Dividing telemetry sensor values. #5089
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Hi everyone! I own many different RC models, and they all have different cells and battery types (LiPo/LiHV). So instead of trying to memorize what’s dead, storage, and full for 2s, 3s, 4s, and 6s, I just memorized it per cell (about 3.2 is about dead, 3.8 is storage, 4.2 or 4.3 for LiHV is full). I want the approximate cell voltage displayed on my telemetry screen on my RadioMaster MT12, but I don’t know how to do it reliably. (I have a battery sensor which is accurate, and I have two instances so I can have the cell voltage and also have the standard reading.) what settings do I change in the sensor settings to divide it by 2, 3, 4, and 6? (To get the average cell voltage) I looked at the manual but I’m still not quite sure what to do. thanks for any help!
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Use the ratio parameter. 25.5 is equivalent to 1 (8 bit int/10). So for example if you have a 3s battery you want 25.5/3 = 8.5 for the ratio value. Once you have the ratio set correctly it's usually a good idea to put a trusted voltmeter on the battery and tweak the offset parameter to account for any inaccuracies in the RX sensor. |
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Exactly what I needed; thanks! |
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Use the ratio parameter. 25.5 is equivalent to 1 (8 bit int/10).
So for example if you have a 3s battery you want 25.5/3 = 8.5 for the ratio value.
Once you have the ratio set correctly it's usually a good idea to put a trusted voltmeter on the battery and tweak the offset parameter to account for any inaccuracies in the RX sensor.