Error when connecting to ESP8266 on external power

Hi @Tobbe,

It'll be because when the Pico isn't connected to USB, the 'console' (eg. left side of Web IDE) defaults to Serial1 (on B6/B7), which would then interfere with the ESP8266 also on there.

Try:

E.on('init', function() {
  USB.setConsole(); // <---------------------- force USB use even if USB not connected
  SPI2.setup({baud: 3200000, mosi: B15});
  Serial1.setup(115200, { rx: B7, tx : B6 });
  // ....