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https://i.ibb.co/0qPDdp0/1.png

I saw such a scheme.

A --> 1K --> +
B --> 1K --> GND

edit:

ok sorry i got it wrong

I had the same problem before. I couldn't see what happened at the address you gave.

My problem was the integrated one I used. Cannot select RX-TX. There are cards that do this job automatically. T ...

I cannot access the link.
Can you renew?

Hello, thanks for answer.

I checked I2C debug.
If the address is incorrect, NAK = 1 appears. If true, 0 appears.
Is there a way to read this lice?
If the address is wrong, I want to turn on the ...

Here you define various slave addresses in the Master code:
#define R_SLAVE1_W 0x10
#define R_SLAVE1_R 0x11

#define T_SLAVE1_W 0x20
#define T_SLAVE1_R 0x21

But in your slave code, you don ...

What resistors are you using on the LED's?.
Because you use 'input_state', if the LED pin does not go high enough top be
seen as a '1' the code will return the wrong value. So if the pins are
'ov ...

You need to get rid of all your SSP ISR code in the master.
Ensure INT_SSP is disabled.
Then where you have:

data = i2c_read(0);

Use the value read here to control the LED's.

Then wherev ...

You do not use I2C_ISR_STATE in a master.

The whole point is in a master _you_ initiate all transfers. There is no
interrupt use for something happening on the bus because things only
happen whe ...

You need to get rid of the ISR code in the master.

I2C_ISR_STATE, is for a _slave_. The '0' condition that starts it, is an
address match (so the slave address being received). Similarly the 0x80 ...

Hello,

I have 1 master and 2 slave cards.
I use pic18f25k22 on all cards.
There are 16 ir leds in slave cards.
Master sends information to slave cards to turn these leds on one by one.
It reads ...

Hi,
I am communicating with i2C. (pic: 18F25K22)
I have 10 slave cards (5 receiver - 5 transmitter).
The master card sends commands for them to operate ir leds.
But I want to see if the i2C commun ...

Where did you make your oscillator settings?

'speed', bus speed is always defined or controlled by the 'master'. However one needs to know the slave capabilities for 'speed'. Obviously you cannot set the bus speed higher than the furtherest, slo ...

Thanks for the answers.

I will try to work at low speeds.
Would the resistance values be appropriate as in the diagram I sent?

https://i.hizliresim.com/8XErNV.png

The length of the cable fro ...