ADC B resolution set to 18 bitsADC C resolution set to 18 bits
'Thermocouple A' type set to R type
'Thermocouple B' type set to R type
'Thermocouple C' type set to R type
Filter coefficient value set to: 7
Filter coefficient value set to: 7
Filter coefficient value set to: 7
Top: nan
Middle: nan
Bottom: nan
Top: nan
Middle: nan
Bottom: nan
Top: nan
Middle: nan
Bottom: nan
Top: nan
Middle: nan
Bottom: nan
Top: nan
Middle: nan
Bottom: nan
Top: nan
Middle: nan
Bottom: nan
And the code -
#include <Wire.h>
#include <Adafruit_I2CDevice.h>
#include <Adafruit_I2CRegister.h>
#include "Adafruit_MCP9600.h"
Adafruit_MCP9600 mcp_A;
Adafruit_MCP9600 mcp_B;
Adafruit_MCP9600 mcp_C;
void setup()
{
Serial.begin(115200);
while (!Serial) {
delay(10);
}
Serial.println("MCP9600 HW test");
/* Initialise the driver with I2C_ADDRESS and the default I2C bus. */
/* Initialise each device with it address and the default I2C bus. */
if (! mcp_A.begin(0x60)) {
Serial.println("Sensor A not found. Check wiring!");
while (1);
}
if (! mcp_B.begin(0x65)) {
Serial.println("Sensor B not found. Check wiring!");
while (1);
}
if (! mcp_C.begin(0x67)) {
Serial.println("Sensor C not found. Check wiring!");
while (1);
}
Serial.println("Found MCP9600!");
mcp_A.setADCresolution(MCP9600_ADCRESOLUTION_18);
Serial.print("ADC A resolution set to ");
switch (mcp_A.getADCresolution()) {
case MCP9600_ADCRESOLUTION_18: Serial.print("18"); break;
case MCP9600_ADCRESOLUTION_16: Serial.print("16"); break;
case MCP9600_ADCRESOLUTION_14: Serial.print("14"); break;
case MCP9600_ADCRESOLUTION_12: Serial.print("12"); break;
}
Serial.println(" bits");
mcp_B.setADCresolution(MCP9600_ADCRESOLUTION_18);
Serial.print("ADC B resolution set to ");
switch (mcp_B.getADCresolution()) {
case MCP9600_ADCRESOLUTION_18: Serial.print("18"); break;
case MCP9600_ADCRESOLUTION_16: Serial.print("16"); break;
case MCP9600_ADCRESOLUTION_14: Serial.print("14"); break;
case MCP9600_ADCRESOLUTION_12: Serial.print("12"); break;
}
Serial.println(" bits");
mcp_C.setADCresolution(MCP9600_ADCRESOLUTION_18);
Serial.print("ADC C resolution set to ");
switch (mcp_C.getADCresolution()) {
case MCP9600_ADCRESOLUTION_18: Serial.print("18"); break;
case MCP9600_ADCRESOLUTION_16: Serial.print("16"); break;
case MCP9600_ADCRESOLUTION_14: Serial.print("14"); break;
case MCP9600_ADCRESOLUTION_12: Serial.print("12"); break;
}
Serial.println(" bits");
mcp_A.setThermocoupleType(MCP9600_TYPE_R);
Serial.print("'Thermocouple A' type set to ");
switch (mcp_A.getThermocoupleType()) {
case MCP9600_TYPE_K: Serial.print("K"); break;
case MCP9600_TYPE_J: Serial.print("J"); break;
case MCP9600_TYPE_T: Serial.print("T"); break;
case MCP9600_TYPE_N: Serial.print("N"); break;
case MCP9600_TYPE_S: Serial.print("S"); break;
case MCP9600_TYPE_E: Serial.print("E"); break;
case MCP9600_TYPE_B: Serial.print("B"); break;
case MCP9600_TYPE_R: Serial.print("R"); break;
}
Serial.println(" type");
mcp_B.setThermocoupleType(MCP9600_TYPE_R);
Serial.print("'Thermocouple B' type set to ");
switch (mcp_B.getThermocoupleType()) {
case MCP9600_TYPE_K: Serial.print("K"); break;
case MCP9600_TYPE_J: Serial.print("J"); break;
case MCP9600_TYPE_T: Serial.print("T"); break;
case MCP9600_TYPE_N: Serial.print("N"); break;
case MCP9600_TYPE_S: Serial.print("S"); break;
case MCP9600_TYPE_E: Serial.print("E"); break;
case MCP9600_TYPE_B: Serial.print("B"); break;
case MCP9600_TYPE_R: Serial.print("R"); break;
}
Serial.println(" type");
mcp_C.setThermocoupleType(MCP9600_TYPE_R);
Serial.print("'Thermocouple C' type set to ");
switch (mcp_C.getThermocoupleType()) {
case MCP9600_TYPE_K: Serial.print("K"); break;
case MCP9600_TYPE_J: Serial.print("J"); break;
case MCP9600_TYPE_T: Serial.print("T"); break;
case MCP9600_TYPE_N: Serial.print("N"); break;
case MCP9600_TYPE_S: Serial.print("S"); break;
case MCP9600_TYPE_E: Serial.print("E"); break;
case MCP9600_TYPE_B: Serial.print("B"); break;
case MCP9600_TYPE_R: Serial.print("R"); break;
}
Serial.println(" type");
mcp_A.setFilterCoefficient(7);
Serial.print("Filter coefficient value set to: ");
Serial.println(mcp_A.getFilterCoefficient());
mcp_B.setFilterCoefficient(7);
Serial.print("Filter coefficient value set to: ");
Serial.println(mcp_B.getFilterCoefficient());
mcp_C.setFilterCoefficient(7);
Serial.print("Filter coefficient value set to: ");
Serial.println(mcp_C.getFilterCoefficient());
As you can see below, I soldered a jumper tab on one of the thermocouple amplifiers to change its address output and grounded the addr pin on the other giving me 0x60, 0x64 and 0x67 as my device address list. Please could someone advise why it doesn't feedback any useable data?
