# SparkFun Flexible Grayscale OLED Breakout - 1.81" Arduino Uno Rev3 **URL:** \ **Category:** Displays\ **Created:** [April 12, 2021, 1:07pm UTC](https://community.sparkfun.com/t/sparkfun-flexible-grayscale-oled-breakout-1-81-arduino-uno-rev3/41960 "2021-04-12T13:07:02Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![donskogvito86](https://avatars.discourse-cdn.com/v4/letter/d/a4c791/32.png) [@donskogvito86](https://community.sparkfun.com/u/donskogvito86)\ **Post date:** [April 12, 2021, 1:07pm UTC](https://community.sparkfun.com/t/sparkfun-flexible-grayscale-oled-breakout-1-81-arduino-uno-rev3/41960/1 "2021-04-12T13:07:02Z")
Hello, I recently purchased the SparkFun Flexible Grayscale OLED Breakout - 1.81". However, following the hookup table guide for Arduino Uno, I can’t display on at all. Is this tested and verified for the Uno Rev3? Product page: [https://www.sparkfun.com/products/14606 … 1d7c5780f3](https://www.sparkfun.com/products/14606#comment-60742ea77ac0c01d7c5780f3) Reference hookup table guide: [https://learn.sparkfun.com/tutorials/fl … 1614721076](https://learn.sparkfun.com/tutorials/flexible-grayscale-oled-hookup-guide?_ga=2.220030746.2024284547.1618222872-614248905.1614721076) Any help would be very much appreciated. Thank you. ---
**Author:** ![TS-Chris](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/ts-chris/32/6057_2.png) [@TS-Chris](https://community.sparkfun.com/u/TS-Chris)\ **Post date:** [April 12, 2021, 3:13pm UTC](https://community.sparkfun.com/t/sparkfun-flexible-grayscale-oled-breakout-1-81-arduino-uno-rev3/41960/2 "2021-04-12T15:13:09Z")
These have been tested on an Uno and should work for basic text on the Uno. Can you send a photo showing the top and bottom of your board and a photo showing how you have things connected to the Uno? ---
**Author:** ![donskogvito86](https://avatars.discourse-cdn.com/v4/letter/d/a4c791/32.png) [@donskogvito86](https://community.sparkfun.com/u/donskogvito86)\ **Post date:** [April 12, 2021, 3:52pm UTC](https://community.sparkfun.com/t/sparkfun-flexible-grayscale-oled-breakout-1-81-arduino-uno-rev3/41960/3 "2021-04-12T15:52:44Z")
Thank you for your quick reply. Right now the breakout board is standing on headers on a bread board connected to the UNO. I haven’t soldered anything yet. Connections is wired up following your hookup reference for Arduino. Im using the library from the guide, e.g the Hello World program. I think it is version 1.4. Images attached showing connections and wiring from the breakoutboard to the Arduino. [[![](https://canada1.discourse-cdn.com/sparkfun/original/2X/0/090360fadf3d81a4c72fb32afee134b0e42fdba1.jpeg) ![](https://canada1.discourse-cdn.com/sparkfun/original/2X/0/090360fadf3d81a4c72fb32afee134b0e42fdba1.jpeg)](https://ibb.co/TRzZrZk) [[![](https://canada1.discourse-cdn.com/sparkfun/original/2X/b/b371cec5f9b269bd2b1b3c4ad8c0a077decf2022.jpeg) ![](https://canada1.discourse-cdn.com/sparkfun/original/2X/b/b371cec5f9b269bd2b1b3c4ad8c0a077decf2022.jpeg)](https://ibb.co/6rGKwqb)]([20210412-174022-compress84 hosted at ImgBB — ImgBB](https://ibb.co/6rGKwqb))]([20210412-173954-compress68 hosted at ImgBB — ImgBB](https://ibb.co/TRzZrZk)) ---
**Author:** ![TS-Chris](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/ts-chris/32/6057_2.png) [@TS-Chris](https://community.sparkfun.com/u/TS-Chris)\ **Post date:** [April 12, 2021, 4:30pm UTC](https://community.sparkfun.com/t/sparkfun-flexible-grayscale-oled-breakout-1-81-arduino-uno-rev3/41960/4 "2021-04-12T16:30:53Z")
Are your headers soldered to the display board or are they just stuck through the holes? ---
**Author:** ![donskogvito86](https://avatars.discourse-cdn.com/v4/letter/d/a4c791/32.png) [@donskogvito86](https://community.sparkfun.com/u/donskogvito86)\ **Post date:** [April 12, 2021, 4:36pm UTC](https://community.sparkfun.com/t/sparkfun-flexible-grayscale-oled-breakout-1-81-arduino-uno-rev3/41960/5 "2021-04-12T16:36:35Z")
They are just stuck through the holes. I’m fairly new to electronics and I realize this might be the issue. I will solder tonight and return back with the result. I assume this is what you would recommend as well? ---
