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BTW,? have a look at OneOfEleven's nanovna-app program - it takes screenshots,calibrates the device and a lot more. The link is in her github account but you can find the link by searching for nanovna-app in the forum messages.
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On Wednesday, March 24, 2021, 3:28:24 p.m. EDT, Larry Rothman <nlroth@...> wrote:
In DiSlord firmware, the screenshot works if you click on the centre, bottom of the screen. You can add a 32KHz xtal on the PC14-PC15 pins at the bottom edge of the H4 PCB, then set using the time cmd in the console. ? ? On Wednesday, March 24, 2021, 2:40:46 p.m. EDT, Ken Moorman <nu4i@...> wrote: Several months ago, possibly last year even, there was some discussion here about the nanoVNA-H4 as having built onto the boards either a jack that would accept micro-SD cards or at least the circuit pads were present for the installation of said jack if it had not actually been soldered on by the manufacturer.? I also remember that there was discussion about adding a small clock crystal directly across two pins on, I believe, the SMT MCU. This would allow the user to set the clock using a terminal program like Putty.? Firmware was also being written to support these two features, I believe.? I was too busy with other problems on my learning curve for nanoVNA use that I didn't save any of the discussions then.? I have a hardware version 4.2 which has the micro-SD card jack already added and have added a slot to the case for it.? I have upgraded the firmware to Dislord's latest version, v1.0.50, which has the menu item "SD CARD" on the Main Menu. Tapping on that brings up the next menu with "SAVE S1P" and "SAVE S2P". There was also something said, I thought, about saving screenshots on the nanoVNA-H4 to the micro-SD card but I haven't seen a menu item for that yet. I have not tried plugging in a card yet but when I tap on either of the save commands nothing seems to happen and I get no error message.? If anyone has discovered how to use any of these functions including the clock I would really like to learn what you know.? And if all this is yet to be implemented I would like to know that as well.? Being able to save the s1p and s2p files in the field would be a very nice feature, as well as being able to retain screenshots.? I have used my phone to take pictures of the screen but saving them to the card would be great and wouldn't take any effort. Ken, NU4I |
