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Change I2C address working
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‎examples/Example3_Set_Emissivity/Example3_Set_Emissivity.ino

Lines changed: 1 addition & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -65,8 +65,7 @@ void setup()
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while (!Serial.available()) ;
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if (Serial.available()){
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float newEmissivity = 0;
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newEmissivity = Serial.parseFloat();
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float newEmissivity = Serial.parseFloat();
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// Edge-case gaurds
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if (newEmissivity < 0.1)

‎examples/Example4_Change_i2c_Address/Example4_Change_i2c_Address.ino

Lines changed: 174 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,174 @@
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/******************************************************************************
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MLX90614_Set_Address.ino
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Configure an MLX90614 to use a new I2C address.
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This example demonstrates the setAddress function.
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If an MLX90614 is configured for the default address (0x5A),
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it'll change the address to a new address (0x5B).
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If the Arduino can communicate with an MLX90614 on the new
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address, it'll print the device's ID registers.
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Note: for the new address to take effect, you need to cycle
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power to the MLX90614.
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Hardware Hookup (if you're not using the eval board):
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MLX90614 ------------- Arduino
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VDD ------------------ 3.3V
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VSS ------------------ GND
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SDA ------------------ SDA (A4 on older boards)
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SCL ------------------ SCL (A5 on older boards)
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Jim Lindblom @ SparkFun Electronics
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October 23, 2015
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https://github.com/sparkfun/SparkFun_MLX90614_Arduino_Library
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Development environment specifics:
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Arduino 1.6.5
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SparkFun IR Thermometer Evaluation Board - MLX90614
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******************************************************************************/
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#include <Wire.h> // I2C library, required for MLX90614
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#include <SparkFunMLX90614.h> // SparkFunMLX90614 Arduino library
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IRTherm therm; // Create an IRTherm object to interact with throughout
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void setup()
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{
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Serial.begin(115200); // Initialize Serial to log output
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Wire.begin(); // Join I2C bus
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// check if qwiic IR thermometer will acknowledge over I2C
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if (therm.begin() == false) {
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Serial.println("Qwiic IR thermometer did not acknowledge! Running I2C scanner.");
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}
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else {
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Serial.println("Device acknowledged!");
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Serial.println();
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Serial.println("Enter a new I2C address for the Qwiic IR Thermometer to use!");
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Serial.println("Don't use the 0x prefix. For instance, if you wanted to ");
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Serial.println("change the address to 0x5B, you would type 5B in the serial");
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Serial.println("input bar and press enter.");
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Serial.println();
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Serial.println("One more thing! Make sure your line ending is set to 'Both NL & CR'");
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Serial.println("in the Serial Monitor.");
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Serial.println();
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Serial.println("Note, for the new I2C address to take effect you need to power cycle");
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Serial.println("the MLX90614.");
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// Wait for serial data to be available
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while (Serial.available() == 0);
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if (Serial.available()) {
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uint8_t newAddress = 0;
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String stringBuffer = Serial.readString();
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char charBuffer[10];
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stringBuffer.toCharArray(charBuffer, 10);
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uint8_t success = sscanf(charBuffer, "%x", &newAddress);
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if (success) {
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if (newAddress > 0x08 && newAddress < 0x77) {
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Serial.println("Character received and device address is valid!");
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Serial.print("Attempting to set device address to 0x");
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Serial.println(newAddress, HEX);
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if (therm.setAddress(newAddress) == true) {
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Serial.println("Device address set succeeded!");
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}
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else {
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Serial.println("Device address set failed!");
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}
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delay(100); // give the hardware time to do whatever configurations it needs
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if (therm.isConnected()) {
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Serial.println("Device acknowledged on new I2C address!");
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} else {
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Serial.println("Device did not acknowledge on new I2C address!");
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}
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}
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else {
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Serial.println("Address out of range! Try an address between 0x08 and 0x77");
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}
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}
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else {
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Serial.println("Invalid text, try again.");
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}
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}
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delay(100);
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}
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// byte address;
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// if (!therm.readID()) // Try reading the ID registers
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// {
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// // If the read fails, try re-initializing with the
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// // new address. Maybe we've already set it.
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// therm.begin(newAddress);
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//
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// if (therm.readID()) // Read from the ID registers
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// { // If the read succeeded, print the ID:
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// Serial.println("Communicated with new address.");
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// Serial.println("ID: 0x" +
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// String(therm.getIDH(), HEX) +
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// String(therm.getIDL(), HEX));
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// }
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// else
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// {
117+
// Serial.println("Failed to communicate with either address.");
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// }
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// }
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// else
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// {
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// // If the read suceeds, change the address to something
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// // new.
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// if (!therm.setAddress(newAddress))
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// {
126+
// Serial.println("Failed to set new address.");
127+
// }
128+
// else
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// {
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// Serial.println("Set the address to 0x" + String(newAddress, HEX));
131+
// Serial.println("Cycle power to try it out.");
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// }
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// }
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}
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void loop()
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{
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// If no I2C device found or Qwiic IR thermometer is set to new address,
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// scan for available I2C devices
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byte error, address;
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int nDevices;
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Serial.println("Scanning...");
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nDevices = 0;
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for (address = 1; address < 127; address++) {
147+
// The i2c_scanner uses the return value of the Write.endTransmission()
148+
// to see if a device ddi acknowledge to the address.
149+
Wire.beginTransmission(address);
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error = Wire.endTransmission();
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if (error == 0) {
153+
Serial.print("I2C device found at address 0x");
154+
if (address < 16)
155+
Serial.print("0");
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Serial.print(address, HEX);
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Serial.println(" !");
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nDevices++;
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}
161+
else if (error == 4) {
162+
Serial.print("Unknown error at address 0x");
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if (address < 16)
164+
Serial.print("0");
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Serial.print(address, HEX);
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}
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}
168+
if (nDevices == 0)
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Serial.println("No I2C devices found\n");
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else
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Serial.println("done\n");
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delay(5000); // Wait 5 seconds for next scan
174+
}

‎examples/MLX90614_Set_Address/MLX90614_Set_Address.ino

Lines changed: 0 additions & 84 deletions
This file was deleted.

‎src/SparkFunMLX90614.cpp

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -221,7 +221,7 @@ uint8_t IRTherm::readAddress()
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return 0; // Else return fail
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}
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224-
uint8_t IRTherm::setAddress(uint8_t newAdd)
224+
bool IRTherm::setAddress(uint8_t newAdd)
225225
{
226226
int16_t tempAdd;
227227
// Make sure the address is within the proper range:

‎src/SparkFunMLX90614.h

Lines changed: 1 addition & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -122,7 +122,7 @@ class IRTherm
122122
// The <newAdd> parameter should be a value between 0x01 and 0x7F.
123123
// The function returns 1 on success and 0 on failure.
124124
// The new address won't take effect until the device is reset.
125-
uint8_t setAddress(uint8_t newAdd);
125+
bool setAddress(uint8_t newAdd);
126126

127127
// readID() reads the 64-bit ID of the MLX90614.
128128
// Return value is either 1 on success or 0 on failure.

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