OLIMEXINO-85
Arduino-compatible board

USER’S MANUAL
Document revision D, July 2015
Designed by OLIMEX Ltd, 2013

All boards produced by Olimex LTD are ROHS compliant

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OLIMEXINO-85 user's manual

DISCLAIMER© 2015 Olimex Ltd. Olimex®, logo and combinations thereof, are registered trademarks of Olimex Ltd. Other productnames may be trademarks of others and the rights belong to their respective owners.
The information in this document is provided in connection with Olimex products. No license, express or impliedor otherwise, to any intellectual property right is granted by this document or in connection with the sale of
Olimex products.
This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License. To view a copy ofthis license, visit http://www.creativecommons.org/licenses/by-sa/3.0/.

This hardware design by Olimex LTD is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported
License.
The software developed by Olimex LTD is released under GPL. The software developed by Micronucleus, Little Wireand Digispark is released under their respective licenses.
It is possible that the pictures in this manual differ from the latest revision of the board.
The product described in this document is subject to continuous development and improvements. All particulars of the
product and its use contained in this document are given by OLIMEX in good faith. However all warranties implied or
expressed including but not limited to implied warranties of merchantability or fitness for purpose are excluded. This
document is intended only to assist the reader in the use of the product. OLIMEX Ltd. shall not be liable for any loss ordamage arising from the use of any information in this document or any error or omission in such information or any
incorrect use of the product.
This evaluation board/kit is intended for use for engineering development, demonstration, or evaluation purposes only
and is not considered by OLIMEX to be a finished end-product fit for general consumer use. Persons handling the
product must have electronics training and observe good engineering practice standards. As such, the goods being
provided are not intended to be complete in terms of required design-, marketing-, and/or manufacturing-related
protective considerations, including product safety and environmental measures typically found in end products thatincorporate such semiconductor components or circuit boards.
Olimex currently deals with a variety of customers for products, and therefore our arrangement with the user is not
exclusive. Olimex assumes no liability for applications assistance, customer product design, software performance, or
infringement of patents or services described herein.

THERE IS NO WARRANTY FOR THE DESIGN MATERIALS AND THE COMPONENTS
USED TO CREATE OLIMEXINO-85. THEY ARE CONSIDERED SUITABLE ONLY FOR
OLIMEXINO-85.
THE HARDWARE DESIGN OF OLIMEXINO-85 IS INFLUENCED HEAVILY BY THE
ORIGINAL DESIGNS OF LITTLE WIRE PROJECT AND DIGISTUMP'S DIGIPARKBOARD. THE HARDWARE DESIGN IS ALSO INSPIRED BY ALL OTHER ATTINY85
BOOTLOADER PROJECTS RELEASED PREVIOUSLY.
THE FIRMWARE USES THE VID/PID COUPLE DONATED BY DIGISTUMP TO THE
COMMUNITY. OLIMEXINO-85 WOULD NOT HAVE BEEN POSSIBLE WITHOUT THE
EXISTENCE OF MICRONUCLEUS AND DIGISPARK PROJECTS.
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Table of Contents
DISCLAIMER............................................................................................................. 2
CHAPTER 1: OVERVIEW........................................................................................5
1. Introduction to the chapter.......................................................................................................5
1.1 Features.....................................................................................................................................5
1.2 Target market and purpose of the board...............................................................................5
1.3 Board variants..........................................................................................................................6
1.4 Board version used in the manual..........................................................................................6
1.5 Organization.............................................................................................................................6

CHAPTER 2: SETTING UP THE OLIMEXINO-85 BOARD...............................8
2. Introduction to the chapter.......................................................................................................8
2.1 Electrostatic warning...............................................................................................................8
2.2 Requirements........................................................................................................................... 8
2.3 Powering the board..................................................................................................................9
2.4 Connecting to the Arduino IDE..............................................................................................9
2.5 Examples and libraries tested by OLIMEX..........................................................................9
2.6 Reprogramming the ATtiny85..............................................................................................10

