I’m currently working on a project to exend the Balenafin with RS 232 connections to external hardware. Unfortunately I can’t get it running. Hopefully you can help!
I removed every customization I made to the boot/config.txt file and added the appropriate overlay as stated in the setup.
Activated the SPI communication in the /boot/config.txt file.
I got the hardware interfaces in the /dev folder
Connected the custom Hardware and send via RS232, the light on the Hat flashed as it’s recieving data, but I can’t recieve data while listening to the ports with “cat /dev/…”
Before I connected the RS232 via the GPIO Ports and everything worked - what am I missing? Any ideas? Any help would be highly appreciated as I’m stuck with no ideas left.
Hello @chriswoj and welcome to our forums!
I guess when you say balena customized raspbian Image you mean balenaOS. If so which version? Also which version of the Fin do you have? 1.0 or 1.1 ?
Ohh ok, then since you are not on balenaOS and you are on raspbian I would expect the instructions to work as if you had a Pi. Also which raspbian release did you use full, lite? Also which version of the fin did you use 1.0 or 1.1?
This seems quite a specialised HAT, so I’m not sure if we’ll have someone who has tried it, especially on the Fin. But I’ll reach out to some of our engineers and see if they have any more suggestions of things to try.
By the way: was there a specific reason for using the Raspbian image over balenaOS? If not, it might be worth us investigating moving over, since balenaOS is updated more frequently.
I flashed the balenaOS to the fin, in order to give it a try, but how do I add the overlay? In the raspberry I modified the /boot/config.txt and added: