Thermocouple Type seems to get set to "K" by"setFilterCoefficient(coefficient)"

[rwischinski]

Subject of the issue

Thermocouple Type seems to get set to "K" when "setFilterCoefficient(coefficient)" is executed.

Potential Cause

setFilterCoefficient lib code does not seem to read correct Thermocouple Type Select bits:

uint8_t MCP9600::setFilterCoefficient(uint8_t coefficient) { if (coefficient > 7) return 3; //return immediately if the value is too big

uint8_t config = readSingleRegister(THERMO_SENSOR_CONFIG); // Current code //bitWrite(coefficient, 3, bitRead(config, 3)); //bitWrite(coefficient, 4, bitRead(config, 3)); //bitWrite(coefficient, 5, bitRead(config, 3)); //bitWrite(coefficient, 6, bitRead(config, 3)); //bitWrite(coefficient, 7, bitRead(config, 3));

// Should be ? bitWrite(coefficient, 3, bitRead(config, 3)); bitWrite(coefficient, 4, bitRead(config, 4)); bitWrite(coefficient, 5, bitRead(config, 5)); bitWrite(coefficient, 6, bitRead(config, 6)); bitWrite(coefficient, 7, bitRead(config, 7));

return writeSingleRegister(THERMO_SENSOR_CONFIG, coefficient); }

[paulvha]

recently bought this sensor and I agree with your findings. This should be changed and I think this is also the root cause for an older problem https://github.com/sparkfun/SparkFun_MCP9600_Arduino_Library/issues/1

Regards, Paulvha