Oct 1, 2019 · Twisted pair cable like ethernet cable may have been a better choice than untwisted pairs. Coax is belt and braces. Fixing the issues, I got the I2C to work reliably over 10m alarm cable. Next time I shall use RS422/485 as this is designed for long-distance cable runs.

Apr 11, 2014 · What is the maximum length of cable that could be used to connect two I2C devices (I2C master-> I2C slave)? Yes, I know that I2C is really designed for intra-board communication. I have been tasked with a "design goal" of using a common I2C bus for multiple I2C slaves to support a demo.

Feb 27, 2024 · However, the 700pF is allocated for cable itself, so there could be up to 800pF. And 2k2 ohms pull-ups are also outside HDMI requirements, so they are hopefully not used anyway. I bet less than 2 meters of cable will be close to …

Mar 25, 2019 · When I decided to use other 2 pairs of the cable for power (+12V), it stopped working. I tested +12V on one pair GND on the other pair, also +12V/GND on same pair: same result, it stopped working. Whole I2C bus stopped working, other devices attached to it too. Wonder if I can use same cable or go to safest choice - another cable for power.

Mar 8, 2020 · I also know I2C is not intended to be used over long wires. However, I made a design where I need to use a cable to connect two devices over I2C. The expected length is 0.2m to 0.5m. I am shopping for wires now and there is a nice 4-wire cable that fits the specs and a very similar cable with wires twisted in 2 pairs.

Oct 9, 2020 · I'm using an I2c sensor (Time of flight, VL6180X breakout board with voltage regulator onboard) at the end of a 1M cable. An arduino controls it. As I2c was not meant to be far away from the PCB and the MCU, I used a 6 core shielded wire to connect the sensor to the Arduino Leonardo. I grounded one side of the cable mesh to the sensor.

Aug 23, 2023 · First, shielded cable is required. I2C is a two-line, single-ended interface. It has a high impedance, and a low logic threshold voltage, so it is very susceptible to ambient noise in both the high and low states.

Aug 30, 2023 · When properly designed and engineered, I2C can go many meters over a cable succesfully, as is proven by billions of cables used in homes, offices, meeting rooms and classrooms - for example each and every modern analog VGA, DVI and HDMI cables successfully use I2C for negotiating supported resolutions between source devices such as computers, video disc players, gaming consoles and displays ...

Purchases of various I2C modules has left me with a variety of I2C pin-outs, and a bit of a task keeping track of the various little ribbon-cable-switching shims I've had to make for them. e.g. Mono OLED module: SCL, SDA, GND, 5V (obviously not ideal, since clock and data are next to …

Each module uses an ATTiny84/85 which handles the various functions of each module (e.g. ADC/DAC). Each micro also acts as an i2c slave (configurable address) and responds to commands from the I²C master (Spark Photon). I'd really like …