[solved] Little help with Pi/serial/arduino

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Hi guys.
I have an arduino nano setup with a TCRT5000 sensor, found a little sketch online and now I can measure my power usage from my old meter.
When I open up a serial monitor on my laptop I see the data

Starting
Cycle 2 ms, 5047.32 W
Cycle 3 ms, 4349.80 W
Cycle 4 ms, 5122.73 W
Cycle 5 ms, 5133.69 W
Cycle 6 ms, 5985.04 W
Cycle 7 ms, 126.62 W
Cycle 8 ms, 3.00 W

When I connect it to my Pi, set the baud rate and open a cat /dev/ttyUSB0 I sometimes see “starting” and then some random garbish you also get when baud rate is wrong.
A few times I actualy saw the data but shortly after the same random characters

pi@raspberrypi ~ $ sudo stty -F /dev/ttyUSB0 57600
pi@raspberrypi ~ $ cat /dev/ttyUSB0
Starting

^C

What can it be, some buffer or something?

try it with 9600 baud

@leader21 You sir ar a genius Or my brain just had a meltdown.
I tried several baud rates and all the same effect, now I use 9600 and it works

@incmve said:

@leader21 You sir ar a genius

well, not really. you know, google is my best friend :joy

that actualy worked for a while.
I’m back at 0 without changing anything,
Arduino to my laptop:

Settings: 
600
101
104
6000
Debounce time (ms): 1000
Marker: 1184 ms (244 readings)
Done averaging
Discarding incomplete cycle.
Marker: 14 ms (3 readings)
Cycle 2: 7213 ms, 831.83 W
Marker: 21 ms (4 readings)

Arduino to the Pi:

Settings:

600

101

104

6000

Debounce time (ms): 1000

Marker: 1189 ms (245 readings)

Done averaging

then it goes quite, has to be something simple.

What do you send as line ending? Windows handles "\r\n" as new line, linux uses just \n.

This is my code
https://github.com/incmve/kWh/blob/master/kwh.pde
This code is used on other linux devices as far as I know and I can’t figure out what I am missing.

Found it :bowtie:
Thanks @sweetpi for pointing in the right direction!

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