Renaud Richard asked 4 days ago
Hi,
First, as I already said, kudos for all your thorough work.
Now:
While trying your ssd1306 & RTC file I get:
File “<stdin>”, line 19, in <module>
File “ssd1306.py”, line 110, in __init__
File “ssd1306.py”, line 36, in __init__
File “ssd1306.py”, line 71, in init_display
File “ssd1306.py”, line 115, in write_cmd
I thought I correctly loaded ssd1306.py on the Pico.
I tried again by downloading a fresh ssd1306.py from another web source to no avail.
I’m sure the error is on my side. Any help will be appreciated.
Renaud
Sara Santos Staff answered 3 days ago
Hi.
Can you tell me exactly what’s the project you’re following?
How are you uploading the files to the Pico?
Regards,
Sara
Renaud Richard answered 2 days ago
Hi Sara,
Yes, of course, thanks.
I need RTC for a project so I tried this I get from your book I bought (which btw is excellent!) on a Pico2W with Thonny :
import time
import urtc
from machine import SoftI2C, Pin
import ssd1306
days_of_week = [‘Monday’, ‘Tuesday’, ‘Wednesday’, ‘Thursday’, ‘Friday’, ‘Saturday’, ‘Sunday’]
#Initialize RTC Module
i2c_rtc = SoftI2C(scl=Pin(5), sda=Pin(4))
rtc = urtc.DS1307(i2c_rtc)
# Initialize OLED
oled_width = 128
oled_height = 64
i2c_oled = SoftI2C(scl=Pin(7), sda=Pin(6))
oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c_oled, addr=0x3c)
This gets:
Traceback (most recent call last):
File “<stdin>”, line 19, in <module>
File “ssd1306.py”, line 110, in __init__
File “ssd1306.py”, line 36, in __init__
File “ssd1306.py”, line 71, in init_display
File “ssd1306.py”, line 115, in write_cmd
OSError: [Errno 19] ENODEV
So, I tried to load another ssd1306 from another site but got the same.
Also I tried scanning I2C bus:
on SDA=GP4, SCL=GP5… I2C devices found on 0x50 and 0x68
so the cabling is correct and anyway this error is certainly independent of the hardware as I tried it on another Pico without RTC or Oled and got the same errors.
To load the library I load the ssd1306.py file on Thonny and save it on the Pico. As I said it is indeed there at 4585 octets.
Best,
Renaud