https://www.aliexpress.com/item/ESP8266 ... 76755.html
In what is surely the smallest form factor I have yet seen for these chips, you get an integrated antenna along with way more GPIOs than most of the other boards except perhaps the very largest ones, including the ADC pin, which is not available on many of the smaller boards. Sure, the integrated flash is only 1MB, but I've been working with the ESP-01S anyway, so that's already fine with me.
As far as I can tell, the only features this board lacks that other boards have are an integrated LED (usually attached to GPIO2) and an obvious connection between RST and XPD_DCDC to enable auto-wake from deep sleep (not a connection that I can confirm from the specs at any rate). But, one of the numerous explosed GPIOs is, in fact, GPIO16, which is usually synonymous with XPD_DCDC, which raises two questions:
- Do you believe I could enable deep-sleep-wake-up by simply connecting the exposed GPIO16 to RST?
- If that wouldn't work, how hard would it be to remove the wifi shield so I can gain access to the chip to perform the established hack wherein the XPD_DCDC pin (thankfully a corner pin) is hard-wired to RST? How does one remove that shield?