AlexFW

Hey - you can't really do a direct port, but this library is very similar: https://github.com/tibounise/SSD1306-AVRAll you would need to do is do a few code changes to make sure that the drawBitmap functions are functionally equivalent. There's even a simulator for this one!

It looks like you have your board set incorrectly in the Arduino IDE. Change Tools->Board to ATtiny85. Also make sure the clock speed is set to 1MHz.

Bluetooth and WiFi are both transmitted via 2.4GHz radio waves.

This display could be a good output for any information that the voice assistant needs to provide to the user. This would also eliminate the need for voice synthesis as an output.

This is actually a pretty good idea for an extension of the project. Being physically not allowed to leave without checking your keys would definitely ensure that they're never left behind. The buzzer does annoy me but I guess that's the point :)

Magnetic door sensor is smart. I have had one or two false alarms when I walked past the door which were slightly annoying.

The nature of this project is less about losing your keys and more about leaving them behind when you leave a room. My door locks automatically, so if I leave my room without my keys I have a problem :)

I can tell you firsthand that it does work :) thanks for your vote

That’s a pretty good idea - it would even be possible to implement this functionality with the current hardware. The software could detect if the user waves their hand in front of the sensor and have the system enter bypass mode

The cable is bundled in with the display when you buy it from DFRobot. -Alex

The price is a little steep, but once you buy that board you can reuse it again and again. Additionally, it comes with some pretty cool technology integrated onto the PCB it comes with like an SD card reader and an integrated ARM processor. All the code is board-specific, so you'd need to modify it for any other microcontroller/display.

hi - this sounds like it could be a timing problem with your Servo library. What microcontroller are you using?

Thanks for your response. Adding those pin definitions for (__AVR_ATtiny84__) | defined(__AVR_ATtiny44__) worked perfectly. It actually does look like direct ports of previous sketches are possible. Since the definitions you provided are independent of the ATtiny core in use it should work with any core, right?

Hi, I have had a lot of success with your library on ATtiny85. Now I'm trying to get it to work on the ATtiny84 as well. I cannot compile any sketches that work on tiny85 because for some reason the lines of code with the USI are not working. I thought that since tiny84 and tiny85 both use a USI rather than physical I2C support this should work... The error message is below. Thanks!/var/folders/tr/zp_0970j0ld4_wq_yx8vnw_r0000gn/T/arduino_build_400141/sketch/USI_TWI_Master.cpp: In function 'void USI_TWI_Master_Initialise()':USI_TWI_Master.cpp:52: error: 'PORT_USI' was not declared in this scope PORT_USI |= (1<<PIN_USI_SDA); // Enable pullup on SDA, to set high as released state. ^USI_TWI_Master.cpp:52: error: 'PIN_USI_SDA' was not declared in this scope PORT_USI |= ...

