SSD1306 problems on PI Zero

[angr_mgmt]

Hi,

i was trying pretty hard to get the ssd1306 oled display working on my raspberry, but i can't really figure it out, because there seems to be a problem with the actual bus communication that i'm unable to debug unfortunately.

The display board is that one: http://www.ebay.de/itm/Blue-0-96-IIC-I2 ... 1297157720
which should be able to communicate using 4-wire spi by default the back side states that some resistors need to be added for i2c or 3 wire spi. A possible point of failure might be that you have to remove some other resistors to make 4-wire spi available - but i don't really know and those sellers can't provide much info.

I used the following pinout:

CS->#24
CLK->#23
D1=Mosi->#19
RST->#8
DC->#10
VCC->#1
GND->#6

And i sticked to the Adafruit tutorial thus using the Adafruit-Python-SSD1306 code. Those examples seem to fail with the following messages:

pi@raspberrypi:~/Adafruit_Python_SSD1306/examples $ python shapes.py
Traceback (most recent call last):
File "shapes.py", line 70, in <module>
disp.begin()
File "build/bdist.linux-armv6l/egg/Adafruit_SSD1306/SSD1306.py", line 147, in begin
File "build/bdist.linux-armv6l/egg/Adafruit_SSD1306/SSD1306.py", line 289, in _initialize
File "build/bdist.linux-armv6l/egg/Adafruit_SSD1306/SSD1306.py", line 128, in command
File "build/bdist.linux-armv6l/egg/Adafruit_GPIO/I2C.py", line 114, in write8
File "build/bdist.linux-armv6l/egg/Adafruit_PureIO/smbus.py", line 236, in write_byte_data
IOError: [Errno 5] Input/output error

The SPI and I2C bus was properly enabled using the raspi-config tool and show up:
pi@raspberrypi:~/Adafruit_Python_SSD1306/examples $ ls /dev/ | grep spi
spidev0.0
spidev0.1
pi@raspberrypi:~/Adafruit_Python_SSD1306/examples $ ls /dev/ | grep i2c
i2c-1

I've got the python i2c and smbus libs installed.

But the display stays black all the time, the code fails, and after some days of trying everything google threw on me, i kinda got desperate and thought that i might have success with asking for help here.

So is anybody running the same display circuit board (as it could be a problem with that board?), or has a different hint on what else to try: you're very very welcome!

Thank you!

[bowen73]

Hi, did you get anywhere with this?

ive got the same with a pi zero and am fairly new to it but can get it come on. the guy i got the screen from off amazon sent me this: http://raspberrypi4u.blogspot.co.uk/201 ... d-i2c.html but it doesnt really help and still cant get the screen to come or do anything

thanks

[bitbank]

Hi,

i was trying pretty hard to get the ssd1306 oled display working on my raspberry, but i can't really figure it out, because there seems to be a problem with the actual bus communication that i'm unable to debug unfortunately.

The display board is that one: http://www.ebay.de/itm/Blue-0-96-IIC-I2 ... 1297157720
which should be able to communicate using 4-wire spi by default the back side states that some resistors need to be added for i2c or 3 wire spi. A possible point of failure might be that you have to remove some other resistors to make 4-wire spi available - but i don't really know and those sellers can't provide much info.

I used the following pinout:

CS->#24
CLK->#23
D1=Mosi->#19
RST->#8
DC->#10
VCC->#1
GND->#6

And i sticked to the Adafruit tutorial thus using the Adafruit-Python-SSD1306 code. Those examples seem to fail with the following messages:

pi@raspberrypi:~/Adafruit_Python_SSD1306/examples $ python shapes.py
Traceback (most recent call last):
File "shapes.py", line 70, in <module>
disp.begin()
File "build/bdist.linux-armv6l/egg/Adafruit_SSD1306/SSD1306.py", line 147, in begin
File "build/bdist.linux-armv6l/egg/Adafruit_SSD1306/SSD1306.py", line 289, in _initialize
File "build/bdist.linux-armv6l/egg/Adafruit_SSD1306/SSD1306.py", line 128, in command
File "build/bdist.linux-armv6l/egg/Adafruit_GPIO/I2C.py", line 114, in write8
File "build/bdist.linux-armv6l/egg/Adafruit_PureIO/smbus.py", line 236, in write_byte_data
IOError: [Errno 5] Input/output error

The SPI and I2C bus was properly enabled using the raspi-config tool and show up:
pi@raspberrypi:~/Adafruit_Python_SSD1306/examples $ ls /dev/ | grep spi
spidev0.0
spidev0.1
pi@raspberrypi:~/Adafruit_Python_SSD1306/examples $ ls /dev/ | grep i2c
i2c-1

I've got the python i2c and smbus libs installed.

But the display stays black all the time, the code fails, and after some days of trying everything google threw on me, i kinda got desperate and thought that i might have success with asking for help here.

So is anybody running the same display circuit board (as it could be a problem with that board?), or has a different hint on what else to try: you're very very welcome!

Thank you!

You've got an I2C display (4-wire), yet you're mentioning SPI and pinouts for an SPI device. I've got a clone of that display and you should connect it to the RPi Zero I2C bus as follows:

OLED ----- RPi Zero
Vcc -> pin 1 (3.3v)
GND -> pin 6 (GND)
SDA -> pin 3 (SDA)
SCL -> pin 5 (SCL)

You can use the Adafruit code to test it or if you prefer a simple C program, you can use my code:

https://github.com/bitbank2/oled_96

[drjam]

i am looking for answers too.
its really put a damper on my enthusiasm to make and deploy raspberry solutions sadly...
ive tried at least 10 different installs, adafruits, rmhull, alien-DNA-buttprobes everything.... i hate when people change code bases without keeping the old stuff available.

[bitbank]

i am looking for answers too.
its really put a damper on my enthusiasm to make and deploy raspberry solutions sadly...
ive tried at least 10 different installs, adafruits, rmhull, alien-DNA-buttprobes everything.... i hate when people change code bases without keeping the old stuff available.

What's your question and what code base changes are you talking about?

[drjam]

Wow thanks for the fast reply!
I went to bed after finding out my issue:

Multiple library installs,updates, removes and much yelling on a single pi zero and no oled display.

I started from a fresh wheezy Raspbian lite, and noticed one other SMALL issue.... my ground wire was connected to gpio 4, not the ground pin next to it.



O....m.....g....

[DirkS]

I started from a fresh wheezy Raspbian lite

That's impossible... Wheezy is old and stale and smelly and has been for a long time.

[drjam]

Lol. For some reason j thought there was a new raspian after Jessie. STRETCH is it's name
...hahahahha ok