Need help with floating point into array formatting

Projects Programming
6

I may have spoke to soon. With additional testing, I discovered I had a typo in the cycling thru all 3 states.

At the very end, if I change tempToRead from 0 to 3 so it correctly cycles thru all 3 MAX31865 chips, it screws up operating:

    // ****  End Temperature Reading Code  **************
    // convert to array format for sending to GPS module 

    temp2Int = (unsigned int)(TemperatureF2 * 10.0); // assuming TemperatureF will have 4 digits
    String heatConv2 = String(temp2Int); // construct string representation
    heatConv2.toCharArray(TemperatureF2char, 5); // string representation is 4 chars plus null terminator, copy 4 characters, ignore null terminator

    tempToRead = 0;

    break;
  }
}

// SPI mode changes - need for shift registers
SPI.setDataMode(SPI_MODE0); // choices 0,1,2,3 - reset to 0 for shift registers

If it is 0, the code sequences correctly, once it seems, the jump to the non-existent case 0 then never reads the switches to fake the high/low temperature again.

What am I missing still?
Thanks

d4_temp0_2.ino (20.9 KB)