arduino lcd displays garbage for sale
Hi, i have and LCD 16x2 connected to my Leonardo. I works properly with all the examples son the connection is ok. But I add the LCD to another sketch and it"s just showing garbage, and i have no idea why. I just want to show "Writing:" in the first row, and the variable nombrearchivo in the second row. All of this works using serial, so my only problem is the LCD.
The lcd.clear function is slow and can lead to screen flicker especially if done every time through loop(). Overwrite old data with spaces, reset the cursor position and print the new data and only update the screen when the data changes will help prevent flicker.
Troubleshooting Code Problems: Start with a known good code base. Many times, pin port directions or the pin assignments have errors. One good technique is to write test code that toggles only one of the control pins, then verify that the correct pin at the LCD is toggling. Repeat this for each of the other pins. This exercise checks the signal path from the code all the way to the LCD.
If it is a serial LCD with a stream-style interface (CFA-632 or CFA_634) check to make sure that the baud rate set on the module matches the baud rate in your code.
Whether it is bringing up a new design, finding a new display for an existing design, or even getting an LCD to work on a Raspberry Pi or Arduino project, we are here to help.
One way of driving an LCD character display from uLisp is to buy an I2C/SPI backpack with-i2c or with-spi. The advantage of this approach is that the display becomes an output stream, and you can write to it using any of the uLisp output commands, including print, princ, prin1, terpri, write-line, and write-string.
Alternatively you can drive the display directly using the following program. This will run on all the uLisp platforms, down to the Arduino Uno (or Arduino Nano as in the above photograph), although if it forms part of a larger project you"ll probably need an Arduino Mega 2560 or better.
Tip: don"t fit pin headers to the pins D0 to D3 on the display module; these aren"t used, and leaving them unconnected may allow you to save some wiring between the Arduino board and the display module, as in my prototype in the photograph above.
If, however, the display is initially in 4-bit mode, as it would be if you just reset the Arduino, the first byte #x33 is interpreted as a single command:
Adding an LCD display to Arduino projects can add real value but the cost of doing so can be significant. Not a financial cost - you can pick up 16 (characters) x 2 (rows) LCD for as little as £3.50. The cost is the pin count it can take to drive them. Using the built-in LiquidCrystal Display library it can take as many as 6 pins! That does not leave much for your sensors, motors and other components.
There are many projects that discuss using alternatives - such as a much more expensive Serial LCD (£10 up). Other projects discuss using two-wire interfaces, increasing the complexity of your code. The simplest way to drive the HD44780 style LCDs, in my opinion, is to use a 74HC595 shift register, taking the pin count down to 3.
In any case, connecting an LCD either using the 595 Shift Register or the more traditional way takes a lot of wiring which is not only a super mess (unless you use a ribbon cable I guess), it takes time.
Connect the wires to the shift register, if you use the library as default you will connect Green to Arduino Pin 7, Blue to Arduino Pin 8, Yellow to Arduino Pin 9.
The method of using a shift register to drive these displays with only 3 pins seems to have originally documented by Stephen Hobley. He did a great job of adjusting the built-in LiquidCrystal Library so it works brilliantly with the 595 Shift Register. I have now updated this library to be compatible with Arduino 1.x and adjusted some of the Shift Register pin assignments to be easier to prototype with. You need to download the latest code. It is feature complete and should be a drop-in replacement for any project you already have.
I understand that you may not wish to make a shield before trying this method out - that is completely understandable. For you, I have this documented for breadboards too. Sure, you will have to deal with more hookup wire, but it gives you a great way of at least trying this 3-pin method without any soldering. That layout, more code and wiring explanations are available from http://rowansimms.com/article.php/lcd-hookup-in-seconds
I have this running great from an ATtiny85. It also has a TMP36 temp sensor to desplay the current temperature. LCD uses pins 0, 1, 2 and TMP36 uses pin 3.
It worked once and then started showing garbage values and never worked again. It shows a row of boxes whenever I power it up again, nothing else. Please help !
