[PD] sr04 with arduino standardfirmata?

[Alexandros]

The SR04 works by sending a trigger signal and waiting for the echo 
signal. It then calculates the time between the two signals and 
translates this to distance. All this happens in the pulseIn() function 
used with this sensor.

In order to make it work with Firmata you must send a signal out the 
trigger pin and as soon as you receive a signal from the echo pin you 
must do the math to make the conversion, meaning, you must translate the 
workings of pulseIn() to a Pd patch. Connecting a pin of the sensor to 
an analog pin simply doesn't make sense.

You can instead use the code that is provided (don't know where, but 
there are some examples for this sensor, right?), and on the Pd side use 
[serial_print], an abstraction that works with Arduino's Serial.print() 
function. You can get it here https://github.com/alexdrymonitis/Arduino_Pd

Make sure you read both the help patch and the Arduino sketch in order 
to make the appropriate changes to your code.


On 06/02/2018 06:16 πμ, ray Y wrote:
>
> is there a work around for this?
>
> the sr-04 is a way cooler sensor than the ones supported by
>
> standardfirmata!
>
>
> why is it not supported?
>
>
> there most be a hack to make the emiter and receiver
>
> functions act as one with the signal going into the analog
>
> inputs of the arduino. as a standard sensor?
>
>
> wow, i google and there is almost nothing out there about this
>
> i'm a bit tired of trying to do this
>
>
> please help
>
>
> thanks
>
> r.y
>
>
>
>
>
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