CHAPTER 3: OLIMEXINO-85 BOARD DESCRIPTION...................................11
3. Introduction to the chapter..................................................................................................... 11
3.1 Layout (top view)................................................................................................................... 11
3.2 Layout (bottom view).............................................................................................................12

CHAPTER 4: ATMEL AVR ATTINY85................................................................. 13
4. Introduction to the chapter.....................................................................................................13
4.1 The microcontroller...............................................................................................................13
4.2 Serial programming of the microcontroller........................................................................ 14

CHAPTER 5: CONNECTORS AND PINOUT......................................................16
5. Introduction to the chapter.....................................................................................................16
5.1 USB connector........................................................................................................................16
5.2 GPIO connector..................................................................................................................... 16
5.3 Jumper description................................................................................................................17
5.4 Additional hardware components........................................................................................ 17

CHAPTER 6: SCHEMATICS..................................................................................18
6. Introduction to the chapter.....................................................................................................18
6.1 Eagle schematic......................................................................................................................18
6.2 Physical dimensions...............................................................................................................20

CHAPTER 7: REVISION HISTORY AND SUPPORT........................................ 21
7. Introduction to the chapter.....................................................................................................21
7.1 Document revision................................................................................................................. 21
7.2 Board revision........................................................................................................................ 21
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7.3 Useful web links and purchase codes...................................................................................22
7.4 Product support..................................................................................................................... 23

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CHAPTER 1: OVERVIEW
1. Introduction to the chapter
Thank you for choosing the OLIMEXINO-85 from Olimex! This document provides a user’s guidefor OLIMEXINO-85. As an overview, this chapter gives the scope of this document and lists theboard’s features. The document’s organization is then detailed.
The OLIMEXINO-85 development board enables code development of applications running on the
AVR ATtiny85 microcontroller, manufactured by Atmel Corporation, USA.
OLIMEXINO-85 is an open-source, open-hardware project and all documentation is available tothe customer.

1.1 Features
The board has the following set of features (note about the difference between the two versions of
the board):
ATtiny85-PU microcontroller with pre-loaded "micronucleus tiny85" bootloader
Programmed via the USB type B connector
Tested and working with Digisparks's Arduino distribution
Breadbord compatible via the header
Two LEDs – user-programmable and power status
Reset button
All components already soldered (unlike the DIY version)
Easy-to-replace components in case of fault
Open-hardware board, board schematics and layout available for Eagle
Open-software board, thanks to the Digispark's community effort and the micronucleus
project• Dimensions - (1.275×0.800)'' ~ (32×20)mm
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1.2 Target market and purpose of the board
All boards in the OLIMEXINO family feature a built-in bootloader (for serial programming without
special tools). The main usage of the boards is software embedded development without the urge ofunderstanding perfectly the hardware using Arduino or Arduino-derived IDE.
The strong points of the OLIMEXINO-85 are: the tiny form factor, the small consumption, the factthat you can program it without special programmer via the USB cable.
Customers have full access to the technical documentation of the board. The software is released
under General Purpose License and the board is considered open-hardware – all schematics andboard design files are available to the customer under the Creative Commons AttributionShareAlike 3.0 Unported License.

