Hello everyone, I have a question about the Opta Lite application. I need an I2C display, but I don't understand how to connect it. I hope you can help me.
Hi comest,
As far as I am aware I2C is not naturally supported on Arduino OPTA.
There might be some tricks , but you will loose the warranty and at your own risk.
See here: https://www.youtube.com/watch?v=1ZKdEHRozvM
This is not close to something I recommend.
With only a small account on Arduino Cloud you can see OPTA status, messages, etc, all over the internet.
If you really need a physical display I recommend to go for Opta Rs485 and get an HMI display with Modbus, then you can exchange MB / RS485 variables with the HMI. I think they have announced a couple of months ago a partnership with Weitek from US but any HMI will do the job. Maybe they will have an easy integration w/ Weitek, we;ll see.
something like this:
any question I might help.
I am quite satisfied with the IOT cloud dashboards by the way.
You can connect an LCD like the 20x4 or 16X2 I2C LCD through the AUX port on the side of the controller or the expansion module. If you look at the OPTA schematic you will see the AUX port has 5Vcc, Ground, SCL and SDA. You can send text to the LCD as you normally would in any UNO sketch for example.
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