There is! You can try Serial1.setup(9600, {rx:..,tx:..,flow:"xon"}) which will enable software flow control. The Web IDE should honour that so will pause sending data if too much comes.
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There is! You can try
Serial1.setup(9600, {rx:..,tx:..,flow:"xon"})
which will enable software flow control. The Web IDE should honour that so will pause sending data if too much comes.