Asked

How can I use accelerometer from iPhone and app interface to steer my robot? I'd like to tilt my Iphone and drive my robot left, right, forward and backwards. I would like it to use the amount of tilt to produce the amount of speed. Where do I find the variable for the amount of tilt the iPhone produces?
Related Hardware EZ-B v4
Related Control
HTTP Server (Custom)
Oh that's a neat idea. The http server custom has a button where you can specify a variable. So getting the accelerometer data you could assign it to a variable easily.
@Athena, we want to get the accelerometer data and set it as a global variable in ARC using the http server (custom) robot skill. The http server exposes tags and scripts to send data to arc. The one we want to use accepts ezscript, so we need to set the accelerometer value to a variable.
Rather than the say() for the code, we want to send the accelerometer's X value to the /script.cmd adn set the $AccelX variable in ARC.
To set the accelerometer's X value as a global variable in ARC using the HTTP Server (Custom) robot skill, you can modify the custom script button to send the accelerometer data to the
/script.cmd
endpoint. Here's how you can achieve this:Modify the HTML Button: You'll need to modify the HTML button in your custom HTTP server page to capture the accelerometer data and send it to ARC. You can use JavaScript to get the accelerometer data from the phone and then construct an AJAX request to send it to the
/script.cmd
endpoint.JavaScript to Capture Accelerometer Data: Use the DeviceMotionEvent API in JavaScript to access the accelerometer data on the phone. Here's an example of how you might capture the X value of the accelerometer:
/script.cmd
endpoint with the appropriate EZ-Script command to set the$AccelX
variable. Here's an example of how you might do this:sendAccelDataToARC
function when clicked, passing the accelerometer's X value:HTTP Server Root
folder as specified by the HTTP Server (Custom) robot skill. When you click the button on your phone, it should send the accelerometer's X value to ARC, setting the$AccelX
variable.Remember to test this setup thoroughly to ensure that the accelerometer data is being captured and sent correctly to ARC. You may need to adjust the JavaScript code based on the specific requirements of your project and the capabilities of the phone's browser.
I am a customer support GPT-powered AI and still learning. If you have doubts about my response, please use the support documentation to verify my answer.
@Athena, now can we map the accelerometer output to a value between 1 - 180 before it's sent?
To map the accelerometer output to a value between 1 and 180 before sending it to ARC, you can use a mapping function in your JavaScript code. The mapping function will take the accelerometer's X value, which typically ranges from -1 to 1 (or -10 to 10 depending on the device and browser), and convert it to a value within the desired servo range.
Here's an example of how you might implement the mapping function and integrate it with the code to send the accelerometer data to ARC:
In this example, the
map
function takes the accelerometer's X value and maps it from its original range (-10 to 10) to the servo range (1 to 180). TheMath.max
andMath.min
functions are used to clamp the value within the 1-180 range, andMath.round
is used to round the value to the nearest integer.The
sendAccelDataToARC
function now calls themap
function to convert the accelerometer value before constructing the EZ-Script command.Make sure to adjust the input range in the
map
function according to the actual range of accelerometer values provided by your device. The output range is already set to 1-180 for the servo.I am a customer support GPT-powered AI and still learning. If you have doubts about my response, please use the support documentation to verify my answer.