I am a new user of the realdash app, i am trying to setup an android tablet as dash wired to a maxxecu street through CAN connection.
for that im using a waveshare USB-CAN A adapter.
when i do connect the adapter to PC, i see the CAN data flowing in the waveshare configuration tool. so there is CAN traffic and connections are okay.
when connecting the adapter to tha tablet, im struggling to get it working properly.
when i connect the adapter to the tablet, the adapter is recognized and realdash automatically boots up when i plug the adapter in. the serial and CAN baud rates set in realdash do match these set to the adapter.
but when i open CAN monitor i dont see any data flowing, the window remains empty.
Sending frames on the CAN bus with realdash works, when i send a can message with realdash i see it on the CAN bus (an additional canalyzer connected to the bus).
in the android settings i did change the default USB settings to data transfer.
i do also see the usb setting “USB controlled by:”
currently this is set to “connected device” but i cannot change it to the tablet itself.
does anybody know, if this can cause my issue? and how to fix this so i can change it?
i tried another one, but symptoms are similar.
any ideas what could block realdash from reading CAN frames, but allowing realdash to transmit CAN messages?
I did not unfortunately, I used direct usb connection as intermediate solution. I have now bought a different tablet as my precieus one did not allow to charge and transfer data at the same time. However still having issues during intital testing using the waveshare adapter. I Will look into it further again once the new tablet is mounted.
If I cant get it working I might try with a different can to usb adapter to see if that makes any difference.
Hi, I signed up to the forum because I was having this exact issue except I’m using a Haltech Platinum Pro Plugin ecu.
Assuming you have set everything properly according to what your ecu’s canbus operates on (CAN speed etc) what fixed it for me was setting the Protocol to “variable length” and also ticking the “only send once” option in the CAN Configure section of the Waveshare tool.
I’m not sure which of those options fixed it but after 15 hours of trying to eliminate absolutely every possibility apart from replacing the adapter or ecu, I don’t want to mess with it again
If somebody can contact me i try to have support one week now my wave share adapter not working buy a other one same thing try with a pc instead of my adroid device keep having connecting at the bottom right and whene i go in can frame app crash
I try 3 differant baud rate the flashing on the adapter fit the baud rate i set
Can speed is set in the ecu and in the apps to 1mb
The rxt tx light not flashing i mean i cant reach this step the adapter wont connect to real dash i try to flip can hi and can low wire nothing happen i take a look at ecu for be sure im plugge at rhe right place and yes . The can network is working because whene i plug
My can lambda on ecu its working i try to remove it from the network too and nothing change
Yes i have 120ohm resistance 60ohm key on like it suposse i try to turn it off to and no change ! ..
I download the apps last week so i guess i have the last update and i delete and reinstall apps no change …
Thanks
This means there is no CAN connection between adapter and ECU. Those leds indicate activity as soon as adapter receives power from USB, even if RealDash is closed completely.
