/members-area/personalblogs/b/nexgen-flight-simuator/posts/nexgen-fuel-load-meter-revised-plan-of-attackFlash, Food For Thought: Ok, I have a Smart Display, driven by an MCP23017 16-bit I2C which requires a lot of glue, (quick count) 8 data lines, 5 address lines, and 8 control lines. If you count this on your fingers 8+5=13+8=21. Ouch. Oh yes and the en-USTelligent Community 12https://community.element14.com/members-area/personalblogs/b/nexgen-flight-simuator/posts/nexgen-fuel-load-meter-revised-plan-of-attackFri, 23 Dec 2022 19:49:17 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:b6937151-3046-46d0-8b07-bcb106ee11feDAB0<p>RS232 is a good solution for your project, it will work well over distance is fairly tolerant to EMI.</p><img src="https://community.element14.com/aggbug?PostID=24963&AppID=300&AppType=Weblog&ContentType=0" width="1" height="1">https://community.element14.com/members-area/personalblogs/b/nexgen-flight-simuator/posts/nexgen-fuel-load-meter-revised-plan-of-attackThu, 22 Dec 2022 21:43:12 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:b6937151-3046-46d0-8b07-bcb106ee11feJan Cumps1<p>Yes. You used CAN in the past to cross distances. i2c is not really for off-pcb communication - no sturdy physical layer.</p><img src="https://community.element14.com/aggbug?PostID=24963&AppID=300&AppType=Weblog&ContentType=0" width="1" height="1">