Closed martiinezz closed 5 years ago
Hi, make sure you are using the development branch. please try the following, in open_evse.h:
Ok, my bad. In the meantime I've build Barbouri THT version and it works fine with your hints. Turned out that by mistake I soldered 24 MHz crystal onto SMD version hence the garbage on the screen. Now what I get is vent error and I don't know how to wire button as PCF expander 8 pins are all used up by LCD.
Glad you go it working. You don't have to use I2C for the button. Just look open_evse.h I checked in yesterday. There are instructions for using a SPST-NO button on any available ATmega328P I/O pin. Just set BTN_REG/BTN_IDX properly and connect the switch between the I/O pin and GND.
martiinezz, did you figure out the button pin input, I run a PCF8574 based LCD on some of my builds, and use one of the 6-pin ISP header pins for the button input.
Hi,
I've been trying to compile firmware with PCF8574 support without luck. I have monochrome based LCD. So far I did get some garbage on the screen while display works great with this library: http://www.mathertel.de/Arduino/LiquidCrystal_PCF8574.aspx
What I did in the code: (openevse.ino) // if using I2CLCD_PCF8574 uncomment below line and comment out LiquidTWI2.h above
include "./LiquidCrystal_I2C.h"
I don't see LiquidTWI2.h anymore. Just doing this didn't help - display acted like dead. So next I did (openevse.h)
// Support PCF8574* based I2C backpack using F. Malpartida's library // https://bitbucket.org/fmalpartida/new-liquidcrystal/downloads
define I2CLCD_PCF8574
No luck as well.
I get garbage (and it's dynamic I can see data changes on the display) only when I do:
define I2LCD
but on the other hand there is
ifndef I2CLCD
undef I2CLCD_PCF8574
endif
I have tried several combinations without luck.
I have also tried to replace LiquidCrystal_I2C.h with LiquidCrystal_PCF8574.h but it seems wire and twi libraries are tied with LiquidCrystal_I2C and it's beyond my skills to fix that :(