@bitteroz Had to swap the emitter and collector of the BC547 NPN transistor to make the back light work. Mistake in circuit drawings? Or is my LCD different ? I have a green one.
I have this running great from an ATtiny85. It also has a TMP36 temp sensor to desplay the current temperature. LCD uses pins 0, 1, 2 and TMP36 uses pin 3More CommentsPost Comment
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I am using this tutorial and it seems like my liquid display does not display characters. If you get a display but it is garbled or has some other problems then try again I will read all the threads for "LCD Blocks" and solder the LCD module and the connections, the problem might be in soldered connections make sure the
:confused: Ok, I"ve been working on an Arduino based Renix Jeep Scan tool for the last few 16x2 ST7066U LCD Glitch causes garbage text to scroll The bug that is most illusive and annoying has to do with the LCD bugging out and Alright, figure I"ll finish this thread off since I hate dead end threads with no resolution.
In this Arduino LCD Tutorial we will learn how to connect an LCD (Liquid You can watch the following video or read the written tutorial below. The blink() function is used for displaying a blinking cursor and the noBlink() function for turning off. the recommended things when it comes to that problem, only blue screen.
Programming Problem with a hand gesture controlled robot; the analogwrite() I am writing a class for a project which will take care of handling any LCD need to have a reference Variable to other Nodes,it"s children. which ends up giving I am trying to hack a cheap RC car as to be able to control it using my Arduino.
Servo Magazine 01 2005 - Free download as PDF File (.pdf), Text File (.txt) or read on inside of it. alphanumeric LCD display that uses the HD44780 driver it is wasteful of I/O pins on a microprocessor, it makes the One particularly tough problem faced by walking fires immediately, holds the Sitronix ST7066U.pdf.
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When the problem occurs, on the serial console the sensor"s values are correct. Also the values are uploaded on the server correctly. This means that the problem is on the lcd screen or the way i use the library. The garbage characters change about every 10 seconds and seem to have a relation between each other.
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The text should be displayed scrolling from first row fi. here i have attached the code, my problem is in lcd_print(), show the error as also how to properly include images/pictures; "Garbage" characters on a serial terminal LEDs, but does not cause the 1st LED to latch the shift register to the PWM units.
Weighted-Sequence Problem: ASP vs CASP and Declarative vs was able to identify the causes of suspicious MapReduce outputs. present summary and present full text, it is encoded as to the screen. trapped goal and garbage slot problems or are only appropriate for coarse-grain paral The LCD panel has 16x2.
What I notice is that the larger text, scrolling "MMDVM" and static "DMR", often logging set to zero (0) as that"s what is the cause for the visual corruption Same problem on rpi2 B v1.1with a96 screen. That causes each line of pixels to be off by 2 hence small valid text ends up looking like garbage.
Hello, i have a litle Problem with my I2C LCD Display. When i try to use the LCD from a function called by an Interrupt the Arduino freezes. The second issue is not always as obvious: Reentrancy ISR Reentrancy has 2 basic problems. If this continues to happen, you could end up with a stack overflow,
When I try to output any text or commands to the LCD after installing I have a similar lcd module and every time garbage was displayed it was a timing issue. is a date of manufacture sticker and some chinese characters, nothing else. Im trying to make it work with Spark Photon 3.3v with a 16x2 LCD.
So I did some research in the Arduino forums and found some code for using custom DFRobot Gravity I2C 16x2 Arduino LCD with RGB Font Display use universal Gravity I2C The problem is that the square wave PWM output from the Arduino at the rhydoLABZ INDIA 16x2 Character LCD Display Module With Yellow
I am having problems with a LCD: The LCD model is a TC1602A (16x2) I have it connected to the library After sending to the board the LCD displays the top row with 16 blocks and a blank bottom row. From what I have read in other forms this means that it is not initialized properly. This is correct.
RS232, etc. Works fine, but sometimes I get garbage on the LCD. We use 4x40 HD44780 compliant character based lcd"s in my teaching lab We often do What I do is to have a virtual LCD CGRAM (32 bytes for my 16x2 displays. I then put the characters into this virtual display as if it were an LCD.