Your code is not complete.
But already from the part that you uploaded, it is clear that the code is not written very well.
Writing code for three sensors by copying blocks of code for one sensor is a very bad programming style, in which it is easy to make mistakes and confuse the sensor you are working with.
For multiple instances of the same code, use arrays, procedures, and functions
Have you got code that JUST connects and reads ONE 9600?
If not then it would be a good place to start.
This will prove your hardware connection and communications.
It looks like a lot of code to suddenly find you can't get any data.
By default, the ADDR pin is tied to Vin. This sets the default I2C address to 0x67. To change the I2C address, you can use the provided jumpers, or tie the ADDR pin directly to GND. This breakout supports a total of five I2C addresses, meaning you can connect up to five MCP9600 breakouts on the same I2C bus.
Use the following table to determine what to apply to the ADDR pin to get the desired address. The jumpers are numbered in the image. J1 applies to jumper 1, and J2 appli es to jumper 2. An - in the table means no action needed, and an X in the table means to solder closed a jumper. The final address requires tying the ADDR pin to the GND pin, and in that case, all other changes are ignored.
Yes I have used the example code provided with the sensor and configured it to run with a single sensor. From this basis I wanted to create a code to run three sensors but am not entirely sure how to use Functions and Arrays to do so as @b707 mentioned.
Apologies I didn't paste in the final piece of code, here is the full code -
#include <Wire.h>
#include <Adafruit_I2CDevice.h>
#include <Adafruit_I2CRegister.h>
#include "Adafruit_MCP9600.h"
Adafruit_MCP9600 mcp_A;
Adafruit_MCP9600 mcp_B;
Adafruit_MCP9600 mcp_C;
void setup()
{
Serial.begin(115200);
while (!Serial) {
delay(10);
}
Serial.println("MCP9600 HW test");
/* Initialise the driver with I2C_ADDRESS and the default I2C bus. */
/* Initialise each device with it address and the default I2C bus. */
if (! mcp_A.begin(0x60)) {
Serial.println("Sensor A not found. Check wiring!");
while (1);
}
if (! mcp_B.begin(0x65)) {
Serial.println("Sensor B not found. Check wiring!");
while (1);
}
if (! mcp_C.begin(0x67)) {
Serial.println("Sensor C not found. Check wiring!");
while (1);
}
Serial.println("Found MCP9600!");
mcp_A.setADCresolution(MCP9600_ADCRESOLUTION_18);
Serial.print("ADC A resolution set to ");
switch (mcp_A.getADCresolution()) {
case MCP9600_ADCRESOLUTION_18: Serial.print("18"); break;
case MCP9600_ADCRESOLUTION_16: Serial.print("16"); break;
case MCP9600_ADCRESOLUTION_14: Serial.print("14"); break;
case MCP9600_ADCRESOLUTION_12: Serial.print("12"); break;
}
Serial.println(" bits");
mcp_B.setADCresolution(MCP9600_ADCRESOLUTION_18);
Serial.print("ADC B resolution set to ");
switch (mcp_B.getADCresolution()) {
case MCP9600_ADCRESOLUTION_18: Serial.print("18"); break;
case MCP9600_ADCRESOLUTION_16: Serial.print("16"); break;
case MCP9600_ADCRESOLUTION_14: Serial.print("14"); break;
case MCP9600_ADCRESOLUTION_12: Serial.print("12"); break;
}
Serial.println(" bits");
mcp_C.setADCresolution(MCP9600_ADCRESOLUTION_18);
Serial.print("ADC C resolution set to ");
switch (mcp_C.getADCresolution()) {
case MCP9600_ADCRESOLUTION_18: Serial.print("18"); break;
case MCP9600_ADCRESOLUTION_16: Serial.print("16"); break;
case MCP9600_ADCRESOLUTION_14: Serial.print("14"); break;
case MCP9600_ADCRESOLUTION_12: Serial.print("12"); break;
}
Serial.println(" bits");
mcp_A.setThermocoupleType(MCP9600_TYPE_R);
Serial.print("'Thermocouple A' type set to ");
switch (mcp_A.getThermocoupleType()) {
case MCP9600_TYPE_K: Serial.print("K"); break;
case MCP9600_TYPE_J: Serial.print("J"); break;
