Teseo-LIV3F, No GPS coordinate

AAl S.1 · ‎2020-07-13

I made a PCB using Teseo-LIV3F as stand alone, tried to connect TX and RX of the module to Arduino TX and RX using I TinyGps++ library, but I couldn't get any response from the module. I tried to connect the module to software and hardware serial of the Arduino and couldn't also get any response. When I connect the module to USB to TTL I could get response. I am using an active antenna. I have attached the schematic which I am using. Hope to get some help to solve my problem.

Best regards

Francesco Virlinzi · ‎2020-07-16

Hi

Your schematic make sense

You are using tps22093 to provide power to the antenna... voltage comes from VCCRF (correct) and ANT_OFF to enable/disable the switch. This parts can not impact LIV working.... at least (in Over current) it could turnoff the antenna no more than that.

I don't understand where VCC power comes from. I see VIN is the same for LIV and TPS781... but who is providing VIN?

View solution in original post

Francesco Virlinzi · ‎2020-07-13

Hi

Do you see the PPS pulsing?

Is LIV3F out-of-Reset (Reset pins has to be high to guarantee LIV running)

Regards

Francesco

AAl S.1 · ‎2020-07-13

Hi, I have no pin out for PPS and Reset pins to the Arduino. I don't understand why when i connect the TX,RX OF Teseo to USB to TTL I could see that the module responses. The pins PPS and Reset in my schematic that i share with you are have no pinout to th MCU.

AAl S.1 · ‎2020-07-13

I just can see NEMA information when I connect USB to TTL

Francesco Virlinzi · ‎2020-07-13

Which values do you have on:

VCC/VCC_IO?
VBAT?

AAl S.1 · ‎2020-07-13

3.3v

AAl S.1 · ‎2020-07-13

Is the schematic correct? Is there any need to connect PPS and rest to the MCU?

Tesla DeLorean · ‎2020-07-13

Perhaps you have the RX/TX sense backward on the Arduino, or the baud rate is wrong.

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Francesco Virlinzi · ‎2020-07-14

Schematic seems correct

PPS and Reset pins can stay not-connected (LIV has internal resistor to guarantee correct value)

Voltage 3.3 is OK

It has to be running

Just for testing could you add a LED on the PPS? just to understand if LIV is running.

AAl S.1 · ‎2020-07-15

Thanks for help, I will try that. I also measure the TPS out pin and it was 1.2V, even i can see the vcc Rf is 3.3v, is that normal?