Example3 SetFilterCoeffecients occasionally produces bad output

[fischermoseley]

Configuration

• Reproduceable with software from commit hash ad66b22

• SparkFun Redboard with Qwiic Shield connected to a MCP9600 via Qwiic.

• Example3_SetFilterCoeffecients.ino flashed and serial terminal open.

• The variable "coefficient" (defined on line 22) must not be equal to zero or greater than seven for the code to work at all.

• This issue seems to happen for coefficient = 2, 3, 4 but it seems to not happen for coefficient = 5, 6,7.

Expected Output

For coefficient = 2:
Thermocouple: 22.87 °C Ambient: 23.25 °C Temperature Delta: -0.44 °C Current Coeffecient: 10 Thermocouple: 22.81 °C Ambient: 23.25 °C Temperature Delta: -0.50 °C Current Coeffecient: 10 Thermocouple: 22.81 °C Ambient: 23.31 °C Temperature Delta: -0.50 °C Current Coeffecient: 10 Thermocouple: 22.81 °C Ambient: 23.31 °C Temperature Delta: -0.50 °C Current Coeffecient: 10 Thermocouple: 22.81 °C Ambient: 23.25 °C Temperature Delta: -0.50 °C Current Coeffecient: 10 Thermocouple: 22.81 °C Ambient: 23.25 °C Temperature Delta: -0.50 °C Current Coeffecient: 10

Actual Output

For coefficient = 2:
Thermocouple: 22.81 °C Ambient: 23.31 °C Temperature Delta: -0.50 °C Current Coeffecient: 10 Thermocouple: 22.81 °C Ambient: 23.25 °C Temperature Delta: -0.50 °C Current Coeffecient: 10 Thermocouple: 22.81 °C Ambient: 23.25 °C Temperature Delta: -0.50 °C Current Coeffecient: 10 Thermocouple: 22.81 °C Ambient: 23.25 °C Temperature Delta: -0.50 °C Current Coeffecient: 0 Thermocouple: 22.81 °C Ambient: 23.31 °C Temperature Delta: -0.50 °C Current Coeffecient: 10

[nseidle]

This is a fairly rare edge case. Let's leave it open and see if anyone else has the issue.

There's also the chance that this is another IC errata but hard to say without more user feedback.

[PaulZC]

I believe this is resolved by v1.0.6:

https://github.com/sparkfun/SparkFun_MCP9600_Arduino_Library/releases/tag/v1.0.6

Closing... After only six years!