REEF PI- USING SDA/SCL CONNECTIONS WITH GPIO PINS

[RobertoRC]

Hi all! I've been having some trouble with the SDA SCL pins in my Raspberry Pi for a while, I'm sure they are fried, so I changed the configuration to use them with the GPIO pins #17 and #18. I used these /boot/config.txt - dtoverlay=i2c-gpio,i2c_gpio_sda=17,i2c_gpio_scl=18 to configure it and worked fine but in the website I got the code it is said that a new bus was created /dev/i2c-3 and when in the terminal I write i2cdetect y -3 it seems that is recognizing my PCA9583 and a EZO pH circuit, but the lights are not dimming and the pH probe doesn't read anything when I configure them in REEF PI, so I was wondering if its a problem that I can solve. Thanks for your feedback!

 

[Peace River]

Let's see if we can get some help.

#reef-pi #controller @Ranjib

 

[RobertoRC]

#reef-pi #controller

 

[Ranjib]

Sorry for getting back late @RobertoRC . Unfortunately I have to do some code changes to support this. It’s a small one, but without it you won’t be able to use reef-pi to talk to the new i2c pins. Currently it’s assuming i2c-1 file. https://github.com/reef-pi/rpi/blob/master/i2c/i2c.go#L55

While I get back to fixing this and making it configurable, you can try hacking around by creating a symlink with the path expected by reef-pi. I don’t know if it will work or not as I have not tried this and I’m out in vacation , but it’s worth an attempt I think. Checkout this link https://unix.stackexchange.com/questions/445450/how-to-create-a-permanent-symlink-to-a-device , there may be a way to use udev rules to do this,

sudo ln -s /dev/i2c-3 /dev/i2c-1