Teseo-liv3f (Astra1b) can't find any sattelites

[Gregor14]

Hi to everybody,

I have a annoying problem with Teseo-liv3f (on Astra1B). It can not find any sattelites. What I have:

1. Chip is build in dev kit from STM Astra1B, so there is no problem with layout, wrong antenna, etc. 

2. I'm using as reference hex files from example project provided by STM: "CustomUC"

3. Kit is placed under sky, so it can see sattelites.

4. I have 3 pcs. of such kit, both can't see sattlites

5. On all devices, I program (at the beginning) my compilation of my firmware. When I realise that it can't see sattelites, I reprogram then flash by hex delivered by STM (CustomUC). Still can't see sattlites (I'm using on console command !gnssreport-on). Maybe during programming my version of firmware, I damaged some configuration bytes??

6. I though that maybe amplifier on gps antenna is off (ANToff pin13), but there is 3.3V, so seems to be OK.

7. Now, I detach on one device TX and RX of Teseo-liv3F, and I connect them (through serial / usb converter) to computer. I'm using now Teseo-Suite. I see logs, I try to reconfigure low power mode, used contellations, etc. No luck. Teseo is reconfigured, but still no sattelites.

8. I have also other gps module (Ublox Neo-7m). It works, even inside room, so this is not problem of "noisy environment".

9. I fulfill all reccomendation from this thread: STEVAL-ASTRA1B - Teseo-LIV3F GNSS Not working - STMicroelectronics Community

10. I read in Teseo-Suite Pro all info about version of Teseo. Here it is:

OS20LIB_4.3.0_ARM

GPSAPP_2.4.0.2_ARM

BINIMG_4.6.8.2_ARM

SWCFG_82045325

WAASLIB_2.20.0_ARM

STAGPSLIB_6.0.0_ARM

STA8090_822bc043

GNSSLIB_8.4.10.16.3_ARM

Maybe sombody have any clue, what I do wrong? Broken 3 devices, I doubt it. Rather I set wrong some jumpers or during programming I made some mistake.

Any clues are welcome. 

Thank you in advance,

Gregor

[GalaxyQuest]

Hi,

Factory offered to have the board you have shipped back for Failure Analysis. Please let me know if you are interested. They can provide a replacement for you. 

You mentioned you have 3 pcs of such kit. If so, you can return one of those kits that are not modified so that they can analyze the issue. We should be able to provide a replacement board.

My apologies for the delayed reply. I did not realize you had replied.

[Gregor14]

Thank you for your offer, but I can't take it. All my Astra's at this moment are modified and/or repaired. In all of them I cut power and signals from Teseo (SB100, SB102 and  SB103) and I connect as external devices Quectel L76K. Now it's working at customer as very early prototype.

BTW: Two devices I was forced to repair, because bump on enclosure that should press side switch (SW501) is so narrow, that even small misalignment at position of PCB can ripoff transistor Q504 by this bump.