Esooli 1 Gang Switch (SL-Wifi-01)
USB to Serial
Configuration (old format, will be converted to new template when applied)
Appears to be the same as ZUCZUG 1 Gang.
To flash I needed to power up the device without GPIO0 low; put GPIO0 low then briefly put RST to low. Otherwise would not flash. Pads across the top to flash, looking left to right (with writing correct way up): 3V3, RX, TX, GPIO0, RST, GND