Read about "16*2 LCD getting weird characters" on element14.com. Arduino Projects. Design Challenges. Design for a Cause ac motor controlled by a 5V relay) and output to an LCD the room temperature and the % of fan speed. The problem is when I connect both (or just one) AC loads, I always
The bug that is most illusive and annoying has to do with the LCD bugging out and scrolling a bunch of garbage characters across the screen. I notice that when the home button is pressed (brings you to a main menu with a 40 millisecond delay), the garbage will scroll much faster.
When I plug it in what it does it always displays all the black pixels in first row (5*8 When an LCD is only readable from a steep angle I suspect it is a problem with (read from another post Floresta: " With the potentiometer at one end of it"s
Hello, I have an arduino uno and a I2C LCD-display. My problem is that I can get the lcd display to blink but not to write text! bit for the entire message to arrive delay(100); // clear the screen lcd.clear(); // read all the available
Read about "16*2 LCD getting weird characters" on element14.com. It sounds like your arduino is not crashing, just the display is getting corrupted data. 2nd) Reinitialize the LCD after every time you turn on & off the Relay
My question is as same as "https://chillon.info/questions/53737450/how-to-get-. ReactJS MaterialUI Stepper breaks on overflow Using Audrino Nano and MKS SERVO42 42 Stepper Motor With Driver Board Closed Loop with the LCD.
Stack Overflow for Teams – Collaborate and share knowledge with a private group. I bought a new LCD screen and now my computer"s screen goes black for 1 Share a link to this question via email, Twitter, or Facebook.
hi all, I have connected my Arduino with my 16x2 lcd via 12c module. after loading code it shows only bright what could be the problem here? is lcd faulty? Buy I2C Module LCD Serial Display Adapter Online in India.
print(lcdTop)" puts one or more garbage characters on the screen, in my case, since print() is expecting a null terminated string. You may not notice this on a 16
After frying ( a JHD162A, I bought a JHD161A, a 16x1 display. But, even now I"m in dire straits. The LCD lights up, but all I can see is the 1st 8 blocks darkened
I followed the PCB traces and wired it to the Arduino like this. After uploading a LiquidCrystal example sketch and changing the display to 20x4 the LCD displays
Hi Guys! This is my first post here. I am tying to hook up a 16x2 LCD to an arduino uno. I am greeted with the most common problem(as I have heard). When I first
characters displaying. Wed Jun 18, 2014 5:04 pm. Hi everyone. I"m trying to use a LCD display with the HD44780 controller. I followed the following tutorial:
But this takes the biscuit. //Inclue Libraries we need #include
I can"t read Italian but it appears that you provided more information when you If you still have a problem then let us know what LCD you are using, what code
Hi! I"ve a strange problem with my LCD and the Hello world example that displays wrong characters (hgnno. wornf!) instead of "Hello, world!" if i try to print
hye there… i have buy lcd and arduino uno… i had wiring it… but only black box appear in I"ll report the bug/issue to try to get them to update the web page.
16x2 ST7066U LCD Glitch causes garbage text to scroll Feb 15, 2017 · When in 4 bit mode, if you ever get a glitch on the EN signal, the display and the host
Keep in mind that, for the LCD display controller you are using, the character Yes, and if the topic of discussion was the how a HD44780 based LCD character
LiquidCrystal Library - Hello World Demonstrates the use a 16x2 LCD display. the delay(200) after reading some threads with similar issue but same problem.
lcd. LCD is an abbreviation for Liquid Crystal Display. 6. 5. Arduino LCD not working. arduino lcd. Oct 22 "20 at 9:04 Community♢. 4. 1. QLCDNumber numbers
:confused: Ok, I"ve been working on an Arduino based Renix Jeep Scan tool for I had tracked down one screen glitch issue a while ago to not having enough
Hello everyone. I make a project: Arduino uno Ethernet shield 16x2 lcd screen IR receiver DHT22 sensor The arduino takes values from the sensor and sends
PART 1 Blog write up and photos at:http://www.toddfun.com/2013/02/07/arduino-frequency-display-for-kenwood-ts-520s-hf-ham-radio-part-1/PART 2 Blog write
LCD display does not show any text (display lights + contrast adjusted)?. c# raspberry-pi lcd Arduino LCD Display burger glitch a the end. arduino lcd.
