# Storing Volumetric Flow Data as .txt

**URL:** https://forum.xod.io/t/storing-volumetric-flow-data-as-txt/5790
**Category:** Hardware Interfacing Questions
**Created:** [January 14, 2022, 3:59pm UTC](https://forum.xod.io/t/storing-volumetric-flow-data-as-txt/5790 "2022-01-14T15:59:42Z")
**Posts on this page:** 1
**Showing post:** 13

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### Author: ![xodballxod](https://avatars.discourse-cdn.com/v4/letter/x/f475e1/32.png) [@xodballxod](https://forum.xod.io/u/xodballxod)
#### Post date: [February 10, 2022, 10:03pm UTC](https://forum.xod.io/t/storing-volumetric-flow-data-as-txt/5790/13 "2022-02-10T22:03:45Z")

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PCF8523 appears to be I2C, LCD is I2C, DS18b20 is digital, and the SD-Card is SPI… So, if it’s not all working together, then it is likely you’ve got to time the two I2C devices so they are NOT “running into each other”… I put up an example of how to get multiple I2C working altogether… I hope this helps!

I feel like I had a better example posted, but here’s what I found.

> [@MCP4725 Odd Behavior - does not update with number directly](https://forum.xod.io/t/mcp4725-odd-behavior-does-not-update-with-number-directly/5393):
>
> I’m using the e/MCP4725 library, and it works fine in 2 scenarios, and doesn’t work in another (direct number wire). Basically, can work with deprecated triangle wave, but not the updated triangle wave. I couldn’t get it to update with any kind of number wired directly, even when changing the number to trigger the pulse-on-change inside the mcp4725 node. Works using the example node with the library, with the deprecated triangle-wave node, directly wired to the mcp4725 Works using updated …

I’ve got a big project I’m working on with about 5x I2C on the same wires… I put them in a loop with each “Done” pulse wired into the “Send” pulse of the next device… Works well… But, the above it’s a simpler method for fewer devices.

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