Anyone know how I can get use pi_piper gem to use 4x20 LCD display (hd44780) with I2C converter (PCF8574). I'm totally noob in this part of programming.
I tried using ruby-i2c-devices gem, but hd44780 driver didn't work.
Any one know where I can find some examples (projects or guides with gem usage) or drivers for pi_pier gem?
I want to do this in Ruby. Pi-piper gem because it support PWM.
If there are other gems that provide I2C, PWM, 1 wire and GPIO support and have built-in drivers for LCD displays, I can switch to them.
Thanks in advance!