I have a standard 16x2 LCD display, hooked to an Arduino Uno using 4 data pins, as described here, In short, RW is wired to ground, and RS, Enable, and
In the previous tutorial, we discussed scrolling long text strings on a character LCD using Arduino. However, it’s also possible to display custom characters on the LCD. These custom characters are user-defined and are stored in Character Generator RAM (CGRAM) of the LCD module.
Custom charactersThe character LCDs support ASCII characters that serve as a standard set of characters. The patterns for the supported characters are already stored in the memory (CGROM) of the LCD module. For printing these standard characters, the controller simply needs to “pass” the associated data register value to the address counter of the LCD.
That data register value is, then, stored in the DDRAM and the address counter is updated (and increased or decreased depending on the direction of the text). When the LCD has to print a character, it reads the value from the DDRAM, compares it with CGROM, and prints the character by generating the stored pattern for that character.
Sometimes it’s necessary to print user-defined characters/icons on an LCD. For example, you may be using an LCD module in a communication device and need to print a custom character showing the status of the connectivity. A character LCD may be embedded in a battery-operated device and it may be necessary to display the level of charging by using a custom icon.
The LCD modules, apart from DDRAM, have the CGRAM to store user-defined characters. To generate a custom character/icon, it’s necessary for the controller needs to pass the entire character pattern to the LCD module. This character pattern is stored in the CGRAM of the LCD. A 16×2 LCD module typically has enough CGRAM to store a pattern for 8 characters/icons.
The pattern for custom characters is defined as a group of 7, 8, or 10 bytes, depending on the number of rows of pixels for each character on the LCD. Each byte represents a row of pixels that form the character. The bits of the byte represents the status of the pixels (i.e. whether the respective pixels will turn on or off).
For example, on a 16×2 LCD, each character is printed as 5×8 dots. Therefore, 8 bytes (for 8 rows of pixels) are used to represent a character and 5 LSBs of each byte are used to turn on or off the pixels.
CGRAMMost of the character LCD modules use an HD4478 controller. There can be a different LCD controller on an LCD module. To know what controller is used in an LCD module, simply refer to its data sheet.
Depending on the size of the character LCDs, they have different DDRAM and CGRAM. For example, a 16×2 LCD has 80 bytes of DDRAM and 64 bytes of CGRAM. As there are 8 rows of pixels for each character, the pattern for 8 characters of 5×8 dots can be stored on the CGRAM.
The CGRAM addresses start from 0x40. The first character is stored from address 0x40 to 0x47. This custom character can be printed at the current cursor position by sending the command ‘0’ to the LCD module. The second custom character is stored from the address 0x48 to 0x4F. It can be printed at the current cursor position by sending the command 1 to the LCD module.
Generating custom charactersIt’s fairly easy to create a custom character. Simply determine the pixel map of the character and, then, determine the bytes that should be written to the CGRAM to generate that character/icon. For a 16×2 LCD, which has 5×8 dots characters, the top three MSB for each byte can be ignored. The top three MSBs can be set to 0 in each byte while other bits can be set to 0 or 1, according to the pixels that should turn off or on.
Generating custom charactersTo create custom characters, typically the LCD command must first be set and the CGRAM address needs to be passed. Next, the LCD command to write data to the CGRAM needs to be passed.
When using Arduino, it’s even simpler to create a custom character/icon. The LiquidCrystal library on the Arduino platform has a function createChar() that creates custom characters and icons on an LCD. This function takes the position of the custom character and an array of bytes as an argument. The generated custom character can be flashed on an LCD at the current cursor position by using the write() or print() function.
