I'm currently trying to get RIOT to fly on the SODAQ SARA SFF board.
Unfortunately I'm struggling a little bit with the startup sequence of the
U-Blox module. According to the documentation here:
http://doc.riot-os.org/sodaq-sara-sff_2include_2board_8h.html and the Arduino
samples provided by SODAQ I assumed that I would need to call SARA_ENABLE_ON
and SARA_TX_ENABLE_ON, followed by toggling SARA_R4XX_PWR_ON_PIN, but I still
fail to read the firmware via an AT command. Anyone with experience with the
SODAQ boards and the SARA U-Blox module?
I started a driver for the Ublox device on this branch [1]. It is
limited but it is working on the SODAQ SARA AFF board. I don't know if
the pins change on the SFF version of the board, but you can give it a
try. Hope that helps.