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I replaced the TX cable and I saw data! I had a bunch of cables and most of them do not make contact. I found a few that may work. As a result, fortunately it was a wiring issue. Thanks all for the help!

I uploaded the code and I got the following. Probably this is bad?

I check that and they are connected correctly as you said.

Unfortunately not. Can I use a multimeter somehow just to measure voltage? (I'm quite new to this stuff). Yes there is a LED on the GPS which at first is solid which means it is does not have a fix yet and later it starts blinking which means it got a fix. This works as expected.

Tested again with Serial5 and 3.3V. Same results. (also changed the USB cable connecting Teensy to the PC, just in case) void setup(){ Serial.begin(9600); Serial5.begin(9600); } void loop(){ while (Serial5.available() > 0){ char gpsData = Serial5.read(); Serial.write(gpsData)...

Yes, I used 5V but at some point I used the 3.3V pin as well but with the same end result. I will switch back to 3.3V and use another serial port, just in case. I also tried this example https://icircuit.net/arduino-esp32-hardware-serial2-example/3181 (I modified the code a bit), just to check...

Yep, I run that and it just continuously prints "Hello World " and the increasing number. Nothing more.

Thanks for the answer. I tried 4800 baud rate but nothing received. Just to mention, I have tried other serial ports as well. EDIT: I have also changed the wires connecting the Teensy with the GPS module, just in case.

Hello, I'm trying to receive data using a Teensy 4.1 and a GPS module but with no success. At first I just want print the NMEA data at the terminal but I receive nothing. This is code I'm using. The RX/TX pins of the GPS module are connected to the pins 7/8 of the Teensy (The TX of the GPS...