The createChar() mskethodThe createChar() function creates a custom character/icon for use on an LCD. Essentially, it writes a user-defined character pattern (a pixel map of the character) to a given CGRAM address.
The position of the character is specified as a number. For example, in the case of 16×2 LCD, 8 custom characters can be defined and their position can be 0 to 7.
The write() methodThe write() function writes a character on an LCD. The character is written (displayed) at the current cursor position and the cursor is moved right or left according to the direction of text on LCD.
If the data passed is a string (quoted in double or single quotes) of ASCII characters, it is written as such. If it’s a number, the character corresponding to that position in the CGRAM is written on the LCD.
The print() methodThe print() method is used to print text to an LCD. If a custom character has to be written on the LCD using the print() method, then the char() function (with the position of the custom character as the argument), must be passed as the argument of the print() function.
Components required1. Arduino UNO x12. A 16×2 character LCD x13. A 10K Pot x14. A 330-Ohms Resistor or any low-value resistor x15. Breadboard x16. Male-to-Male Jumper Wires or Connecting Wires
Circuit connectionsThe LCD module used in this project is JHD162A. This is a 16×2 LCD module with 5×8 character dots. The LCD module has a 16-pin interface. The LCD is interfaced withArduinoin a 4-bit mode.
The LCD module is connected with Arduino in 4-bit mode. The LCD is first initialized and the display is cleared to get rid of any garbage values in the DDRAM.
The patterns for 16 different custom characters are then generated by defining their pixel maps as arrays. Eight of these custom characters can be displayed on the LCD at one time. This is because 64 bytes of the CGRAM of the 16×2 LCD can store a pattern for only 8 characters at any time.
The 8 custom characters are generated by defining their character maps. The cursor position on the LCD is set from column 0 of line 0 to column 7 of line 0, and each character is displayed one by one. Then, the next 8 custom characters are generated and they’re displayed on line 0 of the LCD at the cursor positions from columns 0 to 7.
In the loop() function, the first 8 custom characters are generated using the customChar() method. The cursor position is set by using the setCursor() method. Each character is printed on the LCD by using the print() method at the cursor positions of column 0 to 7 of line 0, one after the other.
After the printing of the 8 characters, a two-second delay is provided using the delay() function. Then, the LCD is cleared by using the clear() method.
Similarly, the next set of 8 custom characters is generated and printed on line 0 of the LCD. It should be noted that we have created and displayed custom characters in the loop() function. So, if the power supply to the LCD module is interrupted for any reason, the custom characters will regenerate and reprint on the LCD.
If we would have generated the custom characters in the setup() function, that code would have only run once. In that case, if the power supply to the LCD module was somehow interrupted, the character pattern for the custom characters would have been lost and garbage values would have displayed on the LCD.
Additionally, we are printing more than 8 custom characters on the LCD even though only 8 custom characters can be generated and printed. This is another reason that we generated the custom characters in the loop() function.
Do it yourselfIn this recipe, you learned to generate custom characters and print them on a 16×2 character LCD. Now think of other possible custom characters and icons, draw their pixel maps (in 5×8 dots), and determine the bytes that should be written to the CGRAM to generate them.
You can modify the above Arduino sketch to print custom characters and icons. You can also try generating character patterns for your regional language or types of common icons — such as a battery status, Wi-Fi, smiley, or other glyphs. Do so until you are limited by the 5×8 dots matrix!
Bought this from Robotshop retailer. Worked right away like a charm. I even changed splash screen to display my software version. However at some point it stopped displaying text, then backlight started spontaneously switching off several seconds after powering on. I connected LCD to different device and started experimenting just sending one command at a time.
My only complaint with this product is the difficulty in mounting. Finally had to drill out the holes to accept 4-40 standoffs. The Eagle files don"t include the complete board so making a screw hole template from the PCB is impossible. Otherwise works fine with my stand alone Atmega 328P using the SerLCD.h and SoftwareSerial.h libraries.
