ESP32 irrigation pump webserver

Features:

• webserver to turn pump on and off
• set length to run pump
• read pump status from external opt-coupler

Hardware Assumptions

You're running an ESP32. We use this WROVER one

You have a powerful enough relay/contactor to flip on your "pump". We use these:

• 380V 25A relay

You have some kind of feedback telling you if the power if on or off:

• 220V AC Detection board. Note we use a 10k pull-up resistor and the output is inverted.

Building & Installing

MicroPython Environment Installation

Download micropython (spiram-idf4) here

sudo apt get install esptool
esptool.py --port /dev/ttyUSB0 erase_flash
esptool.py --port /dev/ttyUSB0 --baud 460800 write_flash --flash_size=detect 0x1000 ./micro-python/esp32spiram-idf4-20191220-v1.12.bin

Installing the Base Python code

pip3 install adafruit-ampy --upgrade
ampy --port /dev/ttyUSB0 put config.py /config.py
ampy --port /dev/ttyUSB0 put www /www
ampy --port /dev/ttyUSB0 put /MicroWebSrv2/MicroWebSrv2 /MicroWebSrv2

Installing the default version (web control only)

ampy --port /dev/ttyUSB0 put main.py /main.py

Installing the external control version

This version has the web functionality + external controls tied to sensors + influxdb logging

Level sensors:

• High Water (tank full)
• Mid Water (start filling)
• Low Water (report status for alerts)

Pressure sensors:

• Filter Input (report status for alerts)