Hello All, After spending hours trying to solve my issue, I finally (try to) see here if someone has an idea about this :
I have an UNO board and on top I plugged the GEEETECH YUN SHIELD.
The UNO is powered via 12V supply.
I can log on with ssh to the yun ->ok
I configured in boards.txt file the adequate stuffs, so the IDE find wifi board and is able to upload a sketch via wifi on the yun. The sketch is running good. I can play with leds.
So the SPI is working. 8)
Nevertheless, everything using the UART fails.
The jumpers on the YUN is configured on 5V (not 3V), and a jumper on the UNO disable the onboard usb/serial (I checked ...the UNO USB is no more working).
I have checked that when trying to use sketch using bridge() ... the blocking things is bridge.begin() on the UNO (this is documented as a blocking function).
So i concluded this function waits something that never happens on the YUN side.
I am wondering what to do next to troubleshoot this issue. Does anyone have an idea ?
Off course, The YUN is well configured as documented with
ARDUINO BOARD TYPE - "Uno with at mega328" and not something else
OPERATION MODE - Arduino Bridge