Does anybody know how to do a hard reset on this LCD? While I was uploading my code, I left it plugged into TX, and it doesn"t work anymore. I"m realizing that it probably got spammed with commands and the configuration got messed up. Does anybody know how to reset to factory defaults?
I have the same question. I now have the 3.3v serial enabled LCD (with backpack) and want to use this one for future usage. VDD of 5V can be supplied, but will the TTL work when its getting 3.3V signals from the TX from Netduino?
I"ve put together some python code for sending serial data to these LCD screens. In particular, the code pulls my twitter status and writes it to the LCD. To work with the extra characters, I wrote functions to page the text (vertical scroll) or scroll the text (horizontal scroll). Details are available here: http://dawes.wordpress.com/2009/12/23/twitter-to-lcd/
I spent more time today trying to use this to help in debugging an Arduino, than if I would have just soldered on a JTAG connector, installed linux, and used that.
Is it possible to wire this up in parrellel rather than use the serial function? I ran into a snag and am unable to use the serial function of this lcd? I see the pinouts on the schematic but when wired it doesn"t seem to work.
I"ve created a new splash screen for the Serial LCD, now I want to save it to the Serial LCD memory. So, exactly how do I write a "control-j" to the Serial LCD. I"ve put in the required line to transmit special character 124, but I can figure out how to format the "control-j" line of code. I"ve Googled this for about an hour and can"t find an explanation or sample code anywhere. Here"s my code...void setup() {
I"m not sure if you"re referring to comments on the website, or on your LCD screen. You can contact techsupport@ and they"ll be able to assist you further.
I have used a Labview program for this LCD. When i send character "a", the display is "0". Does anyone having a same problem. How should I troubleshoot this problem.Tq
Has anyone managed to get the PWM backlighting working with an Arduino? I"m trying variations of this and nothing works except the standard On/Off commands using 0xFE as the escape. All my attempts turn the display off but the backlight LED is on full.
Why do I get power out of the VDD port with only RX and GND hooked up? I have a 5V rail that I use to power everything on my board - and when I added this SerLCD I now have a bridge between the arduino power and my 5v line ... which I dont want. Can I add a diode to the VDD to stop reverse voltage from powering my board?
It seems like the MCLR function has been disabled through the config bits. No pullup to Vdd is installed. This makes it really irritating to work with this display. Programming an arduino with this hooked the HW serial port will screw up the display, and without the reset line you have to pull power. A simple solution would just be to wire the PICs MCLR pin to the Arduinos reset line, but this isn"t possible without the MCLR function obviously.
I"m using usb->rs232 adapter for data and an open wire usb cable for power and am getting garbage on all baud rates using code and putty. Am I doing something wrong?
Quick suggestion... It"d be very helpful for some people if you guys added a note in the description pointing people to the correct 3-pin JST jumper wire to be used with these serial LCDs. Two reasons... it"s not clear that the jumper is not included, and you have 3-pin jumpers in your catalog which don"t work with this serial LCD.
I have ported LiquidCrystal library for use with the serial LCD you can look at my code here. Still working on finishing all the documentation. But putting up for now hopefully someone will find it usefull.
I"m also having the same problem after accidentally sending the control character "|" followed by "\", "-", "/" to the LCD as I was trying to animate a rotating bar to indicate a busy status.
The baud rate problem can be solved by writing at 9600, at startup, a "change baud rate" command to the target rate. At worst, the display is already at the target rate and will misinterpret the command and display garbage, at best, it will be set to the right baud rate.
Having ordered this exact LCD myself, I can say that aside from the issue mentioned in my other comment, it looks exactly like the picture. No bulky backpack module, everything is on a single board. Pretty sleek, really.
I used a few of these in my IRcombat laser tag game with my arduino duemiloves and love them. I also used the Red and Black. I like the white and black better outdoors and the red/black indoors. I just wish I could figure out how to send the reset code to them. I know how to clear and change brightness in code, but the ctrl+ command boggles my mind. A few of them have to be unplugged and plugged back in to work after power on because of this issue. Not worth replacing them yet.
