This revision of the Sowillo IoT Box is aimed at DIY enthusiasts and Open Source fans. Being Open Source adepts, our team decided to make our hardware available to the Community!

Do you want to monitor how much you spend on water heating? Tweak your lighting or add connect to a 433MHz smoke detector? Maybe, something peculiar to your needs? With Sowillo Box IoT you can!

This hardware revision is fully compatible with ESPHome (see the tutorial).

Our ultra-compact footprint board is mighty, packing:

A pair of high-power relays (250V 16A) to switch various devices, such as motors, valves, or even an electric heater;
Cheap 1-Wire DS18B20 family temperature sensors — as many as you want;
An AC current sensor — monitor power and detect failures in your appliances;
Rich connectivity with WiFi, BLE, LoRa, and 433 MHz on-board — for ultimate connectivity and flexibility;
I2C and SPI for hooking thousands of supported devices;
Serial port for monitoring and debugging;
Modbus for the industrial hardware you might have.

Multiple shields allow you to tweak your solution as needed:

Sowillo Box AC Power Shield (AC 85V-265V, with 3.6V Li battery backup);
Sowillo Box DC Power Shield (DC 7V-50V, with 3.6V Li battery backup).

For more demanding applications when you want to switch multiple devices (more than 2), please make sure to pay attention to our I2C relay board.

Specifications:

Connectivity (Wired): Modbus, Serial, I2C, SPI;
Connectivity (Wireless): WiFi, BLE, Lora, 433Mhz;
Measurement: flow (ultrasonic), digital temperature sensors DS18B20 (any amount supported by the manufacturer), AC current, custom sensors via I2C/SPI;
Outputs: 12A (motor/valve/lamp output), 16A (heater output), 16x 10A relays (I2C extension board)
Inputs: Buttons, Digital 3.3V
PCB dimensions 85x65 mm

Power relays are located on the power shields, please choose the relevant option.

Lithium battery not included.