Streaming.h

[bavelt]

Streaming.h

[JChristensen]

Hello,
What sketch are you trying?

[bavelt]

Sketch MCP9800 In the meantime I discovered that descending the 115200 to 9600 baudrate solves the strange characters on the monitor. I have a problem with the MCP9801. The TEMP register is a word (also 2 bytes). But the second (lower) byte always reads 255, so all the bits are “1”. I tried a lot (usually I program with MikroBasic, but can’t solve this issue). That is why I tried the sensor with my Arduino. Do you perhaps recognize this problem of second byte is always high? Thx! bavelt Van: Jack Christensen [mailto:[email protected]] Verzonden: zaterdag 18 januari 2020 14:06 Aan: JChristensen/MCP9800 CC: bavelt; Author Onderwerp: Re: [JChristensen/MCP9800] Streaming.h (#1) Hello, What sketch are you trying? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#1?email_source=notifications&email_token=AOKBGH3IMSDPWA2ZNJKJDVTQ6L5C5A5CNFSM4KIS4LD2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEJJX2HY#issuecomment-575896863> , or unsubscribe <https://github.com/notifications/unsubscribe-auth/AOKBGHYULG7WLQPJTNGS3DTQ6L5C5ANCNFSM4KIS4LDQ> . <https://github.com/notifications/beacon/AOKBGHYZSCBESKV23QNOOZ3Q6L5C5A5CNFSM4KIS4LD2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEJJX2HY.gif>

[JChristensen]

I still don't know what sketch you are referring to. Have you tried the MCP9800_EX1 example sketch?

I don't remember ever seeing the problem you describe, with one byte being all ones.

[bavelt]

Hi Jack,
Yes, it is the MCP9800_EXT sketch.

The sketch works now.
In the meantime I discovered the solution: In the I2c Protocol after the first byte read you have to send an ACK and after the second byte an NAK.
I reversed this.

thx!