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1.3 Board variants
There are two major board variants named: OLIMEXINO-85-ASM and OLIMEXINO-85-KIT. The
difference between the two versions is that the KIT one comes with no components soldered. The
already soldered version is called ASM (short from “assembled”).
It is possible that the board or the kit you own has either mini USB connector or USB type B,
connector. This might alter the recommended cable. Initially, we used to mount mini USB connector
since we believed most people already have some sort of mini USB cable which would reduce theend cost for the customer. However, the mini USB was much harder to place and solder than therest of the components and many customers found it frustrating. We decided to place USB type B
for newer revisions which is much easier to solder.
This document is suitable for both boards. However, for more precise soldering instructions(regarding the KIT variant) it is recommended to refer to the soldering guide, which is a stand-alone
document and might be downloaded from the KIT's web page.
Other similar boards manufactured by Olimex:
OLIMEXINO-85BC - a board similar to OLIMEXINO-85-ASM that has a battery connector andbattery charger; uses mini USB connector
OLIMEXINO-85S – the smallest ATTiny85 board that we manufacture - (0.665×0.500) inch, uses
micro USB connector and can be powered by a battery
SIMON-85 – an implementation of the SIMON game to test your memory skill
SIMON-85-KIT – same as above but available as kit to solder yourself
FOSDEM-85 – a kit for soldering with penguin shape, can be attached to a key chain

1.4 Board version used in the manual
Hardware revision B boards and resources were used while writing this document. It is possible thatthey are outdated so it is always recommended to refer to the stand-alone schematics available atour web-site.
The hardware revision of your OLIMEXINO-85 is printed on the top under the name of the board.

1.5 Organization
Each section in this document covers a separate topic, organized as follows:– Chapter 1 is an overview of the board usage and features– Chapter 2 provides a guide for quickly setting up the board and software notes– Chapter 3 outlines the main parts of the OLIMEXINO-85– Chapter 4 describes the component that is the heart of the board – the ATtiny85 and explains
the needed connections for external programming via a compatible tool
– Chapter 5 covers the connector pinout, peripherals and jumper description
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OLIMEXINO-85 user's manual– Chapter 6 provides the schematics and the dimensions of the board– Chapter 7 contains the revision history, useful links and support information

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CHAPTER 2: SETTING UP THE OLIMEXINO-85 BOARD
2. Introduction to the chapter
This section helps you set up the OLIMEXINO-85 development board for the first time. Pleaseconsider first the electrostatic warning to avoid damaging the board, then discover the hardware andsoftware required to operate the board.
The procedure to power up the board is given, and a description of the default board behavior isdetailed.

2.1 Electrostatic warning
OLIMEXINO-85 is shipped in a protective anti-static package. The board should not get exposed tohigh electrostatic potentials. A grounding strap or similar protective device should be worn whenhandling the board. Avoid touching the component pins or any other metallic element without sucha strap.

2.2 Requirements
In order to set up the OLIMEXINO-85 optimally one or more additional items may be used. They
might be generally placed in two categories:
Required – items that are needed in order to achieve minimum functionality;
Recommended – items that are good to have in order to be able to interact with the most importantof the features of the board;
Required items:- USB type A to USB type B – to connect to a personal computer; used for powering the board anduploading new programs (note that older revisions of the board might have only USB miniconnector – if that is the case you would need USB mini cable)
Recommended items:- Breadboard – for solderless access to GPIO and VCC/GND pins via jumper wires- Jumper wires – wires for easier interfacing of different pins
- AVR-compatible programmer – to restore the bootloader program in case you erease it- External power supply unit – 3.6V DC for stand-alone power (no mini USB)
Some of the above-suggested items can be purchased from Olimex, for instance:
USB-A-B-CABLE or USB-MINI-CABLE – standard cables depending on the connector
BREADBOARD-1 – with 0.1' step that allows easy plugging of the OLIMEXINO-85
JUMPER-WIRES – wires with male and/or female connectors for use with breadboards
AVR-ISP500 – compatible programmer with 6-pin and 10-pin ICSP connectors
AVR-ISP-MK2 – compatible programmer with 10-pin ICSP connector
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2.3 Powering the board
The usual way to power OLIMEXINO-85 would be to connect it to your computer via USB cable.
The OLIMEXINO-85 has a USB type B connector (or mini USB connector, older revisions havethe smaller one) mounted so make sure your cable is suitable.
The other way to power OLIMEXINO-85 – supply 2.7VDC to 5VDC to the VCC pin of the header.
Connect the supply's ground pin to the board's GND pin.

