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I had the same issue for a while. It is probably caused by a poor connection or the code starting the display. Try other jumper cables and try some delay before you print the text. And please try without Arduino connected, just the Tiny powered.
Here is what I did in the end: https://arduino.stackexchange.com/questions/29546/attiny85-i2c-lcd
As requested :) Works like a charm, the comb is real 'wood' from Alie, to locate it use this search string: "Paradise 2016 Natural Health Peach Wooden Mahogany Comb Present Comb"
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Finally found the solution. Details: http://arduino.stackexchange.com/questions/29546/attiny85-i2c-lcd
The libraries are not the same. This setup with the LiquidCrystal_I2C from the Arduino website does not work. As mentioned earlier, I have tried your configuration with pull-ups. It was absolutely not a hardware issue.
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What is the power consumption? Wonder if I can run this on a coin cell for some time
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I only put these two lines in the Loop to actually see the data on the serial monitor, took me a day or two to figure that out! Not sure why it fixed anything.. unsigned int data = man.getMessage(); Serial.println(data);
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Followed the steps exactly and the IDE returns this error: /home/thijs/.arduino15/packages/ATTinyCore/hardware/avr/1.1.1/libraries/Wire/Wire.cpp: In member function 'void TwoWire::setClock(uint32_t)':/home/thijs/.arduino15/packages/ATTinyCore/hardware/avr/1.1.1/libraries/Wire/Wire.cpp:85:3: error: 'TWBR' was not declared in this scope TWBR = ((F_CPU / frequency) - 16) / 2;
Replaced the receiver with a Pro Mini for the photo, LiquidCrystal does not work for me on the ATTiny no matter what I try.
ok :) haha. I also thought I screwed up the 2 wires, switched them over but then the display goes all crazy, flickering or no backlight at all. pin5->sda, pin7->scl
This one: http://playground.arduino.cc/Code/USIi2c
Thanks, I've followed the link, then followed all the steps, it's not clear what core the guy uses but I tried it with multiple cores and still get the same result. Black boxes on one line. Attached it to the Nano directly and then it works fine, must be something about the Tiny I do wrong..
I've sent you a private message to keep things 'clean' in here.
I get no errors but only black squares. Followed the instructions carefully and tested the LCD with Arduino Nano first.
Great stuff, the communication works very good. The LiquidCrystal seems to be a much harder nut to crack, I'm using TinyWireM and a LiquidCrystal library with Tiny85 support but still I get nothing more than a flashing backlight :( Ant more information on your display setup is welcome!
Receiving and sending data between Attiny85 (Arduino IDE 1.06) UPDATED Nov 2015
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