I have a Pro mini 3.3v 8 Mhz hooked up to ESP8266 (Wemos D1 Mini), both are powered separately through different USB ports, the Pro Mini is powered through FTDI adapter with jumper selected on 5v (connected to Raw pin on arduino). I am using Software Serial 19200 baud rate (which isn't max), the pr…

Pro Mini 3.3v <-> ESP8266 Software Serial voltage drop on Pro mini Rx

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