2.4 Connecting to the Arduino IDE
The ATtiny85 microcontroller of the OLIMEXINO-85 comes pre-programmed with a bootloader
firmware. This firmware allows it to act as a USB device and new software can be uploaded by via
a USB cable by a modified version of the Arduino IDE.
The OLIMEXINO-85 runs the “Micronucleus” bootloader, an open source community project. The
project repository can be found here: https://github.com/micronucleus/micronucleus
This bootloader is also used by the Digispark board – the board that inspired OLIMEXINO-85.
OLIMEXINO-85 uses the VID/PID pair that the creator of the Digispark – Digistump donated tothe community.
For complete and latest instructions on how to use connect to Arduino IDE please visit:

http://digistump.com/wiki/digispark/tutorials/connecting
There are also good instructions on how to select the proper board so you can upload programs. It is
important that due to the small size of OLIMEXINO-85 it has a specific set of settings and a special
algorithm of uploading.
OLIMEXINO-85 is recognized as the default board that is selected by default after the installationof the Digistump support in the Arduino “Board Manager”. That is “Digispark (Default – 16.5mhz)”
under “Tools → Board”
When you have a program ready to upload you need to disconnect the board from the mini USB!
Then press the upload button in the Arduino IDE interface and you will be asked to connect theboard in the next 60 seconds. After you connect the OLIMEXINO-85 don't press anything and just
wait until the code is uploaded!

2.5 Examples and libraries tested by OLIMEX
There are number of examples that show different applications of OLIMEXINO-85. They might bedownloaded from the software section of the OLIMEXINO-85's own web-page here:
https://www.olimex.com/Products/Duino/AVR/OLIMEXINO-85-ASM.

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2.6 Reprogramming the ATtiny85
During your work you might accidentally delete the bootloader on the microcontroller or evenworse – you might burn the ATtiny85 microcontroller.
In both cases you would need to download the default bootloader to ATtiny85 to be able to connect
and program via the Digispark's Arduino.
Since the OLIMEXINO-85 lacks the required interface you would need jumper wires or your own
external socket suitable for the task. You might find a table with correct connections and operations
required to do in chapter 4.2 of this user's manual.
The binaries with the bootloader are found in the demo archive that might be downloaded from
OLIMEXINO-85's web-page. The hex and elf sources are placed in the “OLIMEXINO85_firmware” folder.
When you get the files and fix the connections you would need a tool able to upload the bootloader
to the ATtiny85 target via your programmer. There are two main software environments used:
1) Use AVR/Atmel Studio or AVRDude to upload respectively the .elf or the .hex to the target
ATtiny85.
The .elf file contains the proper fuses and configuration bits. You have to set them manually if you
use the .hex file.
Extended fuse should be: 0xFE – this value enables self programming and keeps the serial
programming enabledHigh fuse should be: 0xDD – this values sets PLL Clock; start-up time PWRDWN/RESET: 1K
CK/14 CK + 64 ms
Low fuse should be: 0xE1 – this values sets brown-out detection at VCC=2.7 V
2) If you use AVRDude then you need to pass the fuse settings as command line:
lfuse:w:0xE1:m -U hfuse:w:0xDD:m -U efuse:w:0xFE:m
Usually the command to program the board via AVRDude looks like:
avrdude -c stk500v2 -P com26 -p t85 -U flash:w:Olimexino-85_ProductionTest_v_1_0_0.hex -U
lfuse:w:0xE1:m -U hfuse:w:0xDD:m -U efuse:w:0xFE:m,wherestk500v2 is the programmer's interface abbreviation as per AVRdude's documentation
t85 is the abriviation of the name of the target microcontroller as per AVRdude's documentation
Olimexino-85_ProductionTest_v_2_0_1.hex is the name of our binary code.