Hi, I have had a lot of success with your library on ATtiny85. Now I'm trying to get it to work on the ATtiny84 as well. I cannot compile any sketches that work on tiny85 because for some reason the lines of code with the USI are not working. I thought that since tiny84 and tiny85 both use a USI rather than physical I2C support this should work... The error message is below. Thanks!/var/folders/tr/zp_0970j0ld4_wq_yx8vnw_r0000gn/T/arduino_build_400141/sketch/USI_TWI_Master.cpp: In function 'void USI_TWI_Master_Initialise()':USI_TWI_Master.cpp:52: error: 'PORT_USI' was not declared in this scope PORT_USI |= (1<<PIN_USI_SDA); // Enable pullup on SDA, to set high as released state. ^USI_TWI_Master.cpp:52: error: 'PIN_USI_SDA' was not declared in this scope PORT_USI |= (1<<PIN_USI_SDA); // Enable pullup on SDA, to set high as released state. ^USI_TWI_Master.cpp:53: error: 'PIN_USI_SCL' was not declared in this scope PORT_USI |= (1<<PIN_USI_SCL); // Enable pullup on SCL, to set high as released state. ^USI_TWI_Master.cpp:55: error: 'DDR_USI' was not declared in this scope DDR_USI |= (1<<PIN_USI_SCL); // Enable SCL as output. ^/var/folders/tr/zp_0970j0ld4_wq_yx8vnw_r0000gn/T/arduino_build_400141/sketch/USI_TWI_Master.cpp: In function 'unsigned char USI_TWI_Start_Transceiver_With_Data(unsigned char*, unsigned char)':USI_TWI_Master.cpp:200: error: 'PORT_USI' was not declared in this scope PORT_USI &= ~(1<<PIN_USI_SCL); // Pull SCL LOW. ^USI_TWI_Master.cpp:200: error: 'PIN_USI_SCL' was not declared in this scope PORT_USI &= ~(1<<PIN_USI_SCL); // Pull SCL LOW. ^USI_TWI_Master.cpp:205: error: 'DDR_USI' was not declared in this scope DDR_USI &= ~(1<<PIN_USI_SDA); // Enable SDA as input. ^USI_TWI_Master.cpp:205: error: 'PIN_USI_SDA' was not declared in this scope DDR_USI &= ~(1<<PIN_USI_SDA); // Enable SDA as input. ^USI_TWI_Master.cpp:238: error: 'DDR_USI' was not declared in this scope DDR_USI &= ~(1<<PIN_USI_SDA); // Enable SDA as input. ^USI_TWI_Master.cpp:238: error: 'PIN_USI_SDA' was not declared in this scope DDR_USI &= ~(1<<PIN_USI_SDA); // Enable SDA as input. ^/var/folders/tr/zp_0970j0ld4_wq_yx8vnw_r0000gn/T/arduino_build_400141/sketch/USI_TWI_Master.cpp: In function 'unsigned char USI_TWI_Master_Transfer(unsigned char)':USI_TWI_Master.cpp:280: error: 'PIN_USI' was not declared in this scope while( !(PIN_USI & (1<<PIN_USI_SCL)) );// Wait for SCL to go high. ^USI_TWI_Master.cpp:280: error: 'PIN_USI_SCL' was not declared in this scope while( !(PIN_USI & (1<<PIN_USI_SCL)) );// Wait for SCL to go high. ^USI_TWI_Master.cpp:288: error: 'DDR_USI' was not declared in this scope DDR_USI |= (1<<PIN_USI_SDA); // Enable SDA as output. ^USI_TWI_Master.cpp:288: error: 'PIN_USI_SDA' was not declared in this scope DDR_USI |= (1<<PIN_USI_SDA); // Enable SDA as output. ^/var/folders/tr/zp_0970j0ld4_wq_yx8vnw_r0000gn/T/arduino_build_400141/sketch/USI_TWI_Master.cpp: In function 'unsigned char USI_TWI_Master_Start()':USI_TWI_Master.cpp:298: error: 'PORT_USI' was not declared in this scope PORT_USI |= (1<<PIN_USI_SCL); // Release SCL.

Hi Jendrik - it might be that your board is fine. Some of the numbers are messed up on some versions of the board - so you can look on circuits.io and trace the route of the PCB trace just using your eye and see if it corresponds to the header you think it does. If you don't understand this or have any questions, let me know! Also make sure your programmer is set to whatever chip you're using. It's possible that you might have an ATtiny45 - they look identical but one last less memory.

Thanks, that's helpful to see the modeling process

Awesome job. I always have a tough time getting perf board projects to be compact and look nice - you succeeded in both accounts!

It looks like your board is set to Digispark. Digispark should be equivalent to ATtiny85, but try installing an ATtiny core and setting that as your board under tools in the Arduino IDE.

I like where you've taken this! Great work with the self-contained structure. It really looks nice. I think I recognize some of that code ;)

Thanks, I really like your library. I thought that I'd make an Instructable to help anyone who was struggling to get images to display like me.

I was actually planning on handing it to college admissions interviewers!

Aha! I've finally gotten it! Every single tutorial and page I've ever seen says the image orientation needs to be horizontal for the OLED to display it correctly. Out of desperation I tried vertical orientation ONCE and it appears to be working.

I've tried tons of different image to hex array converters, but none of them seem to function. All of them display a seemingly random assortment of pixels, except for solid white or solid black images, which makes sense. I've tried both the methods listed here: https://learn.adafruit.com/mini-thermal-receipt-printer/bitmap-printing , as well as a few online converters. All display the pixels in an incorrect order, which leads me to believe that the order they're encoded is not as you listed. Can you please share what tool you used to convert the images to hex arrays?