Hello all,
I am quite new to Arduino. I have only played around with a few LED projects, but I am interested in making a biped robot. Nothing too complicated, just a couple of servos and brackets. I found a few tutorials on how to control servos with an accelerometer, but I would like to take my project one step further, and would like to control the robot with an accelerometer wirelessly. Can anyone help me out with which type of transmitter/receiver I would need, or give a link to a tutorial? Some example code would also be appreciated to help me get started. I would like to keep the cost as low as possible and try to avoid needing to buy another arduino, like most sites suggested. (By the way I am using an Arduino Uno if that matters).
Can anyone help me out with which type of transmitter/receiver I would need
How much data? What range? How much data loss can you stand? How much of the data transmission/acknowledgement/retransmission code are you willing (and able) to write vs. what should be designed into the hardware? How much are you willing to pay?
All the data I would need was to know the position of the accelerometer. (If it's tilted forward I want the robot to move forward, tiled back the robot moves backward). This is an indoor project so the max range I would need is about 20 feet. I probably won't be able to write most of it on my own, but I am willing to spend a few hours learning. What do you mean by designed into the hardware? I would spend up to $50, cheaper the better.
I hope at least some of this helps. I apologize if anything is too vague or makes things more confusing I am still new to this stuff.
Well for starters, you're going to need two arduinos of your choice. You will also need a motor shield if you plan to use DC motors, or a small board that can regulate the input voltage and supply 6 volts to power your servos. Since this will be indoors, you can use either IR, a cheap RF pair, or even Bluetooth. Each have their advantages and disadvantages, but whichever one you choose to use, will also depend on your other parts.
XBees have the data transmission/acknowledgement/retransmit stuff all built in. All you need to do is tell the XBee to send some data, and you can be reasonably certain that it will get through, if at all possible.
The cheap 433 MHz transmitters do not. You would be responsible for making sure that the data got through.
All the data I would need was to know the position of the accelerometer.
You do not get position, or orientation, information from an accelerometer. You get acceleration - the rate of change of velocity (which includes speed and direction). You need to integrate that over time to get orientation or position information.
The amount of data is expressed in bytes/second or bytes/month or bytes/year. The accelerometer typically returns 3 ints each time it is asked for data. The more accurately you want to track the position or orientation of the accelerometer, the more frequently you need to ask it for data.
How much processing you do on the Arduino determines how often you need to send data, and how much you have to send.
The type of data (the only thing you described) is only minimally relevant.
I apologize if anything is too vague or makes things more confusing I am still new to this stuff.
I'm not, so that's why I'm asking you all these questions. The only thing you would need to apologize for is failing to answer the questions. You do not need to apologize for failing to anticipate the questions.