Issue on pi1

[dreamonhigh]

hello, I love it.

one thing I cannot solve. `#!/usr/bin/python3 from RPLCD.i2c import CharLCD lcd = CharLCD('PCF8574', 0x27)

lcd = CharLCD(i2c_expander='PCF8574', address=0x27, port=0, \ cols=20, rows=2, dotsize=8,charmap='A02', \ auto_linebreaks=True, backlight_enabled=True) lcd.clear() lcd.cursor_pos = (0, 0) lcd.write_string('hello ..')`

this script works fine on a pi3 by setting "port=1". On pi1 I have to set port=0 but this don't work. It shows self.SMBus(self._port) → FileNotFound: [Errno2] No such file or directory

PI1: i2cdetect -y 0 → shows 27 as I2C address PI3 i2cdecect -y 1 → shows 27 as I2C address but RPLCD.i2c/SMBus don't handle port=0 on PI1 the right way I think. I also tried port=1 on PI1 with same error. by the way, setting port=0 on PI3 it shows same error. but using port=1 on PI3 works fine!

maybe a PI1 issue?

[dreamonhigh]

I tried following example on PI1 and it worked with port=0 So it seams to be a RPLCD issue. maybe default port=1 is always set?

`#!/usr/bin/python3

import smbus

bus = smbus.SMBus(0) # 0 = /dev/i2c-0 (port I2C0), 1 = /dev/i2c-1 (port I2C1)

DEVICE_ADDRESS = 0x27 #7 bit address (will be left shifted to add the read > DEVICE_REG_MODE1 = 0x00 DEVICE_REG_LEDOUT0 = 0x1d

Write a single register

bus.write_byte_data(DEVICE_ADDRESS, DEVICE_REG_MODE1, 0x80)

Write an array of registers

ledout_values = [0xff, 0xff, 0xff, 0xff, 0xff, 0xff] bus.write_i2c_block_data(DEVICE_ADDRESS, DEVICE_REG_LEDOUT0, ledout_values) `

[dreamonhigh]

But testsuite works fine. I'm totally confused. Here port=0 works on PI1..

./rplcd-test.py i2c testsuite expander=PCF8574 addr=0x27 port=0 cols=20 rows=4 charmap=A02

[dreamonhigh]

my fault. did "lcd = CharLCD" twice. so stupid.

Sorry

[dbrgn]

@dreamonhigh haha, no worries 🙂 Great to hear that it works now.