Trouble reading GPS from "NEO-6" module

[Ioannis]

The module can tolerate up to 6V on Vdd but the Tx/Rx are 3.6 max. This can be a problem if your PIC is supplied at 5V.

The site you posted says:

" To use with a 5V logic device, such as an Arduino, we suggest level shifting the 5V TX signal using one of the following:
Two 1N4148 diodes in series between the TX pin on your 5V device and the RX pin on this GPS module (will drop voltage to ~3.6V)"

Page 8 of GPS datasheet
"1.8 Raw data
Raw data output is supported at an update rate of 5 Hz on the NEO-6T and NEO-6P. The UBX-RXM-RAW
message includes carrier phase with half-cycle ambiguity resolved, code phase and Doppler measurements,
which can be used in external applications that offer precision positioning, real-time kinematics (RTK) and
attitude sensing."

Note that the module can output 3 protocols, NMEA, UBX and RTCM. See 1.15 section for setting protocol. If you want NMEA make sure that you have configured it propelry, that is CFG_COM0 and CFG_COM1 pins at logic 1.

Also I would set CFG_GPS0 at logic 1 also for maximum performance and NO sleep.

Ioannis

[CuriousOne]

I connected it directly to the PC via USB<>TTL serial adapter and with own software, u-center, it works fine - locks satellites, displays position, displays time.
As I understand, I need to care for this line only:

$GNZDA,202437.000,21,07,2024,,*48

So I believe that issues are related with maybe voltage levels, I'll try to add some resistor dividers tomorrow and will check again.

[CuriousOne]

Fixed!

Issue was with AI error - it suggested GPRMC as sequence to wait, but in real life it is GNRMC.
Fixed it and everything works fine, even with software serial.