Comments: OpenLog Hookup Guide

I tried to compile and load the latest version of the OpenLog code. I got all the libraries located so the Arudino IDE can find them. The compile worked with ver 1.8.12. The upload states: avrdude: stk500_recv(): programmer is not responding The Board is: Arduino Pro or Pro Mini The Processor is: Atmega328p (5V, 16Mhz) Programmer is: ArduinoISP Any suggestions ?

Hi everyone,

trying to use "light" firmware on an OpenLog (a Chinese build) with the 4.0 version, using “Arduino/Genuino Uno” as instructed, I got the usual

avrdude error (stk500_getsync() attempt x of 10: not in sync: resp=0x00)

error. As suggested on http://www.parkansky.com/arduino-error.htm page, I have tried without connecting Rx then Tx pin on the OpenLog (one is obviously needed to upload, but I even tried), without any success.

But using "Arduino Pro or Pro Mini" (5v 16Mhz), with IDE version 1.8.5, it worked, sketch has been successfully uploaded and logging work using the "light" firmware.

Hope this could help, have fun with openLog ;)

I'm trying to record a serial output that is formatted as 8 bit, no parity, 1 stop bit, no flow control. I thought this was the most common set up but when I look at the SD card I get gibberish as if those settings aren't properly set. the config file doesn't seem to allow changing this, any idea what I can do to get this to work?

-------------------- Tech Support Tips/Troubleshooting/Common Issues --------------------

Logic Levels Between OpenLog and a 5V System

The OpenLog uses 3.3V if you look at the hardware specs. We recommend using a logic level converter [ https://www.sparkfun.com/products/12009 ] to convert the logic on the RXI and the GRN (aka DTR) pins. You would not need to connect a logic level converter for TX. The reason why is because the OpenLog will be outputting 3.3V. This should be high enough for the RedBoard to recognize as a logic high [ https://learn.sparkfun.com/tutorials/logic-levels/ttl-logic-levels. Just make sure that pin 3 is not turned HIGH. If you are worried, you can always used another channel on the logic level converter. If you are using a RedBoard, Arduino Uno, or any other 5V system.

Another alternative is to use voltage division [ https://learn.sparkfun.com/tutorials/voltage-dividers ] to connect the OpenLog to a 5V system. If you are using voltage division, applying the voltage divider on the RXI and GRN pins. You could use 3x 10kOhm resistors similar to the "Uni-Directional" application circuit on our old logic level converter to send data to the receive pin.

Tested Arduino IDE Versions

The firmware and example sketches seem to compile and upload fine with no issues when using it with Arduino IDE v.1.8.3, v1.8.5, and v1.8.8. I was testing this using Windows 10, 64-bit OS.

Compile Errors

If you are compiling and receive an an error similar to:

prog_char typedef is undefinied

The compile error seems to be an isolated issue. It might be due to your environment variables, OS settings, and the way that the Arduino IDE was installed causing the computer to find certain files. A user was able to work around the issue and compile the OpenLog_Minimal.ino sketch in Arduino IDE v1.8.3 by including this at the top of the SerialPort.h file included in the zipped OpenLog Firmware Bundle:

#include 
typedef char PROGMEM prog_char;
#if ARDUINO < 100

It's possible that the Arduino IDE was not installed correctly or the version that is being used has bugs. You may want to:

• uninstall and reinstall the Arduino IDE
• roll back to a different Arduino IDE version

Where are the example sketches located?