Serial Monitor appears unreadable characters

Question

Hello

My serial monitor keep showing these unreadable characters. Anyone know what is going on? Many thanks!

Can you try a minimal example of Serial.begin(9600); Serial.println("Hello world!");? — Maximilian Gerhardt, Commented Apr 2, 2018 at 19:14
Then start adding connections, components and code until the error shows up. Does connecting RX to the Arduino change anything? — Maximilian Gerhardt, Commented Apr 2, 2018 at 19:20
@MaximilianGerhardt Yes connecting to RX looks normal but after connected ground to ground unreadable codes appear — Parto, Commented Apr 2, 2018 at 19:23

Michel Keijzers · Accepted Answer · 2018-04-02 18:52:54Z

3

It can have many reasons, but the most likely are:

It helps if you show your sketch(es), for sender/receiver and possibly your circuit.

answered Apr 2, 2018 at 18:52

Michel Keijzers

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Hi Michel thanks for your suggestions, these are my sketches and circuit: imgur.com/a/Ksg4w
– Parto
Commented Apr 2, 2018 at 19:06
It seems the baudrate is correct, start/stop bits is hard to see. Probably the date you send is wrong, you should check what happens in the Brains functions you call and what is returned (which is what you send).
– Michel Keijzers
Commented Apr 2, 2018 at 19:12

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