ok i now connected the new sensor and it worked for a few minutes than it was showing a completly wrong lamda value ( 0,88 was normal, now 1,88). and it freezes again. after multiple restarts it starts working but with wrong value again. its freezin while heating and sometimes while showing the logo.

everythin is wired correctly so i orderes a new sensor hope it works

i am happy with the small display but got new problems while finally running it in the car

Hello Christian, i have built in the lambda controller but i have now 2 problems. After a few minutes the controller stops working. It just freeze. this problem was from the beginning. The second problem is awkward, it just shows me 10.12 Lambda ( i think its the maximum value). perhaps i wired the ...

i think this is going to be to complicated for me. i am happy that this is working on the small display. you can try writing a programm for the big 1.5 inch display. and try if you can speed it up using I2C. if not then spi is ok

Ok it worked with I2C. I forgot to connect DC to ground. But the FPS were so terribly slow, because its a 16 bit grey display.
So back to the 1.3inch display. maybe i will find a bigger one and try again. so far thank you christian.

Is this my serial output ?

0,1,-1,307,447,79,833
0,1,-1,306,447,78,831
0,1,-1,306,447,79,832
0,1,-1,307,448,79,834
0,1,-1,307,448,80,835
0,1,-1,308,448,80,836
0,1,-1,309,448,81,838
0,1,-1,308,448,79,835

yes there is an i2c for the display but there is no lib. the olikraus does not work...

OK didnt thought about that. I'm now using 13,12,11,9,8. But still just loading screen. Am i using more used pins ?

NOO it is working. i am using the WaveShare 128x128 1,5inch display with this : U8G2_SSD1327_EA_W128128_1_4W_HW_SPI u8g2(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8); But my problem is the code does not start. it is just showing me the logo but nothing else. the less are not flashing. if i chang...

Thank you very much worked very well i just changed a bit because "lambdavalue" was not declared but i wanted the 2 decimals als the time. now i am struggling using a bigger display from u8g2 lib. its working with olikraus and i changed in your program but didn't work maybe because its spi...