Sump Pump Controller and Monitor

First Version: 

Water level monitor only using an ultrasonic distance sensor

• https://ezmation.com/content/7-sump-pump-water-level

Second Version: 

• Remove the watchdog controller and replace it with an ESP8266
• https://github.com/irblaster/esphome_sump_pump_control

Third Version - Under exploration.

• Add current monitoring for charge current and pump current
• Options for additional ADC inputs:

1. Switch to ESP32 
2. ADS1115 4 channel ADC to i2c -> directly supported by ESPHOME -> ~ $4 each
3. ADS1015 4 channel ADC, 12 bit ADC instead of 16 bit.  Plenty for this project, but not directly supported, need to investigate ~ $2 each
4. cd74hc4067 analog mux ~ $1 each

• Current Sense Amplifier :

1. INA199A1DCKR - $0.50

Final version will be a custom PCB