🐻 4 Pack Serial Wombat 4B - I2C Smart I/O Expander with A/D Converter: Drive Servos, Switches, Quadrature Encoders, and UART/I2C Bridge - I2C Compatible with Arduino Review

Very useful little IC for general repairs. It's very handy to offload the main processor based on a digital pulse counter interrupt or quickly add a few A/D channels to something analog like the ESP8266.

I am building a project with Wemos and an E-Paper display. Not enough gpio after connecting the display (epapers spi interface used 6). I came across a wombat and it was just what I needed. E-Paper also takes a relatively long time to update, making it difficult to eliminate key bounce. Wombat solved this problem and I look forward to using its other features in future projects.

These ICs are everything they advertise. I am planning to use 4 of these for an IoT application where my ESP32 Nodemcu board needs to communicate with 4 RFID modules. Since ESP doesn't have 4 serial ports and RFID modules don't support addresses, these serial wombats were the perfect solution. If you are familiar with i2c and uart in Arduino you can get them up and running in less than 30 minutes. It is clear that the manufacturer is enthusiastic about its project and has responded to support…

Easy to use. If you have experience with I/O expanders and want something more compact then this is for you. Tried with arduino uno p3. I have to try seeeduino xiao but I'm sure it should work.

Serial wombat is MUCH BIGGER than an I2C expander. As soon as I read about the Wombat I developed four of them into a board that I designed to provide IoT pool automation (circulation, heating, pool chemistry) based on the DFRobot WiDo Arduino. I got four of these and installed them in the sockets on the board. It then took me several hours to use the libraries to place 6 LEDs, 6 buttons, two hall effect flow sensors, two rotary encoders, two analog chemical sensors and four tri-state jumpers -