case MCP9600_TYPE_T: Serial.print("T"); break;
case MCP9600_TYPE_N: Serial.print("N"); break;
case MCP9600_TYPE_S: Serial.print("S"); break;
case MCP9600_TYPE_E: Serial.print("E"); break;
case MCP9600_TYPE_B: Serial.print("B"); break;
case MCP9600_TYPE_R: Serial.print("R"); break;
}
Serial.println(" type");
mcp_B.setThermocoupleType(MCP9600_TYPE_R);
Serial.print("'Thermocouple B' type set to ");
switch (mcp_B.getThermocoupleType()) {
case MCP9600_TYPE_K: Serial.print("K"); break;
case MCP9600_TYPE_J: Serial.print("J"); break;
case MCP9600_TYPE_T: Serial.print("T"); break;
case MCP9600_TYPE_N: Serial.print("N"); break;
case MCP9600_TYPE_S: Serial.print("S"); break;
case MCP9600_TYPE_E: Serial.print("E"); break;
case MCP9600_TYPE_B: Serial.print("B"); break;
case MCP9600_TYPE_R: Serial.print("R"); break;
}
Serial.println(" type");
mcp_C.setThermocoupleType(MCP9600_TYPE_R);
Serial.print("'Thermocouple C' type set to ");
switch (mcp_C.getThermocoupleType()) {
case MCP9600_TYPE_K: Serial.print("K"); break;
case MCP9600_TYPE_J: Serial.print("J"); break;
case MCP9600_TYPE_T: Serial.print("T"); break;
case MCP9600_TYPE_N: Serial.print("N"); break;
case MCP9600_TYPE_S: Serial.print("S"); break;
case MCP9600_TYPE_E: Serial.print("E"); break;
case MCP9600_TYPE_B: Serial.print("B"); break;
case MCP9600_TYPE_R: Serial.print("R"); break;
}
Serial.println(" type");
mcp_A.setFilterCoefficient(7);
Serial.print("Filter coefficient value set to: ");
Serial.println(mcp_A.getFilterCoefficient());
mcp_B.setFilterCoefficient(7);
Serial.print("Filter coefficient value set to: ");
Serial.println(mcp_B.getFilterCoefficient());
mcp_C.setFilterCoefficient(7);
Serial.print("Filter coefficient value set to: ");
Serial.println(mcp_C.getFilterCoefficient());
Serial.println(F("------------------------------"));
}
void loop()
{
Serial.print("Top: "); Serial.println(mcp_A.readThermocouple());
Serial.print("Middle: "); Serial.println(mcp_B.readThermocouple());
Serial.print("Bottom: "); Serial.println(mcp_C.readThermocouple());
delay(1000);
}
@J-M-L thank you for your reply, I have used the I2C scanner and confirmed I can receive 0x60, 0x65 and 0x67 as the addresses for the 3 different MCP9600 amplifiers I am using.
Might someone be able to help with how I could restructure the code such that it can read properly?
@J-M-L, thank you for your advice. I'll try the resistors too.
This is what I was getting on the serial monitor -
MCP9600 HW test
Found MCP9600!
ADC A resolution set to 18 bits
ADC B resolution set to 18 bits
ADC C resolution set to 18
'Thermocouple A' type set to R type
'Thermocouple B' type set to R type
'Thermocouple C' type set to R type
Filter coefficient value set to: 7
Filter coefficient value set to: 7
Filter coefficient value set to: 7
------------------------------
Top: nan
Middle: nan
Bottom: nan
Top: nan
Middle: nan
Bottom: nan
Top: nan
Middle: nan
Bottom: nan
Top: nan
Middle: nan
Bottom: nan
Top: nan
Middle: nan
Bottom: nan
Top: nan
Middle: nan
Bottom: nan
Top: nan
Middle: nan
Bottom: nan
Ln 127, Col 70
Arduino NANO 33 IoT
on COM6
Hi @b707, yes I do. They are daisy chained to the same thermocouple using the appropriate wire. Tested In parallel with a pyrometer on the code designed for a single MCP9600 I get the same reading as the pyrometer however when I attempt it with my multi-MCP9600 code it produces a different result.
If you are using one T/C as an input to all three converters you are probably creating ground loops that are causing your issues. If you don’t have individual T/C’s yet you can make temporary ones using your extension wire by twisting the two conductors together.
Or connect your one T/C to each converter, one at a time. You will see an open indication on the two converters without the T/C connected and a proper reading on the one with the T/C connected.
