Ai-Thinker A20
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Based on a ESP8285 chip, so only 1M Flash, can be flashed with a stripped down build of latest mega build, GSM/GPRS and Camera not yet supported!
Flashing Instructions
To enable Flash mode for the esp8285:
power down the board connect WI 00 to ground connect power to the board. flash using WRX0 and WTX0 for the Rx Tx connections