You are using level shifters?, the problem then looks as voltage chirp, if you is using only resistors then try to set High the TX pin BEFORE Data transmition!
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You are using level shifters?, the problem then looks as voltage chirp, if you is using only resistors then try to set High the TX pin BEFORE Data transmition!
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@beto
thanks again
i did it as you said
now the response is:
0=ÿ
1=B
2=C
3=D
4=E
5=F
6=G
7=H
8=I
9=J
10=K
11=L
12=M
13=N
14=P
15=R
16=S
17=T
18=U
19=V
20=
i can see first address but not correct value
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