Intelliflo 3 Vsf Manual

[Lucrecio Poinson]

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I'm not familiar with the ESP-WROOM-32 board that @keithco is using. Does it have more than 1 serial port? Images I have seen online show a USB connector. Does the chip have native USB support or is there an on-board USB-Serial interface chip (CH340G maybe) that may also be using the same serial port hardware?

That's what i would expect to see when you scope the A and B signals. Your code enables the transmit line driver and the A & B signals become opposites - i.e. differential (left hand side of your red box). Your code then has a 10ms delay which is what you see in the rest of your red box. The bytes are then transmitted.

Slight tweak of the code. Thanks about catching the 10ms delay.

Now I do the Serial.write() then enable the transmit. Also added a preamble of 0xFF, 0x00, 0xFF but still not getting an acknowledgment from the pump.

I think we've probably reached the point where we need to check what the pump communications settings are. As I previously asked, do you have a model number for the pump and a link to the user manual/guide for it?

Hi Mark, Sorry about missing the model number question. Pentair 011018 IntelliFlo Variable Speed Pump. Link to manual: -pool/residential/manuals/pool-pumps/intelliflo-vs/intelliflo-vs-pump-manual-english.pdf

One thing that i'm wondering about is in your RealTerm serial capture program and why the message you are sending appears correctly in RealTerm but has an additional 0x00 on the end of it. Probably nothing.

Something else to try, add a 1ms delay after the serial.flush() command, just to see if that spurious 0x00 disappears. You can also monitor it on your scope where you should see your A & B signals in a steady state for 1ms after the data has gone.

Another thought that might make things easier. I don't know RealTerm very well, but can you use that to send out your byte sequence. I know I could if I was using my Hercules serial software. (It's a free windows program, you can get it from here).

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