I am trying to communicate with my EC stamp. Here is the datasheet:
https://www.atlas-scientific.com/_files/_datasheets/_circuit/EC_Circuit_3.0.pdf
https://www.atlas-scientific.com/_files/instructions/ec_Wiringdiagram.pdf
So now I have it wired correctly (I believe), I am using pins 10 and 11 for tx and rx respectively and have wired the stamps rx to tx and tx to rx.
I am using the code below:
/*
This software was made to demonstrate how to quickly get your Atlas Scientific product running on the Arduino platform.
An Arduino Duemilanove board was used to test this code.
This code was written in the Arudino 1.0 IDE
Modify the code to fit your system.
Code efficacy was NOT considered, this is a demo only.
The soft serial port TX line goes to the RX pin.
The soft serial port RX line goes to the TX pin.
Make sure you also connect to power and GND pins to power and a common ground.
Data is received and re-sent through the Arduinos hardware UART TX line.
Open TOOLS > serial monitor, set the serial monitor to the correct serial port and set the baud rate to 38400.
Remember, select carriage return from the drop down menu next to the baud rate selection; not "both NL & CR".
The data from the Atlas Scientific product will come out on the serial monitor.
Type in a command in the serial monitor and the Atlas Scientific product will respond.
*/
#include <SoftwareSerial.h> //add the soft serial libray
#define rxpin 11 //set the RX pin to pin 2
#define txpin 10 //set the TX pin to pin 3
SoftwareSerial myserial(rxpin, txpin); //enable the soft serial port
String inputstring = ""; //a string to hold incoming data from the PC
String sensorstring = ""; //a string to hold the data from the Atlas Scientific product
boolean input_stringcomplete = false; //have we received all the data from the PC
boolean sensor_stringcomplete = false; //have we received all the data from the Atlas Scientific product
void setup(){ //set up the hardware
Serial.begin(38400); //set baud rate for the hardware serial port to 38400
myserial.begin(38400); //set baud rate for software serial port to 38400
//Serial.println("hello world");
inputstring.reserve(5); //set aside some bytes for receiving data from the PC
sensorstring.reserve(30); //set aside some bytes for receiving data from Atlas Scientific product
}
void serialEvent() { //if the hardware serial port receives a char
char inchar = (char)Serial.read(); //get the char we just received
inputstring += inchar; //add it to the inputString
if(inchar == '\r') {input_stringcomplete = true;} //if the incoming character is a <CR>, set the flag
}
void loop(){ //here we go....
if (input_stringcomplete){ //if a string from the PC has been recived in its entierty
myserial.print(inputstring); //send that string to the Atlas Scientific product
inputstring = ""; //clear the string:
input_stringcomplete = false; //reset the flage used to tell if we have recived a completed string from the PC
}
while (myserial.available()) { //while a char is holding in the serial buffer
char inchar = (char)myserial.read(); //get the new char
sensorstring += inchar; //add it to the sensorString
if (inchar == '\r') {sensor_stringcomplete = true;} //if the incoming character is a <CR>, set the flag
}
if (sensor_stringcomplete){ //if a string from the Atlas Scientific product has been received in its entirety
Serial.print(sensorstring); //use the hardware serial port to send that data to the PC
sensorstring = ""; //clear the string:
sensor_stringcomplete = false; //reset the flag used to tell if we have received a completed string from the Atlas Scientific product
}
}
As soon as I start I get this streaming in the serial monitor:
!¥Á!eÁ!¥Áç¥Á1%Ó!¥Á!%Á!¥Á!¥Á
Using the command L0 doesn't seem to turn off any LED's on the stamp.
I have an I2C LCD shield with buttons ontop of my arduino on stacking headers, but the I2C shouldn't interfere with the serial anyway? I also had an RTC module sharing I2C on pins 0 and 1 (I think) which I have since removed with the same random garbage output in serial.
so I changed all to 38400.