TTGO not working

[michalaniol]

Hello
I tried uploading the binary dozens of times but it does not seem to work. The screen stays dark. On the smartphone I can see (and pair up with) a device called "MySondyGO-..." but in the app, the device cannot connect. I tried some other test binaries and they seem to work fine on my TTGO. I got the device from https://www.banggood.com/2Pcs-LILYGO-TT ... &ID=510804

Do you have any idea what can be the issue?

Kind Regards

[Thierry50]

Hi, normal you did not get the right model you got the V1, which is not really TOP, and it seems that you got an 868 or 915 Mhz model, which is normal that it does not work,

if not, if it is really a 433mhz, you have to change the parameters in the ttgo configuration, on SDA put 4 and on SCL put 15 and you should have the screen

it was better to take this version V.2.16 en 433 Mhz https://fr.aliexpress.com/item/33045828 ... 6c378YN7eI

[michalaniol]

Hi, it is indeed 868 MHz. I heard the board HW can be adjusted for 433 MHz. Still I don't quite understand why because of the other LoRa frequency, BT would not connect or OLED not work.

[michalaniol]

Here is what I meant (https://github-wiki-see.page/m/dl9rdz/r ... ted-boards).
"
The 868/915 MHz version contains the SX1276 receiver chip. The chip supports both 433 MHZ and 868/915 MHz, but using different input pins. The board connects the antenna to the 868/915 MHZ input pin, the 433 MHz pin is unconnected. Theoretically the 868/915 MHZ version can be modified to work as 403 MHz receiver by directly connecting the antenna to the right pin of the chip
"
Does anyone know what adjustments need to be made?

[Thierry50]

OK as you want

[michalaniol]

Hello again, I just got a new version of TTGO, with the right frequency. The FW seems to upload flawlessly, the device boots up and I can pair it up on my smartphone. Still one problem persists - the app can't connect to TTGO. I found another topic on that issue but the solution - rebooting TTGO doesn't help for me.

[Thierry50]

Bonjour, voici la version qu'il vous faut

https://m.fr.aliexpress.com/item/100500 ... 3062523617&

[buttim]

In case you did not solve your problem in the meantime. It probably won't work either, but you could try my app to see if you can connect to the TTGO:
https://play.google.com/apps/testing/eu ... ovalasonda

[Thierry50]

for buttim, your software version has a small problem with the speed of movement of the probe, it displays km/h instead of m/s, this afternoon I followed a probe which on your software was at 50km/h , so what was actually at 180 km/h - (50x3.6= 180)
put m/s instead of km/h

[buttim]

thanks for reporting, Thierry. Which kind of sonde? M10?