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CHAPTER 3: OLIMEXINO-85 BOARD DESCRIPTION
3. Introduction to the chapter
Here you get acquainted with the main parts of the board. Note the names used on the board might
differ from the names used below to describe them. For the actual names check the OLIMEXINO85-ASM board itself.

3.1 Layout (top view)
The picture below shows top layout of the initial revision of OLIMEXINO-85-ASM.

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3.2 Layout (bottom view)
The bottom of the board doesn't contain any active or passive elements. It is the place where mostsoldering is done and you should be careful for the surface you place the board on, to avoid
accidental short-circuits.

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CHAPTER 4: ATMEL AVR ATTINY85
4. Introduction to the chapter
In this chapter is located the information about the heart of OLIMEXINO-85 – its microcontroller.
The information is a modified version of the datasheet provided by its manufacturers.

4.1 The microcontroller
The list of features for ATtiny85 is listed below:
 High Performance, Low Power AVR® 8-Bit Microcontroller Advanced RISC Architecture 120 Powerful Instructions – Most Single Clock Cycle Execution
 32 x 8 General Purpose Working Registers
 Fully Static Operation
 Non-volatile Program and Data Memories
 2/4/8K Bytes of In-System Programmable Program Memory Flash Endurance: 10,000 Write/Erase Cycles
 128/256/512 Bytes In-System Programmable EEPROM
 Endurance: 100,000 Write/Erase Cycles
 128/256/512 Bytes Internal SRAM
 Programming Lock for Self-Programming Flash Program and EEPROM Data Security
 Peripheral Features
 8-bit Timer/Counter with Prescaler and Two PWM Channels
 8-bit High Speed Timer/Counter with Separate Prescaler 2 High Frequency PWM Outputs with Separate Output Compare Registers
 Programmable Dead Time Generator
 USI – Universal Serial Interface with Start Condition Detector
 10-bit ADC
 4 Single Ended Channels
 2 Differential ADC Channel Pairs with Programmable Gain (1x, 20x)
 Temperature Measurement
 Programmable Watchdog Timer with Separate On-chip Oscillator On-chip Analog Comparator
 Special Microcontroller Features
 debugWIRE On-chip Debug System In-System Programmable via SPI Port External and Internal Interrupt Sources Low Power Idle, ADC Noise Reduction, and Power-down Modes Enhanced Power-on Reset Circuit
 Programmable Brown-out Detection Circuit
 Internal Calibrated Oscillator
 I/O and Packages
 Six Programmable I/O Lines
 8-pin PDIP, 8-pin SOIC, 20-pad QFN/MLF, and 8-pin TSSOP (only ATtiny45/V)
 Operating Voltage
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 1.8 - 5.5V for ATtiny25V/45V/85V
 2.7 - 5.5V for ATtiny25/45/85
 Speed Grade ATtiny25V/45V/85V: 0 – 4 MHz @ 1.8 - 5.5V, 0 - 10 MHz @ 2.7 – 5.5V
 ATtiny25/45/85: 0 – 10 MHz @ 2.7 - 5.5V, 0 - 20 MHz @ 4.5 – 5.5V
 Industrial Temperature Range Low Power Consumption
 Active Mode: 1 MHz, 1.8V: 300 µA
 Power-down Mode: 0.1 µA at 1.8V
More information can be found at Atmel's web site at the following web-address:
http://www.atmel.com/Images/Atmel-2586-AVR-8-bit-Microcontroller-ATtiny25-ATtiny45ATtiny85_Datasheet.pdf

4.2 Serial programming of the microcontroller
The table below details the proper connections needed to establish between ICSP programmer andthe board's microcontroller (ATtiny85) or to the GPIO connector (e.g. you don't need to remove themicrocontroller from its plastic socket, you can lead the proper signals to the GPIO connector of
ATtiny85).
To establish the connection below you would need at least 6 jumper wires (male-female). If youconnect the ICSP programmer tool to the GPIOs ignore the “TINY85” column in the table. If youconnect the ICSP programmer tool to the TINY85 directly (or via a socket) ignore the “GPIOconnector name” column.
Cable connection
6-pin ICSPTINY85GPIO connector name

