forum.pistar.uk

1. Enable I2C,-->https://learn.sparkfun.com/tutorials/raspberry-pi-spi-and-i2c-tutorial#i2c-on-pi


i2c is already enabled in Pi-Star.


sudo make Makefile.Pi.PCF8574


You shouldn't have to build a custom MMDVMHost, Pi-Star is already configured to work with a HD44780.


Thank you for ...

Open Source
sch,pcb,gerber file-->https://gitee.com/fiftyhz/BI1IZF/tree/master/MMDVM_PCF8574_HD44780
you can DIY PCB,Of course you can also buy the PCF8574 module. :D
1. Connect PCF8574 to Raspberry,VCC to VCC, SDA to SDA, SCL to SCL, GND to GND.The backlight cannot be controlled by PCF8574,
it ...