SD Card to 2 devices

Projects General Guidance
1

Hi all I've got a on-going project where I need to get data from a SD card inside a data logger, feed it to my NodeMCU and report the data via googlesheet.

Now for the project I can't reverse engineer the data-logger but I've replicated my own DHT22 sensor and send data to googlesheets via NodeMCU. I have that part working.

Now, I'm trying to do is

  1. Get data from sd card from data logger to NodeMCU.
  2. NodeMCU reads data from SD card and sends data to Thingspeak/Googlesheets.

My only problem is, the SD card is inside the data logger. I want to find a way where the sd card can be accessable by both DATA logger and the NODEMCU, I have bought an SD Card extension cable and my idea is to solder wires and is it possible that the Data logger writes data to the SD Card whils't my nodemcu is reading data at the same time ?

Is this possible or has anyone come across with projects similar to this ?

Any help would be much appreciiated thank you.

2

It is definitely impossible at the same time.
Why don't you want nodemcu to request data from the card through the datalogger interface? - this is the most correct (and believe me, the easiest way)

3

Thank you, I probably get your idea. The only interface I can really touch is the SD card reader as my company doesn't allow me to open it up. So I'm gonna get an SD card reader, insert it, expose the gold pins, solder some wires, connect wires to nodemcu pins am i correct ?

4

no
You have a SD reader already - as a part of datalogger module. You don't need another one, use SD from datalogger.

5

IMG_1401
IMG_14011920×2560 486 KB

Here's the data logger module that I'm talking about

6

Sorry I forget that alll of this is done wirelessly to googlesheets without any physical COM port being used to connect to the computer.

7

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