I am planning to create my own custom dock. Instead of CP2102 USB to serial converter, I am planning to user CH340G which is easy to solder. For power supply, I am planning to user AMS1117 since I assume that Omega2 does not require more than 300mA. I notice that in the schematic, the voltage divider is used between PC_TXD and RXD. Is it to reduce the 5V to 3.3V? I am planning to use CH340G with 3.3V power supply. Something like this. If do so, should I use the voltage divider network? I assume that I don't have to use. Will post the schematic for the review once I complete.
@Scott-W-Wood I can only reply in connection with the original Omega and original Arduino Dock - I have not yet received my Omega2 and new Arduino Dock R2 - there is no documentation I can find on the latest versions that would allow me to respond definitively on them, though the photos shown on https://www.indiegogo.com/projects/omega2-5-linux-computer-with-wi-fi-made-for-iot#/ for the Arduino Dock R2 show that there are some differences and I don't know how significant these differences are.
@Benjamin-Rau I have just had a play with my Omega and pins 13 and 14 when set as input both operate equally and as expected.
Unless there is a problem with my Omega, there are a few things you could check (forgive me if these are obvious to you or you have already done them :-)):
Are you sure that the circuitry is the same for 13 and 14?
Is the code used to access each of 13 and 14 the same?
Is there anything else that is using one pin but not the other?
If you are using mechanical switches to control the pins, do you have a suitable pull-up/pull-down resistor to pull the pins to the appropriate state when the switch is open?
If you are using mechanical switches, do you have suitable de-bounce circuitry to account for noise? A capacitor in parallel with the switch (along with the use of pull-up/pull-down resistors) should handle this
Hi @Brett-Shipes, I'm very sorry about wasting your time. It is our fault for failing to ensure a quality in our manufacturing process. Would you please just try turning the switch with a pin one more time as shown below. If that does not work we will give you a full refund.
The red arrow points to the location where the switch has broken off. What you should try to do is to use the tip of the needle to push it to the right to the ON position. Another thing that I have noticed is that your Omega isn't fully plugged into the dock. So it could be that you have already turned the switch to the ON position, but as a result of the improper connection between the Omega and the Dock, it wasn't able to turn on. So please push the Omega all the way into the Dock before trying to turn the switch with a pin.
Thank you for your patience in dealing with us, and I apologize again for wasting your time.