FYI, you can also check my Open Source Voltage logger and Pressure & Temperature Logger projects that run on on my Scorpion Board. It uses log_fs a simple, but robust record-based file system for AT45D DataFlash that I'm quite proud of.

I was experiencing the same problems as "I Dream of JNE" when using both the UNO and Duemilanove Arduino boards. To fix the problem, I used the AltSoftSerial library in place of the SoftwareSerial library. The ENV-32X now receives commands reliably and returns the correct data. AltSoftSerial library and details are available here:

http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html

For anyone having problems similar to “I Dream of JNE”: I found using the Arduino Uno was the problem. Switched to the Mega2560 and used serial3 for communications and the following code: (Ps use carriage return on serial monitor and if the led on the ENV-32X is not green send it a line ie. "M" and use 3.3V)

//Test Code for ENV-32X by MDW (30-12-2013) using Atlas Scientific code as ref.

boolean WriteBufferCheck = false;

boolean ReadBufferCheck = false;

String WriteBuffer;

String ReadBuffer;

void setup()

{

Serial.begin(38400);

Serial3.begin(38400);

}

void loop()

{

while ((WriteBufferCheck == false) && (ReadBufferCheck == false)){

if (Serial3.available()){

  char outchar = (char)Serial3.read();

  ReadBuffer += outchar;

  if(outchar == '\r') {

  ReadBufferCheck = true;

  }

}

if (Serial.available()){

  char inchar = (char)Serial.read();

  WriteBuffer += inchar;

  if(inchar == '\r') {

  WriteBufferCheck = true;

  }

}

}

if (ReadBufferCheck == true){

Serial.print(ReadBuffer);

Serial.println();

ReadBuffer = "";

ReadBufferCheck = false;

}

if (WriteBufferCheck == true){

Serial3.print(WriteBuffer);

WriteBuffer = "";

WriteBufferCheck = false;

}

}

I am completely new to Arduino, and I am having a hard time following the example on the AtlasScientific website. I have everything setup as they have in the example with the voltage correction (3.3V), and I using the code provided. I am trying to write data to the data logger using the serial monitor of the Arduino software. Nevertheless, I don't get the Y or N you are suppose to get, nor I can verify whether it has actually save some data since whenever I send a command I don't receive anything back. I have tried all the possible combinations for the correct string command but still nothing. Any suggestions, or examples on how to pass commands to the data logger?

Thanks!!

It seems like my Env-32x is not storing data. I've checked the connections and the power is 3.3V on an Arduino Mega. The input to and output from the Env-32x appears below. Is the memory bad? Are there other causes? Thanks....Tim

sent to env M //Sent M to Env

32765,4128384,65531 //Received this string from Env

sent to env D

sent to env D

X //This indicates that it should have deleted all data, but it didn't

sent to env M

32765,4128384,65531

sent to env *12345678 //Send some data to the env

Y

sent to env *12345678

Y

sent to env R1 //See what's stored in the memory (looks like garbage)

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The one I have garbles the data. It only occasionally responds to a command, as if the bit rate isn't correct, but although that would explain the garbled text I haven't been able to find a baud rate (other than 38400) that works. I only get garbled data back out, and I have to send every command several times before it "sticks".

I should add that it is still storing the data and trying to read it back out, but it messes it up. For example: Store "This is a sentence. 12345" and it will return something like: "}♦is is %^&ence. 1ss45" so I can see that the data is sort of in there. Upon repeated readouts it eventually has every character in the right place, but never all at once, so there's clearly something wrong with readout, not with read-in (except for the problem receiving commands) or storage.

It states in the specs 3.6v Max for VCC, but in the sample code pages provided for the Arduino and Mega they have it hooked up to the 5V pin on the Arduino. Am I missing something?

Anyone know the power draw on this device?

Guys, 0 – VCC is not a valid RS-232 serial level. If you connected this to a proper RS-232 port, it would not work. Please correct this in the spec as it is misleading and some people would take it to mean you can connect it to a PC or something similar directly.

RS-232 specifies that the voltage must swing between a negative voltage and a positive voltage to represent logical 0’s and 1’s. The minimum swing normally accepted for this is from -5V to +5v with anything in between being ignored (i.e. 0V).

I believe the memory chip can be purchased here: http://www.digikey.com/product-detail/en/AT45DB321D-SU/AT45DB321D-SU-ND/1886162