1

6

1

2

8

VCC

3

7

2

4

5

0

5

1

RST

6

4

GND

How to determine first pin of the above connectors and interfaces – the ICSP programmer shouldhave a mark on the connector for its first pin (or the cable leading to the connector would have a
different color on the side of first pin); the TINY85 has a dot that shows which pin is the first one;the GPIO connector has the names of the pins printed on the top of the board.
If your AVR programmer has only 10-pin ICSP you can convert it to 6-pin ICSP following theschematic below:
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CHAPTER 5: CONNECTORS AND PINOUT
5. Introduction to the chapter
In this chapter are presented the connectors that can be found on the board all together with their
pinout and notes about them. Jumpers functions are described. Notes and info on specificperipherals are presented. Notes regarding the interfaces are given.

5.1 USB connector
The USB is usually used to establish connection with the Digispark Arduino IDE. The user's code istransferred to the board via the USB.
Note that the connection to the IDE is possible only a few seconds after powering the
OLIMEXINO-85. This is because the bootloader code that establishes the connection is active for ashort period of time – after that period the board starts executing user's code.
This means you would need to power down the board every-time before code upload.
The data lines D- and D+ are multiplexed with signals named “3” and “4” of the GPIO connector.
This means you can use 3 and 4 in your code which executes after the bootloader phase. If you haveUSB cable plugged GPIO pins with names “3” and “4” will not work properly.
USB connector
Pin #Signal name

Processor pin

1

POWER

-

2

D-

2

3

D+

3

4

-

-

5

GND

-

The connector case is also grounded.

5.2 GPIO connector
The 8-pin GPIO connector is used to interface additional interfaces with the OLIMEXINO-85. You
can use it to connect buttons, LEDs and additional components. You can use it to control I2C
devices and more.
The connector can provide power and also can be used TO POWER the OLIMEXINO-85. Thereare 3 GPIOs which are always available and 2 GPIOs that become available when the USB is not inuse.

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GPIO-1 connector

Pin # Signal name

Processor pin

1 0

5

2 1

6

3 2

7

4 3

2

5 4

3

6 #RST

1

7 GND

4

8 VCC

8

5.3 Jumper description
The board has no hardware jumpers.

5.4 Additional hardware components
The components below are mounted on OLIMEXINO-85 but are not discussed above. They arelisted here for completeness:
Reset button – used to reset the board
PWR LED – green LED that turns on upon powering the board
STAT LED – programmable general-purpose red LED

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CHAPTER 6: SCHEMATICS
6. Introduction to the chapter
In this chapter is located information about the schematics describing logically and physically
OLIMEXINO-85.

6.1 Eagle schematic
Search-able OLIMEXINO-85 schematics and sources may be found at the device's web page at our
GitHub repository here: https://github.com/OLIMEX/OLIMEXINO85/tree/master/HARDWARE/OLIMEXINO-85-ASM. An image of the schematic might be foundon the next manual page for quicker reference.
Our design software of choice is usually Eagle by Cad Soft version 4.16r2. However, the files
should be compatible with the latest Eagle available. Cad Soft offers a trial version of their softwarethat allows you to inspect schematics and board files (without being able to modify them).
This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/.
If you are looking for a schematic of an older revision of the board and it isn't available at our website you may request it by the support e-mail.

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6.2 Physical dimensions
Note that all dimensions are in inches.

The highest element on the board is capacitor C1 with 0.5 inches of height (includes the PCB
height).

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CHAPTER 7: REVISION HISTORY AND SUPPORT
7. Introduction to the chapter
In this chapter you will find the current and the previous version of the document you are reading.
Also the web-page for your device is listed. Be sure to check it after a purchase for the latest
available updates and examples.

