@brotherdust any chance you share the pin pad mapping on the bottom (at least RX/TX) ?

After a week playing with my new LoPy modules and the expansion board, here is my list of suggestions: I found very confusing the difference in numbering between the LoPy pinout (Pxx, GPIOxx, pin numbers... and the expansion board (Gxx). @jmarcelino has mentioned this already. I don't really understand why the user button and the LED are mapped on the same pins used for I2C. Why not any pin on the right hand side not used for other functions P12-P22? It would be great to add a couple of Grove connectors mapped to the I2C pins and two other GPIO pins. They are pretty much the standard these days and there are plenty of sensor modules available. A solar charging circuit and connector would be awesome for so many projects. Using a solar panel on the USB is kind of risky and definitely not ideal.

@mo-seph said in Hardware improvement suggestions: In addition to what other said: having the analogue reference voltage available would be really helpful, especially as it is a strange one (1.1v). Yes, for application where a reference voltage is required it would be good to have it, even if that will create new trouble. But .. I did not find an esp32 pin in the specs. more ground pins would also be good Yes, solid GND posts on either side a jumper for firmware boot mode on the expansion board would surely be useful - Yes, or better a switch. That would sort out some confusion. the boxes/bags that they come in should really take a lopy and an expansion board, as that's how they mostly get used In the box I got both a lopy and the expansion fixes. so no complaint.