Plus 2 with PCA9685 16 channel PWM Controller (I2C)

Okay, so I've updated my N+2 to 4.2.2.2 and I am transitioning my PWM controls off the on board (since I need 15) to the AdaFruit 16 channel 12 bit PWM controller. (http://www.adafruit.com/products/815). I've got it hooked up as such:

Netduino + 2 SC Pin -> SCL Pin (Pullup off 3.3v with a 2.2k)

Netduino + 2 SD Pin -> SDA Pin (Pullup off 3.3v with a 2.2k)

3.3v -> VCC

GND -> GND

Here is how it is set up:

I am using the 'driver' class from http://forums.netdui...wms/#entry42442

and executing the following:

Adafruit_PWMServoDriver Light1 = new Adafruit_PWMServoDriver();Light1.setPWMFreq(100);Light1.setPWM(4, 0, 200);

I don't have a scope, so I'm sort of flying blind but with the PWM of channel 4 hooked up to a channel that works if I control it directly from the N+2 nothing changes when I set it as displayed, it's at 100%.

I'm a 100% newbie on i2c stuff, BrandonW6's driver doesn't mean too much to me, where can I start troubleshooting?

Thanks!

did you try connecting it to sda and scl makred pins on netduino?

did you try connecting it to sda and scl makred pins on netduino?

Indeed, that is how I have had it set up from the start- the diagram hooked to analog 4 and 5 with no pullups is from AdaFruit's website, showing how they suggest connecting it to a UNO. I posted it as a "Should I connnect it like this instead?!"  Perhaps it'd help if I made my own diagram? I have tried it without the pullups with no further success.

have you made the update to 4.2.2.2 ?

have you made the update to 4.2.2.2 ?

Yes.

updated original post to show how I've attached it.

NooM Helped me break it down and just check to see if my hardware works, and it does appear to be working- I can read / write

Alright, so - the diagram above works fine. 

You can find the driver I ended up using in this thread:http://forums.netdui...y-pwms/?p=48501

But the long and short is things are working well.