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Katharina Kohls kkohls at cs.ru.nlHi Harald, On 5/28/21 11:15 AM, Harald Welte wrote: > Hi Katharina, > > thanks for your follow-up. > > Can you please share which phone / modem models you have reproduced this with? I am testing with a OnePlus 6T with a Qualcomm SDM845 Snapdragon 845 > > Maybe I can find the same in my collection. > > I will try to run cardem on simtrace on a variety of different phones here and > see which ones work or don't work. > > On Wed, May 26, 2021 at 03:03:38PM +0200, Katharina Kohls wrote: >> BTW while debugging this I realized that the pin layout might be documented >> in the wrong order: The wiki says TX is on 4 (pin 1 = GND, pin 4 = TX, pin 5 >> = RX), however, for me it only worked when hooking up pin 5 with the RX of >> my UART to USB. Is that a typo? > I've always using the 2.5mm stereo jack, as those are used in a lot of Osmocom projects > starting with OsmocomBB more than a decade ago. > > tHe 5-pin UART header was designed to match the FTDI USB-UART cable pin-out. > > The schematics are available, they should definitely be the definitive source to > answer those kind of questions. > > It states: > 1 GND > 2 CTS > 3 VCC > 4 DRXD (SAM3) = TXD of your UART cable > 5 DRXD (SAM3) = RXD of your UART > 6 CTS > > Maybe the wiki could be further clarified? I think this already is a good explanation: The Wiki reads like pin 5 *is* the RX of the simtrace, but looking at the documentation above it *should be connected to* the RX of the UART adapter. I can clarify that in the Wiki. Best, Katharina