No IAT or CLT readings on A0/A1

No IAT or CLT readings on A0/A1#56969

By deecambo - Mon May 16, 2022 9:43 am

- Mon May 16, 2022 9:43 am #56969

Hello all, i have got a mega2560 loaded with speeduino, connected to a pi4 running tunerstudio. Ive been just messing around trying the different inputs and i cant get any readings from A0 or A1, IAT and CLT guages. A2 -A6 give me readings on their guages just nothing from A0-1.
Im just testing with a potentiometer and 0-5v atm, to learn abit about speeduino.
Does anyone have any ideas?
Thanks

Re: No IAT or CLT readings on A0/A1#56973

By pazi88 - Mon May 16, 2022 11:58 am

- Mon May 16, 2022 11:58 am #56973

Correct board selected?

http://www.youtube.com/pazi88

Re: No IAT or CLT readings on A0/A1#56980

By PSIG - Mon May 16, 2022 6:38 pm

- Mon May 16, 2022 6:38 pm #56980

...and calibrated?

If you look at a specific board-type schematic, you can see what pins are inputs and outputs (react or respond) such as this v0.4 family type. Earlier Fritzing versions are often easier to see the pin assignments.

-= If it was easy, everyone would do it =-

Re: No IAT or CLT readings on A0/A1#56985

By deecambo - Mon May 16, 2022 9:06 pm

- Mon May 16, 2022 9:06 pm #56985

Yes, tunerstudio has identified the mega2560 board, is there anywhere else that I should "select" it? I have tested all of the Analogue pins to see if CLT was set to another one but this didnt work. No pin from A0-A15 will give a CLT or IAT reading. I have TPS,FUEL,OIL pressure etc reading other pins nicely.
Thanks

Re: No IAT or CLT readings on A0/A1#56986

By jonbill - Mon May 16, 2022 9:34 pm

- Mon May 16, 2022 9:34 pm #56986

in engine constants, you need to select which speeduino board you have. 0.4.3 etc.

Last edited by jonbill on Mon May 16, 2022 9:51 pm, edited 1 time in total.

Re: No IAT or CLT readings on A0/A1#56987

By deecambo - Mon May 16, 2022 9:49 pm

- Mon May 16, 2022 9:49 pm #56987

Pretty sure i had that one sorted.
Thanks

Re: No IAT or CLT readings on A0/A1#56990

By LPG2CV - Tue May 17, 2022 7:02 am

- Tue May 17, 2022 7:02 am #56990

The reason the guys are banging on about selecting the correct board, is because with the issues you post, 99% of the time, the wrong board is selected.

Speedy defaults to v404, any other board than that, and you need to select the one you have. It does not detect.

Did you load a base tune?

How are you testing the pins? Is this on the bench, or attached to an engine which is running?

Edit

Hey ... just re read you first post, and you don't have a board, just a mega, so you will get odd readings. Even with a board attached, you get odd readings without sensors attached.

This is an excellent way to learn about TS though.

Mere Mortal

Re: No IAT or CLT readings on A0/A1#57001

By deecambo - Tue May 17, 2022 9:14 pm

- Tue May 17, 2022 9:14 pm #57001

Yeah, I've tied all the analogue pins to gnd except for the one I'm trying to get a reading from. This stops the others from jumping around or reading a signal from an adjacent pin. Just cant get a reading for clt or iat A0/1.

Re: No IAT or CLT readings on A0/A1#57071

By deecambo - Sat May 21, 2022 5:51 am

- Sat May 21, 2022 5:51 am #57071

I have been watching Josh's video "speeduino live coding introduction", in which he mentions a comm.ino file. I dont have that file nor does his github it seems. Has it been replaced in later updates maybe??

Re: No IAT or CLT readings on A0/A1#57072

By LPG2CV - Sat May 21, 2022 9:58 am

- Sat May 21, 2022 9:58 am #57072

on github, press the big green button and download the zip
the firmware will be in there somewhere. Though be aware that hardware and firmware are on separate gits.
To read the firmware, you will require
https://www.arduino.cc/en/software

regarding clt/iat, you cannot read them as they are expecting an input!

Mere Mortal