3 replies to this topic

[Gaines]

I wired up my Netduino Plus to a SHT15 breakout board using the Sparksfun diagram and tried Elze Kool's SHT1x classes. When I executed the code I kept getting an error when performing the SoftReset (returned true). Below is a photo of the breadboard and I've attached the solution.


Tonight was the Nashville .NET User Group lab and we happened to be tinkering with .NET MF so I brought it along to see if anyone could help. While we were tinkering we tried switching from the COM port to SCL/SDA and disabling ResistorMode. It gave the following results.
Temperature Celcius: -39.700000762939453
Temperature in percent: -2.6937998913154004

Obviously I'm just shooting in the dark here. I'm hoping there's something simple I've overlooked. If not, how can I go about troubleshooting this?

Thanks,
Gaines

Attached Files

•  DefaultSolution.zip   8.66KB   26 downloads
•  TweakedSolution.zip   8.67KB   22 downloads

[Arron Chapman]

I wired up my Netduino Plus to a SHT15 breakout board using the Sparksfun diagram and tried Elze Kool's SHT1x classes. When I executed the code I kept getting an error when performing the SoftReset (returned false). Below is a photo of the breadboard and I've attached the solution.

Obviously I'm just shooting in the dark here. I'm hoping there's something simple I've overlooked. If not, how can I go about troubleshooting this?

Thanks,
Gaines

As we talked about in chat, I think you have 2 problems first, you should switch to 3.3V for the power supply. The datasheet states that a logic High (1) must be 0.8*Vdd, which when powered with 5V is 4V. The Netduino however only provides 3.3V for logic High, if you switch to 3.3V supply then you should be fine. Second was the required 11ms between powering the device up and writing to it, so just add a Thread.Sleep(11) before you init the device.

[Gaines]

I tried changing it to 3.3v, adding a 1000ms delay after the constructor and changing the pin declarations to GPIO_Pin0 and GPIO_Pin1. No change.

[andrea.pnt81]

I tried changing it to 3.3v, adding a 1000ms delay after the constructor and changing the pin declarations to GPIO_Pin0 and GPIO_Pin1. No change.

I'm facing the same problem, using Pins.GPIO_PIN_D9 (Data) and D10 (Clock) ; Have you already discovered the SoftReset() error cause ?
Thanks..