| Coffee Roaster Serial Protocol |
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| Commands are sent to the Arduino. Responses come from the Arduino. |
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| A response is sent after every command. |
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A command to set the heater or fan value is ignored and no response is sent if the command mode is Manual
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Serial Characters |
Description |
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| Command |
Set control mode |
: |
Start character |
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> |
Set command |
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C or M |
Computer or Manual |
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/ |
End character |
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| Response |
Control mode |
: |
Start character |
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C or M |
Computer or Manual |
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/ |
End character |
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| Response |
Unknown command |
: |
Start character |
For any unrecognized command |
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U |
Unknown |
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/ |
End character |
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| Command |
Read control mode |
: |
Start character |
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? |
Read command |
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C |
Control mode |
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/ |
End character |
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| Response |
Control mode |
See above |
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| Command |
Read temperature |
: |
Start character |
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? |
Read command |
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T |
Temperature |
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/ |
End character |
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| Response |
Temperature |
: |
Start character |
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T |
Temperature |
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0-9 |
Digit 1 |
Temperature in degrees C |
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0-9 |
Digit 2 |
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0-9 |
Digit 3 |
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. |
Decimal point |
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0-9 |
Digit 4 |
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0-9 |
Digit 5 |
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/ |
End character |
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| Command |
Set Heater |
: |
Start character |
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> |
Set command |
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H |
Heater |
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0-9 |
Digit 1 |
0-100% |
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0-9 |
Digit 2 |
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0-9 |
Digit 3 |
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/ |
End character |
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| Response |
Heater Value |
: |
Start character |
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H |
Heater |
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0-9 |
Digit 1 |
0-100% |
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0-9 |
Digit 2 |
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0-9 |
Digit 3 |
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/ |
End character |
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| Command |
Read Heater |
: |
Start character |
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? |
Read command |
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H |
Heater |
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/ |
End character |
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| Response |
Heater Value |
See above |
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| Command |
Set Fan |
: |
Start character |
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> |
Set command |
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F |
Fan |
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0-9 |
Digit 1 |
0-100% |
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0-9 |
Digit 2 |
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0-9 |
Digit 3 |
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/ |
End character |
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| Response |
Fan Value |
: |
Start character |
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F |
Fan |
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0-9 |
Digit 1 |
0-100% |
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0-9 |
Digit 2 |
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0-9 |
Digit 3 |
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/ |
End character |
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| Command |
Read Fan |
: |
Start character |
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? |
Read command |
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F |
Fan |
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/ |
End character |
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| Response |
Fan Value |
See above |
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