On Unor R4 minima, after a slave i2c connexion (end request), I realize a begin master connexion. The new master connexion does not transmit messages except first character.The clock pin stays down waiting for interrupt before sending the second character. The error code is time out.
We can't see what you can. Read the pinned post re 'How to get the most from the forum'. Also tell us what OS, IDE and ver.
Recommend to read the above first.
Among information we have missing (in addition to that mentioned by sonofcy) is:
- I2C connection to what device? (make and model number at least)
- a listing of your code so far
- the output of the complete error messages including the "error code"
- a diagram (hand drawn is fine) of how everything is connected including power sources
When you post code or error messages, enclose them in tags using the <CODE/> icon at the top of the editor window. Make sure to highlight the complete text.
You will understand why this information is important after reading the 'How to get the most from the forum' post.