**Author:** ![TS-Chris](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/ts-chris/32/6057_2.png) [@TS-Chris](https://community.sparkfun.com/u/TS-Chris)\ **Post date:** [April 12, 2021, 4:38pm UTC](https://community.sparkfun.com/t/sparkfun-flexible-grayscale-oled-breakout-1-81-arduino-uno-rev3/41960/6 "2021-04-12T16:38:39Z")
Yeah, they need to be soldered so that you get a good electrical connection between the pins and the board. That should clear up your issue. 🙂 ---
**Author:** ![donskogvito86](https://avatars.discourse-cdn.com/v4/letter/d/a4c791/32.png) [@donskogvito86](https://community.sparkfun.com/u/donskogvito86)\ **Post date:** [April 19, 2021, 9:09am UTC](https://community.sparkfun.com/t/sparkfun-flexible-grayscale-oled-breakout-1-81-arduino-uno-rev3/41960/7 "2021-04-19T09:09:17Z")
I just wanted to let you know that once I soldered everything it worked. [[![](https://canada1.discourse-cdn.com/sparkfun/original/2X/5/53dd35e88f1e42b915f39308768a18c10647b93f.jpeg) ![](https://canada1.discourse-cdn.com/sparkfun/original/2X/5/53dd35e88f1e42b915f39308768a18c10647b93f.jpeg)](https://ibb.co/5Gb4rtR) However, only a small part of the screen has full brightness. [[![](https://canada1.discourse-cdn.com/sparkfun/original/2X/2/2dcaf1d6f8fd17a40f8de5149d146b44cc148641.jpeg) ![](https://canada1.discourse-cdn.com/sparkfun/original/2X/2/2dcaf1d6f8fd17a40f8de5149d146b44cc148641.jpeg)](https://ibb.co/QCHyLw1) Perhaps not related but when I pass a value to the screen counting from 0 to 1 suddenly this happens. [[![](https://canada1.discourse-cdn.com/sparkfun/original/2X/c/c42605422845bc196e673eca695bee6fda60c92c.jpeg) ![](https://canada1.discourse-cdn.com/sparkfun/original/2X/c/c42605422845bc196e673eca695bee6fda60c92c.jpeg)](https://ibb.co/HxTP0P5) [[![](https://canada1.discourse-cdn.com/sparkfun/original/2X/d/d6c145892a08a3794eb74e2c8b1683194c66b14a.jpeg) ![](https://canada1.discourse-cdn.com/sparkfun/original/2X/d/d6c145892a08a3794eb74e2c8b1683194c66b14a.jpeg)](https://ibb.co/vBcbB3b) Any advice or suggestions that can help me on my way is highly appreciated. Here’s my code: ```auto /* Program for the 1960s Panco of Norway table top Mini-Match. */ //Sparkfun Flexible Grayscale Oled was the only display to fit the narrow space of the game. #include //Initialize the display with the follow pin connections SSD1320 flexibleOLED(10, 9); //10 = CS, 9 = RES //Variables for the two goals int Home; int Away; #define LEDPIN 13 //Pins for data connections for the breakbeam sensors #define SENSORPIN 7 //Initialize and define states for the breakbeam sensors int sensorState = 0, lastState = 0; void setup() { //Initializing Arduino's board LED for output. pinMode(LEDPIN, OUTPUT); //Initializing pin for input from the breakbeam sensor. pinMode(SENSORPIN, INPUT); //Activate the pullupp resistor for this pin to make the two sensor states clear for Arduino. digitalWrite(SENSORPIN, HIGH); //Start value for goals. Home = 0; Away = 0; flexibleOLED.begin(160, 32); //Display is 160 wide, 32 high flexibleOLED.clearDisplay(); //Clear display and buffer flexibleOLED.setFontType(1); //Large font flexibleOLED.setCursor(32, 6); flexibleOLED.print("MINI-MATCH"); flexibleOLED.display(); delay(2000); flexibleOLED.clearDisplay(); //Clear display and buffer } void loop() { // Read and save states of the sensor sensorState = digitalRead(SENSORPIN); // Show the goal values on the display flexibleOLED.setFontType(2); //7-segment display style characters, 10x16-pixels each. flexibleOLED.setCursor(15, 8); flexibleOLED.print(Home % 10); flexibleOLED.display(); if (sensorState == LOW) { digitalWrite(LEDPIN, HIGH); } else { digitalWrite(LEDPIN, LOW); } if (!sensorState && lastState) { Serial.println("1 Broken"); Home = Home + 1; } lastState = sensorState; } ``` ]([https://ibb.co/vBcbB3b](https://ibb.co/vBcbB3b))]([https://ibb.co/HxTP0P5](https://ibb.co/HxTP0P5))]([2021-04-19-10-56-52 hosted at ImgBB — ImgBB](https://ibb.co/QCHyLw1))]([2021-04-19-10-58-18 hosted at ImgBB — ImgBB](https://ibb.co/5Gb4rtR)) ---
**Author:** ![donskogvito86](https://avatars.discourse-cdn.com/v4/letter/d/a4c791/32.png) [@donskogvito86](https://community.sparkfun.com/u/donskogvito86)\ **Post date:** [April 19, 2021, 12:07pm UTC](https://community.sparkfun.com/t/sparkfun-flexible-grayscale-oled-breakout-1-81-arduino-uno-rev3/41960/8 "2021-04-19T12:07:00Z")
For some reason adding the ``` flexibleOLED.setContrast(255); ```to The issue with only a small area of the screen is lit persists unfortunately :cry: ```