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did you forget to attach the file?
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wow, looks excellent! thanks for sharing
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WOW, those are rough notes?
I''m going to have to print those out and give it a read through a couple of times
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Thanks for sharing afinite.
If I understand your notes correctly, you are using the ESP8266’s 33 volt connection to measure resistance across the tank level sender, but you tanks are NO LONGER hooked up you your boats 12 volt battery system?
Mine are connected to 12 volt analog gauges, so I am having trouble figuring that out, but I never considered disconnecting them and “going directly to an ESP or even straight to the Pi.
Thanks for the lesson. I’m still looking at my options.
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I like the idea of replacing my analog displays with something digital, thereby removing my tanks from my 12 volt set up. Mine are old VDO gauges and they work.
I understand the theory of resistance (VDO senders are 0-90 ohms), so that isn't really the proplem, but is there a way to integrate what I have without removing the tanks/guages from the 12volt house bank? Seems that most ADCs are isolated, so is it a simple case of limiting the voltage to 5 volt (or 3.3volts) from 12?
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Im not an electronics expert (so please double check this) but I would have thought is would work if you simply created a resistance bridge to reduce the full-scale voltage from the sender to 3.3v then its just a case of calibrating the ADS1115 in ESPEASY.
The bridge would comprise Ground - 1kOhm -1 x 3kOhm - Attach to tank sender.(max 12v).
I would have thought this would work in parallel with the VDO gauges.