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Document special-case return values

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Thanks, supakeen!

Additional thought: should maybe be an enum
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Juerd Waalboer 2020-12-26 17:35:20 +01:00
parent 7be2c6368c
commit 14f917b84f
1 changed files with 2 additions and 0 deletions
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operame.ino
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@ -385,6 +385,8 @@ int mhz_get_co2() {
}
int get_co2() {
// <0 means read error, 0 means still initializing, >0 is PPM value
if (driver == AQC) return aqc_get_co2();
if (driver == MHZ) return mhz_get_co2();