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I am most of the way through a Fermentrack-controlled fermentation chamber build, and want to add an LCD display. This is with RPi 4 and Arduino Uno, and I'm a complete noob with this stuff, as you will see by my description and questions below.
Fermentrack is installed (very slick btw!), with three temperature sensors hooked up. The sensors all seem to be working, and Fermentrack is controlling the heat and cool relays as expected.
I have a 20x4 I2C LCD and tried hooking it up with the SDA pin to the arduino A4 and SDL to A5, plus the 5V and ground connections. All I get is a backlight with no text. So, questions:
1- is the 4 pin LCD appropriate for this application?
2- if I am hooking this up wrong how should this be connected to the arduino board?
3 - should the LCD be recognized on Fermentrack, and if so is there anything I need to do to enable it? It lists A5 as an available pin, but not sure what to do with that in Fermentrack?
4 - is there anything I need to do on the software side, outside of Fermentrack?
5 - any other info needed about my setup in order to help?
Thanks for any guidance!
Fermentrack is installed (very slick btw!), with three temperature sensors hooked up. The sensors all seem to be working, and Fermentrack is controlling the heat and cool relays as expected.
I have a 20x4 I2C LCD and tried hooking it up with the SDA pin to the arduino A4 and SDL to A5, plus the 5V and ground connections. All I get is a backlight with no text. So, questions:
1- is the 4 pin LCD appropriate for this application?
2- if I am hooking this up wrong how should this be connected to the arduino board?
3 - should the LCD be recognized on Fermentrack, and if so is there anything I need to do to enable it? It lists A5 as an available pin, but not sure what to do with that in Fermentrack?
4 - is there anything I need to do on the software side, outside of Fermentrack?
5 - any other info needed about my setup in order to help?
Thanks for any guidance!