to connect to it using 3.5mm jack. This project takes an analog signal through the audio cable. Again the signal coming from the audio cable will always be a constant until specifically changed by the user. The user can only set a constant strength at a time of the signal coming through the audio cable to the bluetooth component.
The two slaves needs only to receive from the master, except during pairing. The slave translates the signal it receives from the master as a single value. Again the slave needs a rechargeable battery, and must use minimal power.The slave sends a signal through an RCA jack - a male RCA in order to plug into an RCA female jack. The RCA female jack connects to a 3 volt vibrating unit, like what iPhones use. Basically I need to send a message from the master to the slave saying how strong the vibration of the vibrating unit should vibrate at a time. So the rechargeable battery would supply power to the vibrating unit, and the bluetooth slave unit.
I forgot to say I really need it as small as possible. I looked through some of your components on spark fun. It looks like the nano is the smallest. Could l use smaller pieces and put together my own Bluetooth component tailored to my needs.
I looked up one of the components or boards you mentioned. It says it uses Wi-Fi. I can’t find anything about that that says Bluetooth. Will it be a waste of resources to use wifi instead of Bluetooth?
I don't know what to use, hopefully smaller than a board. I'm totally new to this. I'm looking for whichever fits the criteria of being low energy and small in size, so yes BLE, as well as having a chargeable battery and able to connect to an audio cable through a 3.5mm, or RCA jack. I need a slave that connects to a 3.5mm jack, and two slaves, each connecting to an RCA jack. The slaves will also need to provide power to the RCA jack in order to make a 3 volt vibration component vibrate.
The signal from master to slave only sends a signal indicating on or off, and if on, a constant value that doesn't change but can be set by the user. Basically the signal tells the vibrating unit how hard to vibrate according to the user's settings.
The slave needs to be small enough for it and the vibrating unit attached to it and covered in a casing to fit in one hand. Basically, I need one vibrating piece for each hand of the user. The case for the vibrating unit will be ergonomic or cosmetically pleasing, but that does not call for a solution for Ardunio, I believe.
That answer turned out very long. The short answer is yes, BLE, and I have no idea what Ardunio board or even a board at all or another solution that requires putting together a number of components in order to do what I need that doesn't take all what a board would provide.
I want to make one of these units in the picture at TheraTapper™ - Tactile Bilateral Stimulation use bluetooth or anything more practical to replace the cables that unit uses. That unit uses more than what RS232 can do because the signal must be able to be modulated. The signal is not modulated by anything the unit does, but is modulated by a setting - the knob in the middle. The user won't be turning the know up and down constantly. He/she will use the know to set how strongly the vibrating unit vibrates in the user's hands.
I know nothing of BLE, but a search for "bluetooth BLE one master multiple slaves" yields a lot of hits. Maybe something there. Sorry, that is the best that I can do.