3 ms·
Yep that. Just a get a full whack Lenovo mini PC. If you need GPIO, unless it's high bandwidth stuff, a MCP2221A break out and I2C ADC/expander is probably bet
by hggigg 2y ago
Yep that. Just a get a full whack Lenovo mini PC.
If you need GPIO, unless it's high bandwidth stuff, a MCP2221A break out and I2C ADC/expander is probably better anyway. You can stack as many MCP23017 as you need on one of them.
- echoangle 2y agoYes, if you actually do need GPIO, you can still just attach something external unless you need close-to-realtime reactions or high bandwidth. MCP2221A breakout boards seem to be relatively expensive though (about $10?), my ugly solution would be something like an ESP32 receiving commands over Serial and setting its GPIO pins. Very overkill and a waste of a very capable chip, but ESP32 start at $1.50 or so, that’s hard to beat.
- hggigg 2y agoGood idea with the ESP32. As for the MCP2221A boards, there's a fresh supply of them for under $5 from China and they just work out of the box on Linux with off the shelf python library so no having to futz with the brains of the ESP32.