7.1 Document revision

Revision, date

Changes

Modified pageA, 27.11.13

Initial manual releaseAll

B, 31.01.14

Adjusted manual to fit the changesof the USB connector

MultipleC, 02.07.15

Updates regarding the bootloader
usedMultipleD, 07.07.15

Fixed wrongfully suggested fusesettings

Multiple

7.2 Board revision
Remember to check the schematics and the board design files to compare the differences.

Revision

Notable changes

A

Initial release of the board

B

1 USB mini connector was changed to USB type B
2 Added RST_E jumper (in open position by default) instead of
removing the RST pin from the extension.
3 R6(NA) pads are now added to the RST line just in case aresistor is needed

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7.3 Useful web links and purchase codes
The web pages you can visit for more information about your device are:https://www.olimex.com/Products/Duino/AVR/OLIMEXINO-85-ASM/
https://www.olimex.com/Products/Duino/AVR/OLIMEXINO-85-KIT/
A place for general questions, FAQ or friendly talk: https://www.olimex.com/forum/
You may may join our IRC channel #olimex @ freenode.net (http://webchat.freenode.net/?
channels=olimex)
ORDER CODES:OLIMEXINO-85-ASM – the assembled version of OLIMEXINO-85
OLIMEXINO-85-KIT – the kit version of OLIMEXINO-85, you would need to first solder it
together to be able to use it
USB-A-B-CABLE for latest board revisions; USB-MINI-CABLE for board revision A –standard cables to attach the board to a personal computer
How to purchase?
You can purchase directly from our online shop or from any of our distributors. Note that usually it
is faster and cheaper to purchase Olimex products from our distributors. List of confirmed Olimex
LTD distributors and resellers: https://www.olimex.com/Distributors.
Please visit https://www.olimex.com/ for more info.

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7.4 Product support
For product support, hardware information and error reports mail to: support@olimex.com. All
document or hardware feedback is welcome. Note that we are primarily a hardware company andour software support is limited. Please consider reading the paragraph below about the warranty of
Olimex products.
All goods are checked before they are sent out. In the unlikely event that goods are faulty,
they must be returned, to OLIMEX at the address listed on your order invoice.
OLIMEX will not accept goods that have clearly been used more than the amount needed toevaluate their functionality.
If the goods are found to be in working condition, and the lack of functionality is a result oflack of knowledge on the customers part, no refund will be made, but the goods will be returnedto the user at their expense.
All returns must be authorized by an RMA Number. Email support@olimex.com for authorization
number before shipping back any merchandise. Please include your name, phone number and ordernumber in your email request.
Returns for any unaffected development board, programmer, tools, and cables permitted within 7days from the date of receipt of merchandise. After such time, all sales are considered final.
Returns of incorrect ordered items are allowed subject to a 10% restocking fee. What is
unaffected? If you hooked it to power, you affected it. To be clear, this includes items thathave been soldered to, or have had their firmware changed. Because of the nature of the
products we deal with (prototyping electronic tools) we cannot allow returns of items that havebeen programmed, powered up, or otherwise changed post shipment from our warehouse.
All returned merchandise must be in its original mint and clean condition. Returns on damaged,
scratched, programmed, burnt, or otherwise 'played with' merchandise will not be accepted.
All returns must include all the factory accessories which come with the item. This includes
any In-Circuit-Serial-Programming cables, anti-static packing, boxes, etc.
With your return, enclose your PO#. Also include a brief letter of explanation of why themerchandise is being returned and state your request for either a refund or an exchange.
Include the authorization number on this letter, and on the outside of the shipping box.
Please note: It is your responsibility to ensure that returned goods reach us. Please use areliable form of shipping. If we do not receive your package we will not be held liable.
Shipping and handling charges are not refundable. We are not responsible for any shipping
charges of merchandise being returned to us or returning working items to you.

The full text might be found at https://www.olimex.com/wiki/GTC#Warranty for future reference.

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