I am using the YUN with an R3 Mega and I need to know which of the header pins are ACTUALLY being used by the Yun and which are only feed through pins. None of the available schematics seem to show that.
Sorry for the noob question but that's what I am.
Do you have a Dragino shield that is compatible with the Yun ?
The shield uses pin 0 and 1 (RX and TX) to communicate with the shield. The library that takes care of that is the "Bridge".
I suggest to use a Arduino Leonardo with that shield. It is already hard enough, and the Arduino Mega makes it a lot harder, since the communication with the computer via usb-serial can not be used.
Even Worse: All I have is the R3 Mega and the Dragino Yun ... I can't switch to a different Arduino ... and so now I don't know how to communicate either if I can't use USB - #&%!!!
The problem is that I need to use ALL the PWM pins and most of the Digitals ... I wanted to know if the Yun would use any of them exclusively and if so, which ones.
The real problem is that Dragino doesn't provide much in the way of specs.
Only pin 0 and 1 are used by the Dragino shield.
templarknight:
The real problem is that Dragino doesn't provide much in the way of specs.
Really? I always thought their wiki page gave quite a lot of useful information, more than most clone board or shield manufacturers give.
For example, this section of that page clearly highlights the three sets of connector pins that are used by the shield (power, serial, and SPI.) they also have schematics that show the same information.
Furthermore, there is a section about how to connect it to various boards, and how the USB interface must often be disabled. This section has the details for the Mega.
I've not used the shield, and can only repeat the information on their wiki, but it does seem to me to be a very good source of information.