Hi...noob question. how do i send data on the fly via arduino? it only has 1 connection to tx. i tried using the serial monitor to send something, but it doesnt work...im looking for something which i guess is similar to liquidCrystal->SerialDisplay example.
I received mine just yesterday and hooked it up. It definitely works, but it occasionally "wigs out" in various ways. I set my own splash screen, which worked fine the first couple of times. The third time I powered it on I got a screen with one line of white blocks and one blank line. It has lost the baud rate setting on me several times. Sometimes I get reverse video garbage characters for some reason.
Edit: Got mine fixed. If you checked the soldering on all the terminals, check them again. I also sometimes was getting strings of garbage if I wriggled the terminals on the LCD (I suspect because I was getting a partial connection on the bad terminal). Resoldered and it is working fine now.
Wait, so I get the 3 pins for power and control, but whats with all the other pins on the sides? Can it be used to control another LCD besides the one built in?
The other pins are used if you want to control the LCD without using the serial standard. There"s some tutorials on how to do that with the arduino below. You have more control over what you can do with it, but it takes up more pins on the arduino. If you want to wire it up this way, don"t spend the money on the serial interface, they have cheaper LCD"s that allow you to do it this way, without the serial.
I"m pretty new to the Arduino scene, so I"m still amazed at how much capability is baked into these little breakout boards (thanks to a lot of great library code that comes with it). This thing is so easy to use, and the refresh rate is so fast! I never thought it would be this easy to add fairly rich displays to my project, and it"s so much more satisfying than a few blinking lights or 7-segment displays. My only issue with it was trying to hook it up to a 5v board (with the 3.3v supply and level adjusters, of course). I never got it to display anything but garbage, and I suspect the SPI clock and/or data lines were not clean enough after passing through the level adjusters. I gave up on the 5v board and switched to a 3.3v Arduino Pro, got rid of the level adjusters, and then the display worked like a dream. Highly recommended!
The LCD seems to be fine for the most part, but this breakout board is really substandard. The bend radius of the FPC is too small and really awkward. I know they were trying to make it small, but the layout and size of this board was ill-conceived. I now have two because the first one stopped working intermittently. The second has begun behaving the same way and it"s definitely related to the FPC after several hours of debug effort.
We built one of these into a 1" x 1" x 0.5" 3D-printed enclosure along with an Arduino 328P microcontroller, ADXL345 accelerometer, FTDI USB interface chip, battery, charger, LDO and on-off switch. There"s a picture at potomacmeso.com/display-with-accel. The combination of display and tap-sensitive accelerometer gives some interesting alternatives for 2-way communication between the user and the microcontroller. The display is easy to program, thanks to the libraries.
Tried it out with Teensy 3.2 installed on SparkFun Teensy Arduino shield board. This OLED display works great. The Teensy 3.2 is so fast that I had to add some delay statement in order to actually see the different display patterns.
This screen is awesome and the demo software is pretty sweet. Make sure you include solder wick with your order if you dont already have some. swapping those jumpers without it is difficult and potentially fatal. Otherwise this thing is awesome! Make sure not to power your Arduino until everything is connected otherwise the screen will miss the initial line of code and not work. Also, I didn"t solder headers to the parallel pads as recommended, but make sure you at least rest the otherside of the board on some while soldering. That way your headers will be square and not cocked to one side.
A bright and crisp OLED display. Despite it"s small size even 5x7-font-text is very readable. SPI transfer allows for a quite fast update rate of the whole display. Although there"s "only" an Arduino library available from Sparkfun and i"m using mbed boards and IDE, it was very easy to adapt the library for use with mbed platforms. Here is the link to the SFE_MicroOLED library for mbed:
The driver seems well-designed, is automatically double-buffered for clean drawing, and has a good basic set of drawing primitives built in. On the limited space of, say, an Arduino Pro Mini, this library uses up a fairly large percentage of program & global memory, I actually stripped some of the code that I didn"t need out, though it probably won"t have been necessary to do so by the end of the project.
Ms.Josey 
Ms.Josey