Yeah this is the problem with not doing bare-metal coding. There is a LOT of other code running on the micro(s). RTOS, etc. I'm pretty sure GPIO2 is usable, it's just a matter of finding out what code is squatting on it. That's where I didn't have time to investigate. Someone mentioned "unconfig" (o...

Are you sinking current from the supply through the LED to the GPIO? I don't know if there's enough current available to source it through the LED to ground (each case of course with a current limiting resistor). I need to spend more time looking at the GPIO modes and pullup configuration before I'm...

What OS version of WIndows supports this? I tried the Espressif demo and it worked on my phone but none of my PCs.

Hi, Is it possible to build a legacy Bluetooth keyboard that works with desktop PCs (like Windows 7 or 8)? The HID demo I have seen (ble_hid_device_demo) works on my Android phone but on my Win7 desktop PC it doesn't appear at all and on my Win8 laptop it pairs but no driver is loaded. This demo (bl...

I wasn't aware of the default configuration so if it was open drain I was going to add an pullup. Otherwise I was going to see what the gpio config functions do. Anyway it appears that by default some other function is controlling that pin and I haven't waded through the fog to see what's going on i...

I'm working through the Blink example and it's finally building and loading OK I think. I just have the board alone (no breadboard) and it is powered by USB. There is no other hardware. The Blink example toggles GPIO2 every second by code. I can see the level on my oscilloscope changing about 0.2v b...