smol pcb to connect 4x analog capacitive soilmoisture sensors directly to an ADS1115. Hopefully handy for grow tents

One thing I should have added, will add in next revision: second I2C header to connect another sensor directly to the bus.

https://git.la10cy.net/DeltaLima/CanGrow-ADS1115-AnalogSoilmoisture-Adapterboard

It’s not pretty, but it works! This is the breadboard setup for the #HomeAutomation that will be controlling our #solar kiln.

At the heart is an #esp32 running #esphome. It controls 5 relays (2 sets of fans, a light and 2 relays for a linear actuator for the vent shutters). It has inputs for 3 switches (fans and light), 2 #DS18B20 temperature sensors, and an #ads1115 for a couple of CT clamps.

All controllable via #HomeAssistant. Hoping to wire it up properly this weekend.

I just did a comparison with the ADS1115 and the ADC on the Pi Pico. No comparison. The ADS1115 produces repeatable figures. Nothing was connected to any of the ADC lines. The built-in ADC on the Pi Pico looks to be somewhat of a joke or maybe a misnamed random number generator.